[mercora]

I wonder if it is really needed to make a copyright claim. And even if so, wouldn't it make more sense to date it to its creation? If i am not mistaken, the duration until it would be invalidated is also based on the date of publishing it. Or some date after your death.

[zik]

The Berne copyright convention states that all content is copyright by default - so no, there's no need to include a copyright claim on anything if all you want to do is make sure you're covered.