This is very well done, though I think the results could be better organized. For example, if I enter the opening riff to Bullet Hole by The Haunted (http://bit.ly/1bnTBFg), it first lists two songs that have similar riffs, whereas the The Haunted track is listed third even though it is identical to what I entered.

Also, even though the bitly link ends up being the exact same URL, it sometimes adds a bunch more erroneous results prior to The Haunted, making it listed 8th. But clicking the search button will again return it as the 3rd result.