Not sure I'd go that far, but it's certainly an argument for CC-BY over CC0. With CC-BY they must credit you, and you can then either trivially prove your owner

Not sure I'd go that far, but it's certainly an argument for CC-BY over CC0. With CC-BY they must credit you, and you can then either trivially prove your ownership of the work, or demonstrate copyright infringement (if they have violated the license).