What license are the generated images under?
Could you release them under creative commons?
"To qualify as a work of 'authorship' a work must be created by a human being": https://www.copyright.gov/comp3/chap300/ch300-copyrightable-... [PDF], see section 313.2 "Works that lack human authorship"
Monkey selfie case: https://en.wikipedia.org/wiki/Monkey_selfie_copyright_disput...
Copyright is (read the law!) a temporary monopoly granted for works meeting certain criteria, being creative is one of them. You’d hold copyright for the code you wrote to generate the “art”. If you download somebody else’s code (as this site uses Nvidia’s), you lack the creative element.
>>> On 23 April, the court issued its ruling in favor of Slater, finding that animals have no legal authority to hold copyright claims [1]
[1] https://petapixel.com/2018/04/24/photographer-wins-monkey-se...