You don't need one. Both Spotify and Rdio have ISRCs for their tracks (they got those from the same source), so they can resolve all those cases based on ISRC equality only. How they (or was it Facebook) managed to fail the described cases is beyond me.
As someone who implemented metadata matching of two distinct musical catalogs:
First you do search, then you do ranking, then you take the best result.
You need to take all the needle metadata (isrc, albums' upc/icpn, title, version, album, artists), and then
- If there are results with the same ISRC, it's cool. Choose the best matching album (by UPC, then by title, then by album version)
- If there aren't, match the track + artist pair and then choose the best matching album for it.
- If you don't have ISRC match and can not match on track title + artist, you should probably bail out.
This way you both won't miss a track in compilation, neither would you prefer The Hit Crew to the actual good performer.
Most international content has ISRC. Local, independent and DIY would probably not. But it's usually easier to match because it doesn't have dozens of different recordings for tracks nor endless realms of compilations.
As someone who implemented metadata matching of two distinct musical catalogs: First you do search, then you do ranking, then you take the best result. You need to take all the needle metadata (isrc, albums' upc/icpn, title, version, album, artists), and then
- If there are results with the same ISRC, it's cool. Choose the best matching album (by UPC, then by title, then by album version)
- If there aren't, match the track + artist pair and then choose the best matching album for it.
- If you don't have ISRC match and can not match on track title + artist, you should probably bail out.
This way you both won't miss a track in compilation, neither would you prefer The Hit Crew to the actual good performer.
Most international content has ISRC. Local, independent and DIY would probably not. But it's usually easier to match because it doesn't have dozens of different recordings for tracks nor endless realms of compilations.