There are at least three bands on last.fm to have recorded under the name of Hearts of Darkness. 1. An afrobeat big band formed in Kansas City, MO in 2007 and released their debut record "Hearts of Darkness" in 2010. Free tracks can be downloaded at their website. 2. Dream Doom from Amsterdam. A project from 2007 by members of Mühr which was released through Bandcamp in 2011. 3) A Hip Hop crew from Hull City, North Yorkshire.