Hi there,
Could you give me an idea of how often you update the content from Deezer?
If I search the foreign track id for "Coldplay - Ink" (released in May 2014), I get no result for Deezer: http://developer.echonest.com/api/v4/song/search?api_key=HKXJKFBBX1S0IERDE&format=json&results=1&artist=coldplay&title=ink&bucket=id:deezer&bucket=tracks&limit=true
While I get some for Spotify: http://developer.echonest.com/api/v4/song/search?api_key=HKXJKFBBX1S0IERDE&format=json&results=1&artist=coldplay&title=ink&bucket=id:spotify&bucket=tracks&limit=true
Thanks for your feedback.
Best, Florian