Subwoofer Agte sampled "My Own" by DJ Seduction (1992), which sampled "Chile of the Bass Generation" by Mental Cube (1990), which sampled "The Fuz and da Boog" by Fuzzy Haskins (1976); that sample chain goes twice as long as you suggested, and this is just for the drums (a sort of "broken chain" involves a riff from a different 1970s funk song). Also TIL that that Fuzzy Haskins song is also sampled (directly) in "Diesel Power" and "Funky Shit", and in Fatboy Slim's "Everybody Needs a 303".
