Sebastian Hasenknopf was most likely born in Salzburg. Like Johannes Stomius and Kaspar Glanner he was influenced by the new ideas of reformation.

He was composer, singer and organist. In 1588 his collection "Sacrae Cantiones" was edited in Munich, containing various sacred works (Antiphones, a Hymn, Motets, Psalms). This collection was dedicated to Johann and Christoph (1506-1558) Weitmoser, two brothers engaged in gold and silver mining in the Gastein and Rauris valley, and prominent followers of reformatoric ideas.

Sebastian Hasenknopf was choir boy and choir singer at the Salzburg cathedral. His tries to get an employment at a protestant school, led him via Linz, Graz and Innsbruck back to Salzburg without any result.

In 1597 he can be found as school master and organist in Goldegg (Pongau/Salzburg province).