The phrase copyright protection is misleading and ambiguous and should be avoided. It's often used to refer to:
The monopoly granted to authors by copyright (e.g. "The 1996 act provided additional copyright protection."). Protection is being used politically here, violating Wikipedia's neutral point of view.
Copy prevention mechanisms that prevent things being copied (e.g. "The game came with copyright protection."). These mechanisms prevent all forms of copying, not just those that violate copyright, so calling them copyright protection is incorrect.
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Copyright is a form of protection provided by the laws of the United States (title 17, U. Code) to the authors of “original works of authorship,” including literary, dramatic, musical, artistic, and certain other intellectual works.
Copyright in each separate contribution to a periodical or other collective work is distinct from copyright in the collective work as a whole and vests initially with the author of the contribution.
Copyright is a personal property right, and it is subject to the various state laws and regulations that govern the ownership, inheritance, or transfer of personal property as well as terms of contracts or conduct of business.
In enacting the Copyright Act of 1976, Congress acknowledged that the "history of copyright law has been one of gradual expansion in the types of works accorded protection." The intent of Congress to ensure that copyright law remains flexible and adaptable to new technology is without doubt.
Copyrightprotection arises automatically "in original works of authorship fixed in any tangible medium of expression, now known or later developed, from which they can be perceived, reproduced, or otherwise communicated, either directly or with the aid of a machine or device."
Because the originality requirement of copyright is derived from the copyright clause in the Constitution, Congress might not have the authority to enact statutory protection.