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OpenAI now tries to hide that ChatGPT was trained on copyrighted books, including J.K. Rowling's Harry Potter series
(www.businessinsider.com)
This is a most excellent place for technology news and articles.
The powers that be have done a great job convincing the layperson that copyright is about protecting artists and not publishers. It's historically inaccurate and you can discover that copyright law was pushed by publishers who did not want authors keeping second hand manuscripts of works they sold to publishing companies.
Additional reading: https://en.m.wikipedia.org/wiki/Statute_of_Anne