by the United States Copyright Office

Summary

by the United States Copyright Office International Copyright Relations of the United States

There is no such thing as an “international copyright” that will automatically protect an author’s writings throughout the world. Protection against unauthorized use in a particular country basically depends on the national laws of that country. However, most countries offer protection to foreign works under certain conditions that have been greatly simplified by international copyright treaties and conventions. There are several such treaties and conventions affecting copyright, including the Berne Union for the Protection of Literary and Artistic Property (Berne Convention)
Source: Wikisource

by the United States Copyright Office International Copyright Relations of the United States

If possible, this should be done before the work is published anywhere, because protection may depend on the facts existing at the time of first publication.
If the country in which protection is sought is a party to one of the international copyright conventions, the work generally may be protected by complying with the conditions of that convention. Even if the work cannot be brought under an international convention, protection under the specific provisions of the country’s national laws may still be possible.
Source: Wikisource

by the United States Copyright Office International Copyright Relations of the United States

Published Works.—The works specified by sections 102 and 103, when published, are subject to protection under this title if—
(1) on the date of first publication, one or more of the authors is a national or domiciliary of the United States, or is a national, domiciliary, or sovereign authority of a treaty party, or is a stateless person, wherever that person may be domiciled; or (2) the work is first published in the United States or in a foreign nation that, on the date of first publication, is a treaty party; or (3) the work is a sound recording that was first fixed in a treaty party
Source: Wikisource

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