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I don't think anything exactly like you want exists. The closest I can think of are private Bittorrent trackers. A popular open source implementation would be e.g. UNIT3D.
If you're looking for something like MusicBrainz does that mean their GPLv2 license doesn't work for you for some reason?
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a more popular project.