Good news: the courts (all the way up to the Supreme Court, which declined the appeal) have upheld the Copyright Office's assertion that their album is public domain and ineligible for copyright protection. Prompts are insufficient human authorship, which is a requirement for copyright to apply.

https://www.reuters.com/legal/government/us-supreme-court-de...

Arguably, this makes sending such an album to a distributor a contractual violation as well, since you must assert that you own the rights to license it to them and are empowering them to collect royalties on your behalf.