If you are looking for a simple photoshop action try this.
Creating a copyright Action in PhotoShop
1. Click "Create New Set" in the Action panel
2. Name the action: Copyrights
3. Click "Create New Action"
4. Name this according to the photographer and what color text you are using i.e. Jan A. Allinder [white]
5. Open the image
6. Verify the image is rotated properly and is the correct image size.
7. Start Recording your Action
8. Select the Text tool, font, font size & font color (in this example - white)
9. Click anywhere on the image and enter your copyright
(Copyright Symbol: PC Users - ALT+0169 -> use numeric keypad; MAC Users - OPTION + G) i.e. © Jan A. Allinder
10. Choose Select > All
11. Choose Layer > Align to Selection > Bottom Edges
12. Choose Layer > Align to Selection > Right Edges
13. Choose Select > Deselect
14. Select the Move tool (Make sure the Type layer is selected)
15. Holding down the Shift key and using the arrow buttons, click on the Left arrow twice and the Up arrow twice
16. Depending upon how you would like to save your image...
• If you would like to save the image with layers, chose File>Save & click save. This will save your image as a PhotoShop (PSD) image in the same directory as the original image
• If you would like to save your image as a JPG image, chose Layer>Flatten Image and then choose File>Save. NOTE: This will overwrite your original JPG image
• If you would like to save your image for the web, chose File>Save for Web. NOTE: With this option, when you run in batch mode, you'll be prompted to enter a file name for each and every image
17. Stop Recording your Action.