Do I have to list inherited foreign royalty payments (my fathers intellectual property from music) on my tax return? The yearly amount is usually between $200 - $400.

The royalty payments are from Germany and I was under the impression that the German intellectual property agency (GEMA) automatically deducts the taxes but my brother told me that that's not the case. I filed form 6166 and had my tax documents sent directly to the agency for certification of my US tax residency. Thank you for your help!