United States Copyright Office · founded1897-01-01

valid_from

1897-01-01

valid_to

null (still holds)

confidence

0.85

superseded_by

null

first seen

2026-10-27

last updated

2026-10-28

Sources

• http://copyright.gov/circs/circ1a.htmlsecondary · copyright.gov
• https://www.copyright.gov/about/secondary · copyright.gov
• https://www.wikidata.org/wiki/Q1784058secondary · wikidata.org

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