Blockchain Papers

Samukeliso Mabarani, Mohammad Saidur Rahman, Iqbal Gondal, H. M. N. Dilum Bandara

No abstract is available for this record.

Shahbaz Siddiqui, Sufian Hameed, Muhammad Rafi, Syed Attique Shah · 5 authors

The development of blockchain consensus mechanisms has put sustainability, scalability, and efficiency first in the list of cryptocurrency studies. As Bitcoin still uses the energy-intensive Proof-of-Work (PoW) algorithm, Ethereum is in the process of switching from PoW to Proof-of-Stake (PoS) with the Ethereum Merge in September 2022. The cause of this change was the rising energy prices, bottlenecks in scalability, and increased concerns among the global population regarding the environmental effects of PoW-based mining. Our study provides a rationale for the Ethereum transition by comparing and contrasting the volume of transactions, network performance through hash rate, and electricity consumption of Bitcoin and Ethereum in their PoW stages.With the help of both historical trend and predictive modelling in the form of the ARIMA framework, the obtained results showed that Bitcoin and Ethereum had different dynamics of growth under PoW, which was increased hash and energy expenditures but limited throughput. The ARIMA-based analysis achieved a mean absolute error (MAE) of 27.76, a root mean square error (RMSE) of 31.16, and a mean absolute percentage error (MAPE) of 26.08, which provided an overall forecast accuracy of 73.9%. These measures show that there is a medium predictive reliability, and volatility is mainly caused by sudden changes in mining intensity and market forces. The predictions further indicated that under PoW, Ethereum would have experienced a steep rise in operational energy consumption and congestion of its network transactions, which would have weakened network sustainability.Results thus confirm that the switch of Ethereum to PoS was not only an environmental need but also a strategic optimization of a transaction to scale higher, operational overhead reduction, and alignment with sustainable and ESG (Environmental, Social, and Governance) goals on a global scale. This piece leads to a better comprehension of the trade-offs between PoW and PoS, as well as the Ethereum consensus shift as the turning point in the evolution of blockchains—establishing a precedent of other cryptocurrencies that can select a balance between performance, security, and sustainability.

Dr. N. R. Ananthanarayanan, Mr. Suresh Subbu

Abstract: Blockchain technology is a transformative distributed ledger paradigm that enables secure, transparent, and tamper-resistant data management without centralized authorities. At its core lies the consensus mechanism-the protocol through which distributed nodes agree on a single canonical transaction history. This paper presents a structured review of major blockchain consensus schemes including Proof-of-Work (PoW), Proof-of-Stake (PoS), and Practical Byzantine Fault Tolerance (PBFT), as well as emerging hybrid models such as Avalanche and Polkadot. The analysis evaluates sustainability, scalability, security, and decentralization characteristics, offering a comprehensive comparison across these mechanisms. The findings highlight inherent trade-offs related to energy consumption, throughput, finality, validator governance, and fault tolerance. The study concludes by identifying open research challenges important for designing next-generation blockchain systems capable of supporting large-scale, mission-critical applications. Keywords: Avalanche, Blockchain, Consensus Mechanisms, PBFT, PoS, PoW, Scalability, Security, Sustainability. Title: Study and Comparative Analysis of Blockchain Consensus Mechanisms Author: Dr. N. R. Ananthanarayanan, Mr. Suresh Subbu International Journal of Recent Research in Mathematics Computer Science and Information Technology ISSN 2350-1022 Vol. 12, Issue 2, October 2025 - March 2026 Page No: 1-15 Paper Publications Website: www.paperpublications.org Published Date: 25-November-2025 DOI: https://doi.org/10.5281/zenodo.17711245 Paper Download Link (Source) https://www.paperpublications.org/upload/book/Study%20and%20Comparative%20Analysis%20of%20Blockchain-25112025-2.pdf

Luo Zihang

The public ledger characteristic of blockchain grants data immutability but simultaneously introduces privacy leakage risks, making association analysis between on-chain behaviors and real-world identities possible. Existing privacy protection schemes struggle to balance the anonymity of the querier with the traceability of malicious behaviors. On one hand, legitimate inquiry behaviors are easily reverse-tracked by third parties through on-chain records (i.e., "human flesh search" targeting the querier); on the other hand, a completely anonymous environment may lead to data abuse without the possibility of accountability.To address this issue, this paper proposes an anti-"human flesh search" privacy protection system based on blockchain and zero-knowledge proofs. Addressing the aforementioned contradictions, this paper presents a blockchain data sharing scheme that balances privacy and regulation. The scheme utilizes IPFS to implement graded encrypted storage for large files. The core innovation lies in combining the Schnorr protocol and Chameleon Hash to construct a Blockchain Designated Verifier Proof (BDVP). While verifying user query permissions through blockchain smart contracts, the system utilizes the trapdoor property of the Chameleon Hash to achieve the non-transferability of proofs, preventing third parties from reverse-tracking the querier's identity by analyzing on-chain records^{[<xref ref-type="bibr" rid="R2">2</xref>]}. Furthermore, the system introduces a threshold private key held by regulatory agencies to ensure that, in the event of data abuse, malicious users can be de-anonymized and held accountable according to the law.

Simon Mertel, Till Zwede, Alexander Rieger, Ruben Mayer · 6 authors

No abstract is available for this record.

Nikshey Yadav

No abstract is available for this record.

Ram Kumar Solanki, Ganesh R. Pathak, Amit Gadekar, Abhishek Dhore · 6 authors

The spread of Distributed Ledger Technology (DLT) beyond its roots in cryptocurrency has led to a proliferation of blockchain frameworks with differing architectural philosophies, performance attributes, and applications in mind. This non-uniformity poses a significant problem for enterprises and developers who aim to find the best platform that suits them. The paper is based on a rigorous, multi-dimensional comparison of the four most crucial blockchain frameworks that encompass the breadth of the current DLT: Ethereum as an early smart contracts and decentralized application pioneer, Hyperledger Fabric for permissioned blocks designed to work in enterprise consortia, R3 Corda as a privacy-oriented ledger that is suitable to regulated industries, and Solana as a high-performance public blockchain that was developed to support web-scale applications. The paper breaks down the major architectural building blocks of each framework, including their permissioning models, data models, consensus models, and execution environments for smart contracts. Next, it compares their scalability and performance by combining the findings of notable benchmark experiments with relevant performance metrics (throughput and latency). Moreover, the paper investigates practical adoption by examining notable examples in financial services, supply chain management, and the fundamental growth of the Web3 economy. The most valuable output of this study is a synthesized framework selection matrix, which aligns platform abilities with the particular business and technical requirements as an evidence-based (observed in the field) guide that practitioners can use; at the same time, it will serve as a well-structured point of departure in future academic studies and research on the topic of distributed systems.

Ahmad Musamih, Khaled Salah, Raja Jayaraman, Samer Ellahham · 6 authors

Non-fungible tokens (NFTs) are unique digital assets stored on blockchains. NFTs are ideally suited for tokenizing genomic data, as they empower individuals with complete control over them. Next-generation sequencing (NGS) technology creates repositories of sequenced data from individuals’ raw genomic data, which raises challenges related to data ownership, management, and secure sharing. In this paper, we propose a blockchain and NFT-based solution that addresses the challenges of managing, sharing, and monetizing genomic data while preserving privacy using Threshold Cryptography and Fully Homomorphic Encryption (FHE). We integrate the proposed solution with the Interplanetary File System (IPFS), a decentralized storage system, to handle the substantial amount of genomic data off-chain. We develop three smart contracts to facilitate genomic data management, sharing, and monetization. We introduce composable NFTs to ensure that sequenced genomic data (SGD) NFTs are always linked to the parent raw genomic data (RGD) NFTs to maintain traceability. We present various diagrams and algorithms to illustrate the functionality of our solution. Our testing and validation results demonstrate that smart contracts function as intended. The cost evaluation shows that implementing the solution on a private blockchain is more feasible and user-friendly. Our solution provides a comprehensive framework for genomic data management, sharing, and monetization, with privacy-preserving mechanisms and traceability. We provide guidelines for the generalizability of our solution beyond genomics and outline the challenges and limitations of the proposed solution. We make the source code of the smart contracts publicly available on GitHub.

Paulo Caetano da Silva, Djalma Oliveira Costa Filho, Daniel Jose Diaz, José Alan da Silva Teixeira

Blockchain has received a lot of attention for multiple use cases and applications since the first works emerged about 15 years ago, with its use targeting cryptocurrencies. During this period, a wide variety of platforms (e.g. Ethereum, Hyperledger, and others web3 Blockchain platforms), tools, programming languages and other resources such as smart contracts were proposed. With the aim of better understanding the use of smart contracts in Blockchain-based systems, this article presents a systematic review of the literature on Blockchain application architectures that make use of smart contracts, applied in different areas. It is expected to bring together approaches for the design and implementation of smart contracts on the Blockchain.

Michael Wijaya, Franscelino Melvyn, Reina Setiawan, Reinert Yosua Rumagit

Blockchain technology has emerged as a breakthrough in decentralized systems. The development of applications, systems, programs, and financial solutions can now be managed in a decentralized manner, revolutionizing the previously centralized paradigm. In this new system, performance, scalability, transaction costs, and network security present both challenges and compelling topics for research. This paper conducts a comparative analysis through experiments and evaluations of Ethereum and Solana, the two largest Layer 1 blockchain networks today. The comparison focuses on performance, consensus mechanisms, security, and ecosystem development. Performance is assessed through Transactions Per Second (TPS) and latency, while gas fees are compared under different network conditions. The study also analyzes Ethereum’s Proof-of-Stake (PoS) versus Solana’s Proof-of-History (PoH) + PoS consensus mechanisms. Network security is examined by reviewing historical vulnerabilities and corresponding responses. The DApp (Decentralized Application) ecosystem is evaluated based on Adoption Efficiency Index (AEI) and sector specialization (DeFi, NFT, gaming). Through this analysis, the paper aims to provide a deeper understanding of the differences, strengths, and weaknesses of both networks, helping developers choose the most suitable blockchain platform.

Saad Mutlaq Alluhaydan, Mohammed Obaid Alshammari, Yousef Jazaa Obaid Alshmilan, Ahmed Hamoud Alshammari · 12 authors

Background: The rise of AI health assistants and digital tools raises concerns about data security and consent management. Traditional systems are prone to failures and provide limited transparency in data sharing. Blockchain technology offers a decentralized, immutable, and secure solution to these issues. Aim: This narrative review critically examines the real-world implementations and security trade-offs of blockchain technology when applied specifically to health assistant audit trails and consent management, moving beyond theoretical propositions. Methods: A systematic search of peer-reviewed literature (2010-2024) was conducted across Scopus, IEEE Xplore, PubMed, and ACM Digital Library. Implementation case studies, prototypes, and theoretical frameworks were analyzed to assess technical architectures, performance metrics, and security evaluations. Results: Findings indicate an emerging landscape where blockchain proves useful for creating secure audit logs in AI decision-making and dynamic consent models using smart contracts. However, challenges persist, including performance and scalability issues, key management complexities, data linkage risks, and conflicts between immutability and regulatory requirements such as the GDPR's "right to be forgotten." Conclusion: Blockchain serves as a foundational layer to improve security and transparency in health assistant ecosystems. Its future potential relies on hybrid architectures, advanced cryptographic methods such as zero-knowledge proofs, and an awareness of the new security and operational challenges that arise. It is not merely a database but a comprehensive solution for integrity and control.

Nagendra Harish Jamithireddy

This article presents a blockchain reconciliation framework that improves transparency, automation, and trust within the SAP supply chain and finance processes. The implemented system with smart contracts on SAP modules FI, MM, and SD permits real-time verification of supply chain activities and financial transactions, thus minimizing manual matching and third-party verification processes. The framework enables automated three-way matching and updates across modules by storing transaction states in a distributed ledger that captures changes. Based on experiments conducted using SAP simulation data, the accuracy of reconciliations increased by 92%, processing time was cut by 41%, and manual processing steps were reduced by 67%. The results demonstrate the capability of blockchain technology to solve pervasive challenges related data integrity and reconciliation within enterprise ERP systems.

Amit Karbhari Mogal, Mallikarjun G Hudedmani

This chapter explores the critical intersection of consensus mechanisms and performance metrics in blockchain systems for the Internet of Things (IoT). As IoT networks expand, the demand for scalable, efficient, and secure blockchain solutions intensifies. This chapter evaluates the trade-offs between energy efficiency, latency, scalability, and security within IoT-integrated blockchain frameworks. Key consensus protocols such as PoW, Proof of Stake (PoS), and Delegated DPoS) are analyzed for their applicability in IoT environments, highlighting their impact on transaction speed, resource utilization, and network resilience. Hybrid consensus models are examined for their potential to balance performance with robust security. The chapter also provides real-world case studies that benchmark latency and energy efficiency, offering insights into the practical challenges and opportunities for IoT-based blockchain applications. Key findings contribute to the ongoing development of optimized blockchain solutions for IoT networks.

Jia Xiangjuan, Fang Xinwei, Zhang Yijie, Heng Yuan · 8 authors

In the Web3.0 era, which does not rely on any centralized organization and emphasizes user control, security, trustworthiness and the importance of data privacy, blockchain plays a key role. Its decentralization, security and trustworthiness and other characteristics have become Building the infrastructure of trusted interconnection and value interconnection in the Web3.0 era has laid the foundation for the development of Web3.0. With the development of Web3.0, blockchain technology itself is also continuing to develop. There are more and more researches on the integration and innovative development of blockchain technology with big data, artificial intelligence, metaverse, Internet of Things and privacy computing. In this context, the basic principles and characteristics of Web3.0 and blockchain technology are first explained, focusing on the decentralization, traceability and non-tampering characteristics of blockchain, and then an overview of the relationship between blockchain and The advantages of the integrated innovation and development of big data, artificial intelligence, metaverse, Internet of Things and privacy computing are analyzed.The standardization construction situation and future work prospects of the integrated innovation and development of blockchain technology under Web3.0 are analyzed.

Kun Yan, Wenping Ma, Shaohui Sun

5G networks provide secure and reliable information transmission services for the Internet of Everything, thus paving the way for 6G networks, which is anticipated to be an AI-based network, supporting unprecedented intelligence across applications. Abundant computing resources will establish the 6G Computing Power Network (CPN) to facilitate ubiquitous intelligent services. In this article, we propose BECS, a computing sharing mechanism based on evolutionary algorithm and blockchain, designed to balance task offloading among user devices, edge devices, and cloud resources within 6G CPN, thereby enhancing the computing resource utilization. We model computing sharing as a multi-objective optimization problem, aiming to improve resource utilization while balancing other issues. To tackle this NP-hard problem, we devise a kernel distance-based dominance relation and incorporated it into the Non-dominated Sorting Genetic Algorithm III, significantly enhancing the diversity of the evolutionary population. In addition, we propose a pseudonym scheme based on zero-knowledge proof to protect the privacy of users participating in computing sharing. Finally, the security analysis and simulation results demonstrate that BECS can fully and effectively utilize all computing resources in 6G CPN, significantly improving the computing resource utilization while protecting user privacy.

Lucas Clover Alcolea, Jan Mihal

This paper argues that cryptocurrency, including cryptocurrencies such as Bitcoin, should be understood as qualified property. We build up support for this claim in three stages: first, we outline the diversity of cryptocurrencies, a diversity which is underappreciated in the current literature. We then outline the importance of theoretical presuppositions which operate in the ‘cryptocurrencies as property’ debate. This is followed by a detailed critique of established positions. We explore the shortcomings of three commonly-held views in the debate: that cryptocurrencies are property, belonging to a third category of personal property beyond the choses in possession/choses in action distinction; that cryptocurrencies are property and belong to the category of choses in action; and, lastly, that cryptocurrencies are not property at all. We then develop a new analysis of property in cryptocurrencies, taking into account both the variety of cryptocurrencies which exist and capturing the doctrine operating currently in property law, including its theoretical underpinnings. Through understanding rights in property as relative, and property itself as a scale, we avoid the shortcomings of other popular accounts whose shortcomings we identify, and show that cryptocurrencies are a form of choses in possession – namely, qualified property.

Pohsun Feng, Ziqian Bi, Yan, Lawrence K. Q., Yizhu Wen · 17 authors

A detailed exploration of blockchain technology and its applications across various fields is provided, beginning with an introduction to cryptography fundamentals, including symmetric and asymmetric encryption, and their roles in ensuring security and trust within blockchain systems. The structure and mechanics of Bitcoin and Ethereum are then examined, covering topics such as proof-of-work, proof-of-stake, and smart contracts. Practical applications of blockchain in industries like decentralized finance (DeFi), supply chain management, and identity authentication are highlighted. The discussion also extends to consensus mechanisms and scalability challenges in blockchain, offering insights into emerging technologies like Layer 2 solutions and cross-chain interoperability. The current state of academic research on blockchain and its potential future developments are also addressed.

Chinmay

The world has seen enormous disruption by new age technologies in every domain of today's economy including the arena of art, music and entertainment. Furthermore, the impact of artificial intelligence and blockchain technology particularly the Non Fungible Tokens (NFTs) has overwhelmed scholars about their understanding of laws related to intellectual property. Advances in technology are expanding the scope of intellectual property beyond traditional patents, trademarks, designs, trade secrets, plant breeders' rights, and more. Various issues related to intellectual property have taken centre stage in the world of NFTs and Blockchains. Intellectual property disputes over virtual goods and NFTs are on the rise, and countries across the world are endeavoring to address the issues related to the protection of virtual goods. This article analyses the nature and scope of protection granted to virtual goods and NFTs in major jurisdictions viz the US and China. Further, the article analyses if the provisions of Indian IP Laws particularly the Trademarks and Designs Acts are sufficient to grant protection to the virtual goods.

Kuiwei Yu, Guanxun Cui

In the digital information age, the traditional centralized storage model is vulnerable to security attacks, which leads to the spread of false information and difficulty in tracing. This study proposes a decentralized campus information security system using blockchain technology and builds a tamper-proof, traceable, and privacy-protected architecture through Ethereum and Inter Planetary File System (IPFS). The system uses zero-knowledge proof and homomorphic encryption technology to ensure privacy and uses IPFS as an off-chain storage mechanism to improve the scalability of the system and data access speed. Experimental results show that compared with traditional digital applications, the system performs well in ensuring the authenticity and security of information and effectively protects user privacy.

Jielin Yang, Chuan Li, Xingtong Sun, Fang Yang

Abstract: In traditional digital identity management solutions, the authentication process mostly adopts a centralized authentication model, where user identity data is stored in a single authentication authority, which leads to a myriad of problems such as data leakage, data tampering, and single point of failure. How to ensure the security of user identity data and how to carry out effective privacy protection is the key to ensuring the digitalization process in various industries. Blockchain has the characteristics of decentralization and tampering, which can provide a reliable data storage solution. Zero-knowledge proof technology can verify the correctness of certain facts without revealing specific information. In digital identity applications, zero-knowledge proof allows users to prove their identity without revealing any personal information. Therefore, this paper proposes an identity authentication model based on blockchain and zero-knowledge proof to ensure the security of the user's identity data during the identity authentication process. Meanwhile, in order to make the authentication process more reliable, smart contract technology is introduced to complete the whole authentication process.

Vitor Ayres Principe

A gestão esportiva está se tornando mais desafiadora com os avanços tecnológicos a partir das transformações significativas nos modelos de negócios e na interação entre fãs e clubes. A Web3 oferece uma oportunidade para melhorar essa gestão, trazendo maior eficiência, transparência e envolvimento das partes interessadas, podendo revolucionar a interação dos fãs e a monetização de equipes, permitindo uma participação mais ativa de seus torcedores. As Organizações Autônomas Descentralizadas (DAOs) representam uma inovação que pode promover maior transparência, engajamento dos fãs e eficiência na gestão esportiva, introduzindo um novo modelo de governança, possibilitando decisões mais democráticas e colaborativas. No entanto, a adoção dessas tecnologias ainda enfrenta desafios e requer uma mudança cultural no setor esportivo. Objetivo: Verificar, compreender e analisar como a aplicação da Web3 pode auxiliar no potencial dos negócios no setor esportivo com a adoção das tecnologias emergentes. Materiais e métodos: O primeiro estudo consistiu em uma revisão sistemática da literatura utilizando a metodologia PRISMA e EBSE, onde foram analisados 37 estudos primários sobre a aplicação da tecnologia blockchain no esporte. Esse levantamento permitiu um entendimento abrangente das aplicações atuais e do potencial futuro dessa tecnologia no setor esportivo. O segundo estudo, também baseado em uma revisão sistemática, analisou 25 artigos específicos sobre fan tokens, abordando suas características técnicas e seu papel na melhoria da participação dos fãs em decisões menores dos clubes esportivos. No terceiro estudo, foi realizada uma análise correlacional de 20 fan tokens, utilizando dados financeiros e de mercado coletados do site CoinGecko. A análise revelou que a avaliação totalmente diluída (FDV) dos tokens correlaciona-se significativamente com o preço e a capitalização de mercado, indicando que as expectativas futuras estão alinhadas com as avaliações de mercado. Entretanto, a proporção de capitalização do mercado (M/FDV) apresentou correlação negativa, sugerindo que uma menor M/FDV pode indicar uma tendência de aumento nos preços futuros devido à percepção de subvalorização. No quarto estudo, foi proposto um modelo conceitual para a criação e utilização de uma DAO para a gestão de uma entidade esportiva, baseado em princípios de governança e empoderamento da comunidade. Esse modelo destaca a importância de uma abordagem colaborativa entre clubes, fãs, desenvolvedores de tecnologia e reguladores para a concretização do potencial dessas inovações. Conclusão: A partir dos resultados encontrados nos artigos, observou-se que a tecnologia blockchain tem potencial para revolucionar a gestão esportiva, tornando-a mais inclusiva, transparente e eficiente. Os fan tokens destacam-se como uma ferramenta significativa para aumentar o engajamento dos fãs e gerar novas fontes de receita. No entanto, a concretização desse potencial depende de uma abordagem colaborativa entre clubes, fãs, desenvolvedores de tecnologia e reguladores. A dualidade desses ativos, enquanto promovem uma conexão entre os fãs, introduz complexidades técnicas, financeiras e regulatórias que requerem atenção. Pesquisas futuras devem focar na criação de diretrizes regulatórias específicas e na análise do impacto econômico e social dessas inovações para maximizar os benefícios e superar os desafios associados à sua adoção no setor esportivo

Sahista Pathan

Blockchain technology relies on consensus mechanisms, which are essential systems for validating transactions and ensuring their authenticity. These mechanisms maintain a permanent record of all valid transactions within a blockchain, establishing trust among users of cryptocurrencies like Bitcoin and Ethereum. By verifying and confirming transactions, consensus mechanisms Safeguard the integrity and protection of the blockchain network, safeguarding it from fraud or malicious activities. Once validated, a transaction is permanently added to the blockchain, becoming an immutable part of the network’s ledger. The process of building trust in a decentralized blockchain environment hinges on the consensus mechanism's ability to facilitate agreement among network participants (nodes). A variety of consensus methodologies have been developed to fulfill this need, each with its unique approach to ensuring security, transparency, and efficiency. For instance, Proof of Work (PoW) involves participants solving intricate mathematical puzzles to validate transactions, whereas Proof of Stake (PoS) grants validation rights based on the amount of cryptocurrency a participant owns. Moreover, more energy-efficient and scalable models like Delegated Proof of Stake (DPoS) and Practical Byzantine Fault Tolerance (PBFT) have been developed to tackle the challenges of blockchain scalability and sustainability. In this paper, we explore the various consensus mechanisms used in blockchain systems, comparing their strengths, weaknesses, and real-world applications. We aim to provide a comprehensive overview of how these mechanisms function, their role in maintaining security, and their impact on the broader blockchain ecosystem

Abel C. H. Chen

The blockchain system has emerged as one of the focal points of research in recent years, particularly in applications and services such as cryptocurrencies and smart contracts. In this context, the hash value serves as a crucial element in linking blocks within the blockchain, ensuring the integrity of block contents. Therefore, hash algorithms represent a vital security technology for ensuring the integrity and security of blockchain systems. This study primarily focuses on analyzing the security and execution efficiency of mainstream hash algorithms in the Proof of Work (PoW) calculations within blockchain systems. It proposes an evaluation factor and conducts comparative experiments to evaluate each hash algorithm. The experimental results indicate that there are no significant differences in the security aspects among SHA-2, SHA-3, and BLAKE2. However, SHA-2 and BLAKE2 demonstrate shorter computation times, indicating higher efficiency in execution.

Faheem Ullah, Jingsha He, Nafei Zhu, Ahsan Wajahat · 8 authors

In the realm of modern healthcare, Electronic Health Records EHR serve as invaluable assets, yet they also pose significant security challenges. The absence of EHR access auditing mechanisms, which includes the EHR audit trails, results in accountability gaps and magnifies security vulnerabilities. This situation effectively paves the way for unauthorized data alterations to occur without detection or consequences. Inadequate EHR compliance auditing procedures, particularly in verifying and validating access control policies, expose healthcare organizations to risks such as data breaches, and unauthorized data usage. These vulnerabilities result from unchecked unauthorized access activities. Additionally, the absence of EHR audit logs complicates investigations, weakens proactive security measures, and raises concerns to put healthcare institutions at risk. This study addresses the pressing need for robust EHR auditing systems designed to scrutinize access to EHR data, encompassing who accesses it, when, and for what purpose. Our research delves into the complex field of EHR auditing, which includes establishing an immutable audit trail to enhance data security through blockchain technology. We also integrate Purpose-Based Access Control (PBAC) alongside smart contracts to strengthen compliance auditing by validating access legitimacy and reducing unauthorized entries. Our contributions encompass the creation of audit trail of EHR access, compliance auditing via PBAC policy verification, the generation of audit logs, and the derivation of data-driven insights, fortifying EHR access security.