Just re-watched this movie the other day and was digging on the Roy Ayers soundtrack.
Pianist Larry Willis recorded this blues a few times in his career, but the first version I know of is on Junior Cook’s Something’s Cookin’ album.
Here’s a transcription I did a while back of Israel Crosby’s bassline on Cheek to Cheek, from Ahmad Jamal’s Ahmad’s Blues album. This trio is famous for playing tight arrangements, and many of them feature a balance of busy rhythmic figures and moments of sparse piano accompaniment that leave space for the bass to shine through. Although Crosby is more than capable of improvising basslines that sound like written melodies, he probably honed this line into a finished product over dozens of live performances to a point where there may be no improvisation at all here.