You do not create a label for the thing that is normal.
That always annoyed me with non-smoking label. But I guess people back then that did not smoke were the minority.
While we are at it, why not also use a Made In Label. I want to discriminate against certain countries, so that I do not put money there, supporting them. What good does it, if you want to support human made art, if it came from chinese sweat shop. And yes, that is what they do for real paintings on canvas. You can google that.
AI made is not quite true term. An AI was used to create it, but this is only half the truth. I dabbled with AI creation. For Stable Diffusion I can tell you, it takes skill and patience to create good stuff. Even with AI there is a human acting. And for human made art, some of the image editor tools feel like cheating, compared to real hand-drawn.
The issue with many AI, Stable Diffusion included, is similar to artists that trace other artists. Or copy other artists style wholesale. This is century old behaviour in arts. And the AI is so dumb, that it even copies watermarks and signatures, if unchecked.