rostasi discovered this and we've been discussing it today. There's a very explicit extract from On The Corner that keep popping up throughout this, and at first I thought it was a case of Lalo Schifrin replicating the riff and having it played for his own sountrack sessions, but Rod is adamant that no, it's an actual sample from OTC that was put on a tape loop and then incorporated into the final ST segment.
At first I was skeptical, seems like a lot of work for a TV soundtrack in 1975, but the more I listen, and the more he breaks it down into little samples and loops them so that specific, isolated comparisons are possible, Miles vs Lalo...I think I'm convinced, probably. Lalo was doing a Teo on Teo!
So much for nobody paying attention to OTC until decades later!