Script-Fu -> Copyright Text

This is an adjustable script,
it adds copyright information to the photo.

Script-FU > Photo > Copyright Text

BTW: The COPYRIGHT symbol is included with my name in the defaults for the script.
Just backspace out my name and put in what you neecd to...
And if you need to use a copyright symbol anytime while in the GIMP,
Press Ctr+Shift+u
(an underlined "u" will appear)
Then type a9 and press the ENTER key.

That little trick works in most operating systems (tested on Windows 8.1 and Absolute Linux just today :-)type a9 and press enter

;  This script should be placed 
;  in the user or system-wide script folder.
;
;  Windows Vista/7/8/10)
;  C:\Program Files\GIMP 2\share\gimp\2.0\scripts
;  or
;  C:\Users\YOUR-NAME\.gimp-2.8\scripts
; 
;  Windows XP
;  C:\Program Files\GIMP 2\share\gimp\2.0\scripts
;  or
;  C:\Documents and Settings\yourname\.gimp-2.8\scripts   
; 
;  Linux
;  /home/yourname/.gimp-2.8/scripts  
;