The copyright thing is kind of a big misconception. Anything created by anyone is technically copyrighted, but that doesn't mean much. Having raw files or design files is the only way you can prove it's yours, and even then, good luck doing something about the stolen image unless it was stolen by a company in your country and used for gain, or posted on a legitimate website that will take it down once you can prove it's yours... and in both of those situations, having the copyright doesn't legally do anything or help you. The only time adding a legal mark will help you is if you've paid to register something with a trademark.
Here is mine, the simple type "caslux".
It's not 100% finalized. I have yet to watermark any photo Ive taken. I may do something different with the C, but my thinking is:
I do branding/identity design every day, so part of my motivation was to NOT do what I'd normally do that clients normally expect... no monogram, no conceptual icon... just a simple font thats only unique enough to separate itself from the most common slab fonts but no extra, unecessary elements. Basically the extreme of what I preach to clients. Clients think minimal means they are getting less for their money, usually. The work becomes presenting the logo.. so this kind of just helps my argument for simplicity and lets me demonstrate the flexibility of having a minimal logo.
In use, the logo will be used alongside photos and graphic design. Keeping the type this simple (and greyscale), lets the logo remain non-distractive to the subject, and works regardless of the theme/tone/color palette of the subject. It can also be incorporated easily with other elements