Via his Soundcloud:
So I found this beat tape I made (my guess is back in ’01) in my parents’ basement today out in West Hempstead, NY.
I sold one beat on here to Mos Def which was used for his song… Ahhh, just do you homework.
Jay-Z recorded a song to one of the other beats on here as well but I never heard it (still to this day).
The Underground 