Products directly generated by a generative model are not copyrightable in the US. And therefore public domain. Not a lawyer, but I think the cases and commentary have been pretty clear. If you make significant human contribution / arrangement / modification / etc it can be copyrighted.
Long story short, you can't prevent anyone from using AI slop in any way they want. You would have to keep the slop as a trade secret if you want it to remain intellectual property.
"It concludes that the outputs of generative AI can be protected by copyright only where a human author has determined sufficient expressive elements. This can include situations where a human-authored work is perceptible in an AI output, or a human makes creative arrangements or modifications of the output, but not the mere provision of prompts."
Anyone seen clarity anywhere on what that actually means, especially for things like code assistance?
Long story short, you can't prevent anyone from using AI slop in any way they want. You would have to keep the slop as a trade secret if you want it to remain intellectual property.
Jan 29th 2025 clarification from US Copyright Office: https://www.copyright.gov/newsnet/2025/1060.html