You have to register to sue, but you have the copyright automatically at the moment the work is created. You can go register after an infringement and still su

You have to register to sue, but you have the copyright automatically at the moment the work is created. You can go register after an infringement and still sue, but you then won't be able to get statutory damages or attorney's fees. Statutory damages are a big deal in general but especially here where proving how much of OpenAI's revenue is due to your specific articles is probably impossible. Which is why they're suing under this DMCA provision: it's not an infringement suit so the registration requirement doesn't apply, and there's a separate statutory damages provision for it.