The physical vs non-physical aspect makes it more complex, but I think the situation is ultimately the same..(?) A painter like a musician can keep and pass down a physical representation of the original image (a canvas vs a gold disc/master) but the rights to the image/song itself can enter public domain and be reproduced (a print vs an MP3).

It's kinda interesting to me that in art the physical object is revered above the image itself, whereas I can't imagine there are many people who spend millions on gold discs or masters of culturally significant songs.