> n those cases, it seems like not such a leap to say that the AI has obviously seen that artist’s work and that the output is a derivative work.
"Copying" a style is not a derivative work:
> Why isn't style protected by copyright? Well for one thing, there's some case law telling us it isn't. In Steinberg v. Columbia Pictures, the court stated that style is merely one ingredient of expression and for there to be infringement, there has to be substantial similarity between the original work and the new, purportedly infringing, work. In Dave Grossman Designs v. Bortin, the court said that:
> "The law of copyright is clear that only specific expressions of an idea may be copyrighted, that other parties may copy that idea, but that other parties may not copy that specific expression of the idea or portions thereof. For example, Picasso may be entitled to a copyright on his portrait of three women painted in his Cubist motif. Any artist, however, may paint a picture of any subject in the Cubist motif, including a portrait of three women, and not violate Picasso's copyright so long as the second artist does not substantially copy Picasso's specific expression of his idea."
"Copying" a style is not a derivative work:
> Why isn't style protected by copyright? Well for one thing, there's some case law telling us it isn't. In Steinberg v. Columbia Pictures, the court stated that style is merely one ingredient of expression and for there to be infringement, there has to be substantial similarity between the original work and the new, purportedly infringing, work. In Dave Grossman Designs v. Bortin, the court said that:
> "The law of copyright is clear that only specific expressions of an idea may be copyrighted, that other parties may copy that idea, but that other parties may not copy that specific expression of the idea or portions thereof. For example, Picasso may be entitled to a copyright on his portrait of three women painted in his Cubist motif. Any artist, however, may paint a picture of any subject in the Cubist motif, including a portrait of three women, and not violate Picasso's copyright so long as the second artist does not substantially copy Picasso's specific expression of his idea."
https://www.thelegalartist.com/blog/you-cant-copyright-style