I see what you mean about GPT returning copies. But is there really a difference if your model just happens to 'calculate' an exact copy instead?

For example, if you enter in something simple and high profile, what it returns looks pretty close to an existing work...

Try, for example, typing in "Banksy", "Brad Pitt" or "Starbucks".

So if you type in "Photo of a Coffee", "Impressionist painting of a fruit bowl" or "Blue canvas with one red line in the middle", how do you guarantee that the image you get back isn't actually a copy of someone's work?