Where does "all rights reserved" come from?
U.S. law no longer requires the use of a copyright notice, although placing it on your work is often beneficial. Prior law did, however, contain such a requirement, and the use of a notice is still relevant to the copyright status of older works.
Since the enactment of the Berne Convention Implementation Act, notice has become optional for all works published on or after March 1, 1989 in the United-States.
The use of the notice is the responsibility of the copyright owner and does not require permission from, or registration with, the Copyright Office.
Use of the notice informs the public that a work is protected by copyright, identifies the copyright owner, and shows the year of first publication (to inform viewers of the date upon which the work will fall into the public domain).
For works first published on or after March 1, 1989, use of the copyright notice is optional. Before March 1, 1989, the use of the notice was mandatory on all published works.
Omitting the notice on any work first published sometimes resulted in the loss of copyright protection.
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