In 2007 Bosgraaf, under the supervision of musicologist Thiemo Wind, released a 3-CD-box with compositions of the Dutch composer Jacob van Eyck (1589–1657), a collection which attained unexpected commercial success and sold more than 25,000 copies.

In the 2011–12 season he was nominated by Concertgebouw Amsterdam and the Centre for Fine Arts, Brussels, on behalf of the German ECHO music award organisation, to take part in the Rising Stars series for a tour of the most important concert halls in Europe.

In 2005 Bosgraaf, guitarist Izhar Elias and Italian harpsichord player Alessandro Pianu founded the ensemble Cordevento.

[2] The trio at first focused mainly on 17th-century music, then, under the same name Cordevento, the ensemble from 2008 also works as a small baroque orchestra in single strength.

Bosgraaf made a transcription of Pierre Boulez' Dialogue de l'ombre double which was authorized by the composer.