7B10.3. Copyright status unknown or unverified (Note Area - Notes - Copyright registration information)
If the copyright for the work has been researched and the status remains unknown, then use the term "unknown" in the copyright note.
500 ## $a Copyright: unknown.
If the copyright for the work has not been researched, then use the term "unverified" in the copyright note.
500 ## $a Copyright: unverified.
If the copyright status is unknown or unverified and a copyright notice appears on the work or associated documentation, record the name and date in an additional note.
500 ## $a Copyright: unknown.
500 ## $a Copyright notice on film: Mimmers, Inc. ; 2000.
500 ## $a Copyright: unverified.
500 ## $a Copyright notice on video: Jonas Mekas ; 1969.
See also: