Shkreli, who is currently serving a seven-year prison sentence, purchased the only known copy of the record in 2015

'Once Upon A Time In Shaolin' took the hip hop group six years to produce and comes in a handmade silver case with a leather-bound book 

Styles P, Talib Kweli, Pharoahe Monch, Mysonne, and Public Enemy's Chuck D all feature on the track

The group have given rare approval for their music to be used in an advertising campaign

The rapper also discussed the forthcoming U.S. election

He made the remarks on The Tonight Show

They first formed as the production duo back in 1994

Fans of the bass artist have been asked where he should play

The incident occured in June

The MSG Sphere would hold 21,500 people...