You can write a "Copyright Notice" into your images' metadata with an image editor like Adobe Photoshop. Most image editing and viewing programs today can read that data, so people viewing your images will know your image is copyrighted and you mean business when it comes to protecting your creative property.

In Adobe Photoshop, you can do this by first opening the file you want to write the "Copyright Notice" to and then go to the "File" menu and scroll down and select "File Info."



You will now see the following dialog box. Make sure "Description" is highlighted in the upper-left corner. Then scroll down to where the arrow in the screen shot below is and select "Copyrighted" in the "Copyright Status" field and then type in your Copyright Notice in the "Copyright Notice" field. You may also type in a URL with Copyright Info in the "Copyright Info URL" field.



Now, with your Copyright Notice written to your image's metadata, you probably want to save that, so go to the "File" menu and scroll down to "Save" to save your work.