Free online copyright

[Adhdgfx]

What does everyone think of them free copyrighting sites? I'm not very familiar with American law but I know these protect under UK (sites claim to protect under US)

Things such as MyOws (Original Works)

It has some cool features too like helping you get designs of yours taken down and such, rather interesting website if I say so myself.

Has anyone used something like this to protect their work?