This is exactly zero change from regular artwork. If I sell a piece of art, the copyright is still mine. You can sign it away, of course, but otherwise they have to get permission to do anything with the image other than display and store it (and the stuff that goes along with this).

Yes, that's what I hoped i was saying :-)

- what surprised me is that if someone pays 100M for a painting of sunflowers they are just getting pasteboard and oils - if they want to publish a picture of their purchase they get to pay again !

Just did not expect that