The U.S. Copyright Office's Catalog of Copyright Entries consists of 645 volumes spanning the period from 1891-1978, and cover all classes of works and all renewals. The CCE is now available online here.
The 1978 volumes contain entries for pre-1978 registrations that were not complete at the time of publication of the 1977 CCEs. These entries appear in a separate section at the end of each volume.