Copyright security protection of NFT digital art works in new media communication

In the new media communication environment, digital art faces severe infringement challenges -diversified forms, fast spread, and cross-platform supervision difficulties.Traditional copyright protection struggles to address these effectively.This study focuses on the copyright security issues of NFT digital artworks in new media communication, and proposes a comprehensive protection framework that integrates blockchain-based rights confirmation, smart contract authorisation, and multi-level monitoring and traceability mechanisms.The experimental results show that: 1) in terms of infringement detection, the integrated method is significantly superior to traditional methods in scenarios of Joint Photographic Experts Group (JPEG) compression and central cropping, and its F1-score reaches 94.4%; 2) in terms of blockchain-based evidence storage, for a sample size of one thousand, the evidence integrity reaches 97.9%, the traceability accuracy reaches 96.7%, and the anti-tampering rate reaches 97.5%.The study has positive significance for promoting the healthy development of the digital art industry.