If you know of a confirmed source for a song that is not on the list then please post the link & help out. I will keep this post updated in the future.
Confirmed Dr Dre Detox tracks you can find on Spotify.
The Setup feat Obie Trice & Nate Dogg Where I'm From feat The Game Here We Go Again (Compton Niggaz) feat The Game.
Some of the tracks were finished for the detox album while others were intended to be used on Detox but gifted away to other artists projects. There are a lot of "Detox" bootlegs and mixtape on there that have songs that Dre happened to work on after his album 2001 and I just wanted to make a list of songs that were at one point confirmed to be on detox over the past 14 years with citing/reference for those tracks. There is also a slew of confirmed tracks that Spotify does not have and those are not mentioned unless they appear on Spotify in the future.
Kush feat Snoop & Akon I Need A Doctor feat Eminem & Skylar Grey This is Detox (Detoxify) feat TI & Kobe Topless feat TI & Nas (there is a second version with Eminem & Nas) Could Have Been You feat 50 Cent R Kelly (original version features bishop Lamont) https://en.m.wikipedia.org/wiki/Detox_(album)
This is the definitive list of CONFIRMED intended releases for the Dr Dre Detox album that can be found on Spotify. Detox was first announced back in 2002 By Dr Dre and went through many changes. http://www.mtv.com/news/1453255/dr-dres-final-album-will-be-hip-hop-musical/