What if black hat puts his name over the actual artist's names on the paintings (like he writes his name on a piece of tape or something and sticks it over the original signature?)
Ah you have a good point there Anon! He is a villain so he’s not above art theft, I’m pretty sure right after an artist finished painting him Black Hat just slaps his name on it and walks away leaving the artist terrified and unable to do anything.
But keep in mind, he is pretty narcissistic and has appeared to live for quite a long time, so it wouldn’t be shocking to know he has more than a few skills up his sleeves. But still I kinda like your idea a bit more Anon