[kmeisthax]

The Copyright Office wrote their guidance specifically because someone tried to register a comic book they wrote and put AI art in. They specifically credited Midjourney as co-author.

Their guidance would not apply for someone using AI as a tool, but said copyright would be thinner than if you'd drawn everything by hand. Specifically, you don't own any of the things the AI "just came up with". If you just wrote a prompt and grinded out some results, you probably own nothing[0]. If you use shittons of inpainting to control, say, the overall composition, but the AI filled in pixels somewhere, then you probably still own the overall image, but that's only because I'm not sure how you'd separate the two in a way that would let you copy just the AI-generated portion. Or, in the case of the comic book I mentioned earlier, they own the text, characters, and plot of the comic book, but not the artwork.

[0] Yes, you could probably just lie to the Copyright Office. Make sure to never reveal your use of AI to anyone, because there's loads of angry artists who would love to tattle on you.