The rapidly developing Internet technologies not only provides new channels and technical supports for the digital dissemination of works, but also lead to more network copyright infringements. Meanwhile, the traditional mechanism of network copyright protection cannot solve the problems of confirmation,transaction and protection of network copyright. As a result, blockchain technologies could play a key role in solving such problems because of their advantages of decentralization and non-destructive modification. However,blockchain technologies have failed to determine the originality of works,the loss caused by network copyright infringements and other severe problems. In the end,some corresponding countermeasures are put forward.