such as the volume or issue number, to help identify it
+ The registration number or any other copyright data

Motion pictures are often based on other works such as books or
serialized contributions to periodicals or other composite works. *If
you desire a search for an underlying work or for music from a motion
picture, you must specifically request such a search. You must also
identify the underlying works and music and furnish the specific titles,
authors, and approximate dates of these works.*


Searches Involving Assignments and Other Documents Affecting Copyright
Ownership

For the standard hourly search fee, the Copyright Office staff will
search its indexes covering the records of assignments and other recorded
documents concerning ownership of copyrights. The reports of searches in
these cases will state the facts shown in the Office's indexes of the
recorded documents but will offer no interpretation of the content of the
documents or their legal effect.



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LIMITATIONS ON SEARCHES
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In determining whether or not to have a search made, you should keep the
following points in mind: