There are 3 artists named Notch.
1) NOTCH is a Reggae/Dancehall/ Reggaeton artist who released the album The Feeling, featuring the single "I Wanna Kool You". http://www.rockfort.com/
2) Notch were an electronic band from Gothenburg (formed in 1994/95), Sweden with Johannes Hedberg, Daniel Ringström, Mikael Lindqvist of bands such as Carbon Based Lifeforms, DigiDroids and Thermostatic.
3.Notch (UK) is an alternative/synthpop/experimental artist in London who has written solo material since the mid-80s and has been invoved in various projects under names such as Trisexual,Nexus,Nippon Death and This Aching Body.He was also the organ/keyboard player in the London post-punk band Seizure, throughout the 90s.
His songs are available here as Notch (UK)
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From Wikipedia:Norman Howell (born May 11, 1973, Hartford, Connecticut), better known as Notch is a R&B, reggae, dancehall and reggaeton artist. He was the former lead vocalist and one of the creative force behind the hip hop-reggae act, Born Jamericans.
He has been featured on hit albums such as Mas Flow 2, Mas Flow 2.5, Chosen Few II: El Documental, Barrio Fino, and The Cosmic Game. His first solo album, Raised By the People was released in May 2007.