1. Photo Attorney - I’ve heard Carolyn write talk about copyright issues in Las Vegas a couple years ago during a photography conference. You should be lucky if you have the opportunity to listen to her talk. She gives a fresh perspective too since she is a photographer as well. She likes to photograph nature photograph primarily. If you’re in a bind yourself with a copyright issue be sure to call her. Her blog is additionally an awesome resource to keeping up to date with copyright issues in America currently.
2. Copyright.gov - If you’re a photographer this should be your best friend. The federal government website is surprisingly very helpful in outlining in laymens terms what is protected by the copyright.
3. Kodak’s Copyright guide - This one I took from Detroit Photographer, Blake Discher’s website. He provides this useful resource from Kodak which outlines in simple questions about typical concerns about copyright related issues.
4. EditorialPhoto.com - Editorialphoto.com outlines a plethora of links and resources to websites and information related to copyright issues as well for photographers. If you’re looking to do more research yourself this would be the best place to stop after visiting the copyright websites above.
5. FormVA - This should be your favorite pdf. This pdf outlines how to register your works with the Federal copyright office.

Remember all the following are not suggested to be used as legal advice. If you have a serious problem or question about intellectual property rights please contact a lawyer specializing in intellectual property rights law.