The three major legal databases each have a specific page dedicated to Copyright Law or Intellectual Property. These Practice Area Collections pull together all of the secondary sources and primary law available in each database. This can be a great starting point.
Copyright regulations are located in Title 37, Chapter II, of the Code of Federal Regulations.
Copies of the copyright regulations can also be found in the following sources:
When a copyright registration application is submitted to the U.S. Copyright Office, it is reviewed by an examiner, who determines whether the application meets the requirements for federal registration. If the office refuses to register a copyright, the applicant can make an appeal to the examining division, and then a second appeal to the Board of Appeals of the Copyright Office.
The decisions of the Board of Appeals are available at the Univ. of New Hampshire IP Mall website, with coverage from 1995 to present.