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MusicBrainz is a MetaBrainz project that aims to create a collaborative music database that is similar to the freedb project. MusicBrainz was founded in response to the restrictions placed on the Compact Disc Database, a database for software... Wikipedia
Content license: Part Creative Commons Zero (open data) and part CC BY-NC-SA (not open); commercial licensing available
Owner: MetaBrainz Foundation
Written in: Perl with PostgreSQL database