In February 2007 (the same year the record label was founded), Cartoon Network teamed up with the independent hip-hoplabelDefinitive Jux to produce an animated video for El-P's track "Flyentology" and release a compilation album titled Definitive Swim for free download, featuring tracks from most of the label's artists.
In October 2015, DeMarco mentioned on his Ask.fm page that Williams Street Records would no longer put out any more albums for sale, and would only release free music.[2]