How to watermark your own photographic works to prove copyright?

If someone copies your photographic works and watermarks them, does it prove to be his copyright? So this understanding is wrong.

Copyright (that is, copyright) is naturally acquired with the completion of the creation of works. To prove the ownership of copyright, we must do a good job in copyright protection.

First, keep the backup manuscripts and original works;

Second, apply to the national copyright administration department for copyright registration;

Third, apply to the notary office or other third-party institutions, such as Convergence IP Chain, for copyright deposit certificate, and complete the proof of the author's identity, completion time and content of the work;