I don't understand your point. The whistleblower didn't "prove" it either. There is already enough publicly-visible info for copyright holders to sue OpenAI e

I don't understand your point. The whistleblower didn't "prove" it either. There is already enough publicly-visible info for copyright holders to sue OpenAI even without the whistleblower. And when a judge allows the civil suit to proceed then the internal documents will come out during discovery, even without the whistleblower. So, yeah the whistleblower lends more weight to the argument, but there was already enough to go on even without him.