They are shown on the top left of the screen in-game when they begin to play. Note that these tracks will be replaced with a new soundtrack soon.

Here are the names of the tracks in the game currently:
Alen Skanner - Electronica
GEDEON - Void
Peyruis - HustleTHE Williver - Body
Unholy - 20202020[http//%3D+https]
Vondkreistan - Accent Evolution[http//%3D+https]
Vondkreistan - Saint Schambles (Original Mix)

I have no idea why Steam is flagging some of these Youtube links as malicious, but you can just search for those on Youtube.