I don't know about that. I have certainly licensed multiple images in the UK under Rights Managed contracts and I didn't register anything with anyone. I've done some Royalty free stuff under special circumstances as well but that was in a different country.
Originally Posted by jnanian
So you are saying if you can prove it is your photograph and someone appropriated it for their own commercial purposes you don't have a leg to stand on if you didn't register your copyright?!
That would mean any commercial processing lab could just look through your negatives and chromes and cherry pick out the ones they like and start licensing them for advertising. I really don't think that's the way it works.