@nous I figure a judge wouldn't count prompts because they are basically commissions. If you commission an artist to create a piece for you, it's still their piece. If a corporation commissions the artist to create the piece, they can own it as work-for-hire, which is EXACTLY what Thaler was trying to claim in this case, but they aren't the creator.
If you can replace "AI" with "Professional Artist" and you wouldn't be eligible for your amount of input, then it's not copyrightable.