I propose that ccMixter.org be added to the whitelist for other databases.

This website is similar to the already whitelisted whosampled.com but with more of a focus on Creative Commons licensed remixes. The site contains individual instrument recordings (Samples), individual vocal recordings (Acapellas) and the resultant Remixes (which we would refer to as Recordings here in the MusicBrainz database), providing a family tree of subsequent remixes based on their predecessor remixes.

A lot of the music which I am cataloguing from Jamendo originated on ccMixter, or was a remix of a recording which itself originated on ccMixter. I have been adding some ccMixter URLs already to MusicBrainz as Social Media links, but I think this is a poor description for these links. It would be better if they were classified as Other Database links, IMHO.