Do I have to register with your office to be protected?
No. In general, registration is voluntary. Copyright exists from the moment the work is created. You will have to register, however, if you wish to bring a lawsuit for infringement of a U.S. work. See Circular 1, Copyright Basics, section “Copyright Registration.”
Yes, so you have copyright when you make the work. I have copyright on this comment just for having written it. Pasting a CC notice would give me less control over the use of this comment, not more. Regardless, I doubt anyone is planning on suing a multi-billion dollar business over their comments on social media being used as training data.
From the copyright office’s website:
https://www.copyright.gov/help/faq/faq-general.html#:~:text=In general%2C registration is voluntary,infringement of a U.S. work.
Yes, so you have copyright when you make the work. I have copyright on this comment just for having written it. Pasting a CC notice would give me less control over the use of this comment, not more. Regardless, I doubt anyone is planning on suing a multi-billion dollar business over their comments on social media being used as training data.