There are lots of way to do watermarks and there are some actions/scripts that can do batches of photos. Below is a sample of three different styles:
Top one is just plain black text - not very appealing
middle one is the same black text, but the opacity is lowered.
Bottom one is the black text again, but the fill opacity is set to 0, and a bevel and emboss has been applied, so all you see is that effect.
As far as the copyright symbol, on Win you hold down the alt key and type 0169 ON THE KEYPAD, NOT THE NUMBERS AT THE TOP. You can also cut and paste it from the web.
