2005. Hartwin picks up a diatonic accordeon for the first time. Five years later he roams the international folk stage as a professional musician. Inspired by traditional European music, he has created his own style.

His compositions are the centerpiece of Trio Dhoore, a band of brothers that has been lighting up the folk scene since 2010 and played concerts all over Europe and Canada. But Trio Dhoore's music is also appreciated in Flanders. The song "Endless Dancing" from their latest album 'Momentum' can be heard regularly on Radio 1. In 2017 the brothers performed “main stage" during Dranouter Festival and they made their "entrance" in the Flemish art centers.

His personal life is furthermore intertwined with his musical career: Estbel is a musical marriage between his Flemish roots and his wife Leana’s Estonian background. With the beautiful and magical inviorment of the Island of Saaremaa (Estonia) as there home and inspiration, the band released ‘SAAR’ (Island) by German label Nordic Notes during there showcase at Tallinn Music Week 2017. A fullalbum featering 11 original tracks mixing up influences from folk and indie over pop and electro. Awarded ‘Best newcomer’ during the Estonian Pop Music Awards (2018), Estbel found it’s way to the bigger stages with highlites such as Viljandi folkmusic festival in Estonia, Dranouter Festival in Belgium, Celtic Connections in Scotland, Underneath the stars in England, Kaustinen festival in Finland and Lingköping festival in Sweden.

In 2018 Hartwin published his book ‘Out of the box’ featuring hundred own compositions.

"Hartwin shows how subtle, on the edge of the fragile an accordion can sing."
- Folk Magazine | BE

"Hartwin's tunes are very enjoyable, from the feather-light to the full-on funky!"
- The Living Tradition | UK