For those of you that might be interested in the rules and how-to's of copyrighting your song should check out web site http://lcweb.loc.gov/copyright/circs/circ01.html#pon>;
How do you get the phonorecording copyright symbol? It's just like the "C" inside the circle, only the letter is "P".
In most standard fonts, the copyright symbol can be typed by holding the ALT key, then typing 0169 using the numeric keypad.
A handy tool for finding the ALT codes for other characters, or double-clicking to copy selected characters to the clipboard (from whence you can Paste or CNTL-V into your application), is charmap.exe (Character Map) which ships with Windows. (If you didn't install it when originally setting up Windows, you can add it with Control Panel | Add/Remove Programs | Windows Setup tab | Accessories).
Oops.. read too quickly. I don't know how to get that P inside a circle character, unless you go looking for it in a custom font or add it yourself using a font editor (not a casual operation).
If I'm not mistaken, the usual C copyright symbol is quite universally accepted for the assertion of copyright on any intellectual property.
Actually, Fred, I believe that circle-C does not have the legal force of the word "copyright" even though we know what circle-C means. But under current U.S. law (I do not know about international law), the copyright exists whether or not it is labeled.
One thing you could try that would not work in NWC, but in Word would be to type an "O" in a bigger font, select it, set the spacing really high so that it's practically overstrike (I forget how, but it's in the font window somewhere...) and type a "P" in a smaller font.