chr1z··on Show HN: Wavo.me - A social network for music to take on Spotify and iTunes.After sharing on Twitter it suggests me to follow @https http://d.pr/i/dyHM
chr1z··on Ask HN: Social music sharingDo you know http://8tracks.com ? Because it sounds a lot like what you are describing. You may find the answer to your question in their Licensing page.