Copyright Application Tutorial
The American Society of Media Photographers has posted a great tutorial on applying for a copyright on your photographs. Apparently the Copyright office now accepts CDs containing multiple images with your application. This makes it much easier now to apply for a copyright. There is one few per CD.
Even though you have full copyright to your photographs (unless you sign that away of course), sending in a copyright application will give you the ammunition you need in case you ever have to go to court over infringement of your copyrights.
Enjoy.
Michael