TheAudioDB.com | Music Database and free Music API with High Quality Artwork and Metadata
TheAudioDB is a community music database of Artwork and Metadata with a free Music API.
Databases
Internet Archive: Cover Art Archive
Discogs - Music Database and Marketplace
Discover music on Discogs, the largest online music database. Buy and sell music with collectors in the Marketplace.
MusicBrainz - the open music encyclopedia