MusicBrainz is a user-maintained community music metadatabase...artist names, release titles, tracklist...Its web site is the interface which allows the creation and maintenance of the data, all user-contributed and user-maintained. This means that if you
D. Donato, F. Bonchi, T. Chi, and Y. Maarek. Proceedings of the 19th international conference on World wide web, page 321--330. New York, NY, USA, ACM, (2010)
K. McNally, M. O'Mahony, B. Smyth, M. Coyle, and P. Briggs. Proceedings of the 15th international conference on Intelligent user interfaces, page 179--188. New York, NY, USA, ACM, (2010)
N. Lele, L. Wu, R. Akavipat, and F. Menczer. HT '09: Proceedings of the Twentieth ACM Conference on Hypertext and Hypermedia, New York, NY, USA, ACM, (July 2009)
B. Smyth, P. Briggs, M. Coyle, and M. O’Mahony. User Modeling, Adaptation, and Personalization, volume 5535 of Lecture Notes in Computer Science, Springer, Berlin/Heidelberg, (2009)