"Works of unknown authors or where the author's death date is unknown are copyrighted until the shorter of 95 years since the first publication or 120 years since their creation"- See 17 USC 302
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Licensing
Public domainPublic domainfalsefalse
This work was never published prior to January 1, 2003, and is currently in the public domain in the United States because it meets one of the following conditions:
its author died before 1954;
the death date of its author is not known, and it was created before 1904;
it is an anonymous work, a pseudonymous work, or a work made for hire, and it was created before 1904.
The above provisions are contained in 17 U.S.C.§ 303. See also this page for more information.