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The copyright symbol, or copyright sign, designated by (a circled capital letter "C"), is the symbol used in copyright notices for works other than sound recordings.
Musicians copyrighted their publications of musical notation as literary writings, but performing copyrighted pieces and creating derivative works were not restricted by early copyright laws. Copying was widespread, in compliance with the law, but expansions of those laws intended to benefit literary works and responding to commercial music ...
It is analogous to the copyright symbol, which is commonly used to indicate that a work is copyrighted, often as part of a copyright notice. The Public Domain Mark was developed by Creative Commons [1] [2] and is only an indicator of the public domain status of a work – it itself does not release a copyrighted work into the public domain like ...
In 2025, the works unbound from copyright cap off the 1920s with literature, characters and more from 1929 entering the public domain. ... (Jan. 1), meaning their copyright times out.
The proper copyright notice for sound recordings of musical or other audio works is a sound recording copyright symbol (℗, the letter P inside a circle, Unicode U+2117 ℗ SOUND RECORDING COPYRIGHT), which indicates a sound recording copyright, with the letter P indicating a "phonorecord".
Public Domain Mark enables works that are no longer restricted by copyright to be marked as such in a standard and simple way, making them easily discoverable and available to others. The Public Domain Mark is recommended for works that are free of known copyright around the world. These will typically be very old works. [1]
The absence of a copyright notice does not mean that a work may be freely used (at the same time, copyright notices have sometimes been incorrectly applied to uncopyrighted material). If in doubt, assume you cannot use it. You can add any type of content if it has been made available by authors under an appropriate license (see below). It's not ...
The copyright notice must also contain the year in which the work was first published (or created), and the name of the copyright owner, which may be the author (including the legal author/owner of a work made for hire), one or more joint authors, or the person or entity to whom the copyright has been transferred.