this is a good question, and I wonder if its even open to the public. My limited knowledge knows that Anthropic settled a lawsuit of I believe ~1.3billion for scanned textbooks if I'm not mistaken.
Since the leadership is obviously not going to say anything factually true or psychologically honest, I wonder if anyone has tried invoking some aspect of corporate or constitutional law, given their legal status (as nonprofit that controls a PBC) to force such disclosures.