This paper proposes a solution for trustworthy copyright registration of music digital rights using blockchain technology. This solution enables trustworthy copyright registration of digital music and enhances the security of copyright information storage in the music performance industry. The copyright protection system for the music performance industry is designed and implemented on the Hyperledger Fabric platform, and a music performance copyright image encryption algorithm based on wavelet transform and chaos mapping is designed. After generating hash values from the data, it is uploaded to the sample data chain to form a stable blockchain structure. Backup and query functions are performed via Ethereum, and the Camshift algorithm is invoked to track and locate intruders, triggering active warning and defense functions to achieve network threat defense security design. Experimental results show that the copyright registration time for each piece of music increases by approximately 1.9 seconds, and the average feature fingerprint data for each piece of music stored on IPFS consumes approximately 9MB, meeting performance requirements. The use of wavelet transform-based encryption methods enhances the sensitivity of ciphertext, effectively resisting attacks. The final experiment demonstrates the feasibility of the network threat defense solution.