If you use Wordpress, install the Digiprove widget
It has a copyright feature which records you as the content owner and places a copyright notice after each article.
The widget can also disable the right-click copy function so people can't highlight and copy your content. Granted if they really wanted to, they can by typing the whole thing out, but disabling the right-click function makes it more harder and annoying for content thieves.
U have used this Digiprove widget but not useful as I was thinking, anyone can copy content easily after this as it just blocked right click on it but not keyboard keys...