There's another thing in play here. If the concerning artist should ever demand that you withdraw your image of his artwork, I think he has every right to do so, even if you did mention his name, and even if you took the shot in a public place. Another, different example to think about: a Belgian political party used a promotional poster with a photograph of a woman. The photo was bought, completely legally, from an American stock photo agency. It turns out to be that the woman portrayed is actually Belgian, and she doesn't want to be associated with that particular political party, nor does the photographer. Together they made a lawcase against the party, and won... the party has to remove and destroy every single poster they used. I could mention that the political party is known to be rightwing and racist, but I don't think that makes a difference in this case.

We do not see things as they are. ǝɹɐ ǝʍ sɐ sƃuıɥʇ ǝǝs ǝʍ