#art piracy

Fellow artists & art appreciators/ patrons:

If an artist provides a service such as painting on a thing for a certain fee, but what this person paints are almost all copies of other artists’ works (including and almost exclusively famous artists who are no longer living but who have foundations or estates that manage the copyrights/ licenses for the artists’ oeuvre)—

I mean, this is art forgery/ piracy, right? And the fact that this artist continuously profits from these custom paint jobs, and somehow no one in that community he’s in seems to be calling this out (they keep ordering from him, even).. and i mean it’s not *exactly* a carbon copy of the works, but the colors and subject matter are the same, only cropped or not as detailed, and the pieces are named after the original pieces too and he is marketing them under the original artist+artwork’s name

It just doesn’t sit right with me and I don’t think I can just let it slide. What do I even do next? Report this person? Are there any legal grounds for this? Do I contact the artists’ estates?

Input, advice, reactions, ideas etc appreciated

Also, if the works have become public domain, what’s the rule on that? Does it apply here?