Yeah, that's an old trick for proof of time, though you'll only need it to sue or defend from a lawsuit. By the way, you can write (c) [your name/organization] on any piece of work without a publisher or anything of that sort to protect yourself. Copy writing is technically free, its licensing, trademarking, publishing, and patenting that costs money.

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Don't frown at your feet,
And give in to strife.
Hold your head high,
It's a wonderful life.