Finding Similar Artists with the Amazon Product API

I'm relatively new to the Amazon Product API and I am attempting to pull back similar artists to the artist on an item I am providing for the Similarity Lookup.

For instance using the f开发者_运维技巧ollowing parameters:

• ItemId='B00136JMX6'
• Operation='SimilarityLookup'
• ResponseGroup='ItemAttributes,Images'
• Availability='Available'
• SearchIndex='MP3Downloads'

I receive only other songs by Johnny Cash.

Is there a way to find other artists similar to Mr. Cash?

I've spent a lot of time working with both APIs and yes it is easy to get five similar artists from Last.fm then you could search based on those artists. You could perhaps use MusicBrainz... They also make use of ASIN numbers in their database. I don't make use of MusicBrainz much but it is another option I looked at.

Good luck!

My code in PHP for working with these APIs