There are many reasons why you should use a copyright notice

• Copyright notice makes other users aware that copyright is being claimed in the work.
• Notice identifies the copyright owner at the time the work was first published for parties seeking permission to use the work.
• Notice identifies the year of first publication, which may be used to determine the term of copyright protection in the case of an anonymous work, a pseudonymous work, or a work made for hire.

• Notice may prevent the work from becoming an orphan work by identifying the copyright owner and specifying the term of the copyright.