SAAChain: release and storage platform of digital works based on non-fungible tokens.

The article focuses on SAAChain, a blockchain-based platform designed to protect the copyright of original digital image works through an adaptive learning similarity detection fusion strategy and non-fungible tokens (NFTs). SAAChain verifies the originality of uploaded images using a combination of four image similarity metrics before minting them as NFTs stored on the InterPlanetary File System (IPFS) and linked via Ethereum's ERC-721 smart contracts, enabling transparent, tamper-proof copyright registration and efficient digital rights transactions. The system incorporates a decentralized network of nodes for verification, dispute resolution, and copyright management, enhancing security, traceability, and ownership confirmation without reliance on central authorities. Experimental results demonstrate that the adaptive fusion strategy achieves over 97% accuracy in originality verification, while the use of IPFS reduces blockchain storage pressure and improves system performance. This approach advances digital copyright protection by integrating originality authentication with NFT-based ownership and flexible, transparent copyright circulation.