Reasons To Include An Optional Copyright Notice
A copyright notice may still be used as a deterrent against infringement, or as a notice that the owner intends on holding their claim to copyright. It is also a copyright violation, if not also a federal crime, to remove or modify copyright notice with intent to "induce, enable, facilitate, or conceal an infringement". Also worth noting is that copyright notice has never been required on "unpublished" works, the copyright of which may last for well over 100 years.
Inclusion of a proper copyright notice on the originals is also evidence that the copyright owners may use to defeat a defense of "innocent infringement", to avoid "statutory damages", other than in certain cases claiming a "fair use" defense.
Read more about this topic: Copyright Notice
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