First, you have to prove that you own the copyright. Once our work is created, the author gets the copyright. However, in litigation, the plaintiff still needs to prove the existence of its copyright. The existence of copyright, in addition to the above should belong to the scope of objects and rights guaranteed by statute law, the plaintiff must also prove that:
The work is original. The requirements for obtaining copyright are different from patents, and must be novel, creative and practical. As long as the copyright is original, it is enough, that is to say, we should create works independently through personal efforts, rather than plagiarizing or copying other people's works. Secondly, you have to prove that the other party has infringed, that is, violated some special rights of the copyright owner protected by law. Copy, exhibition, performance, distribution, etc.
The best way to prevent plagiarism is to put the works on record.