Non-Fungible Tokens Based on Immutability, Extended Metadata Structures and Cryptographic Signatures for Decentralized Authentication and Distribution of Art

Abstract

Non-fungible tokens (NFTs) are widely used to distribute and authenticate digital artworks, yet minting practices across Ethereum, Solana, and Tezos sometimes diverge from core blockchain objectives, decentralization, immutability, and verifiable on-chain identity, thereby limiting their suitability as long-term certificates of authenticity. This study examines the technical, structural, and archival sources of these limitations and introduces a framework grounded in immutability, extended metadata and cryptographic signatures. Within this framework, the extended metadata file serves as the primary source of authenticity by self-sufficiently integrating the artist’s identity, artwork identification, edition semantics, token identification, and preservation guidance. The paper further evaluates decentralized storage models relevant to certification-grade use cases. It compares private servers, fully on-chain metadata, Arweave, and IPFS in terms of verifiability, sustainability, and long-horizon stewardship burden. Although Ethereum's ERC-721 serves as a reference implementation to anchor terminology and verification procedures, the proposed requirements are ecosystem-independent as long as the ecosystem meets the principles of decentralization, immutability and adoption. By aligning NFT issuance with established digital-preservation frameworks (OAIS, InterPARES, LOCKSS, PREMIS), this work offers a concrete foundation for future ERC/EIP proposals, preservation policy, and interdisciplinary research on durable, independently verifiable digital-art authenticity.