All About Your Copyright Office - The US Copyright Office
Does a Work Have to Originate from the United States?
Copyright protection is available for all unpublished works, however, published works need to meet conditions.
Does an American Copyright Have International Copyright Protection?
There is no such thing as an international copyright.
Can Foreigners Register Their Works with the US Copyright Office?
Any work that is protected by US copyright law can be registered.
Copyright Office Information Circulars and Form Letters
All of the official United States Copyright Office information circulars are available in Adobe Acrobat PDF format, and some are also in HTML text versions.
The online version of the U.S. Copyright law is in the Adobe Acrobat PDF format.