Schantz was raised in Kalundborg, where he startet playing classical piano at the age of 6 years but eventually had motivation problems in early adolescence. While getting a new and inspiring teacher, he got back motivation and was introduced to jazz. He was quickly inspired by bands and musicians like Weather Report, Miles Davis, McCoy Tyner, Chick Corea, David Sanborn and Herbie Hancock.
Schantz formed his first trio as band leader in 1997, and they got the opportunity to play gigs at local clubs and released their first demo album Cantaloupe Island, the year after.
In July 2015 his own band Godspeed debuted at the Copenhagen Jazz Festival venue Huset, Musikcaféen in Copenhagen, Denmark. The band is a trio including with Marius Neset and Anton Eger.
2005: Young Nordic Jazz Comets, within the band JazzKamikaze.