To find out what projects he has been in, you can try the following:
* Search for him on IMDb: The Internet Movie Database (IMDb) is a great resource for finding information about actors, directors, and movies. Search for "Jasper Dreesen" on IMDb.
* Check his social media: If Jasper Dreesen is active on social media, his profiles may mention his work.
* Contact a Dutch film database: There may be a Dutch film database or website that lists actors and their projects.
Please note that it's possible he may not have been in many projects yet, or that he has not made his name public.