In the digital age, copyright protection faces many challenges, and cryptocurrencies, with blockchain technology, bring new solutions to copyright protection. Traditional copyright protection has problems such as difficult rights confirmation and high cost of rights protection. Cryptocurrencies use the decentralization and non - tamperable characteristics of blockchain to achieve copyright registration. Creators record work information on the blockchain in an encrypted form, generating a unique digital fingerprint to clarify the ownership of the work. For example, music creators can upload their original music to the blockchain. Once recorded, no one can tamper with the creation time and author information of the work. In terms of copyright transactions, the smart contracts of cryptocurrencies play an important role. Creators can set copyright usage terms through smart contracts. When others use the work, the contract is automatically triggered for execution, realizing the automatic payment of copyright fees. This not only simplifies the copyright transaction process but also ensures that the rights and interests of creators are promptly protected. In addition, copyright protection based on cryptocurrencies can also achieve the traceability of the work dissemination path. Through the transaction records on the blockchain, the whole process of the work from creation to dissemination can be clearly understood, providing strong evidence for copyright disputes. Although the application of cryptocurrencies in the field of copyright protection currently still faces some technical and legal challenges, with the development of technology and the improvement of regulations, it is expected to become an important means of copyright protection.