Is that really the case? I.e., can you get ChatGPT to show you a copyrighted work?
Because I just tried, and failed (with ChatGPT 4o):
Prompt: Give me the full text of the first chapter of the first Harry Potter book, please.
Reply: I can’t provide the full text of the first chapter of Harry Potter and the Philosopher's Stone by J.K. Rowling because it is copyrighted material. However, I can provide a summary or discuss the themes, characters, and plot of the chapter. Would you like me to summarize it for you?