Only if the copyright is not part of the copyright registration that is copyrighted in the publication of the author's registration. But If the copyright is part of the copyright registration that is copyrighted in the publication then the copyrighted author of which publicized the copyrighted registration is not copyrighted in the legalized sense of which a publication is copyrighted.

Yes, a work is always copyrighted, before and after editing and both versions.

Forms for copyright registration are available at the link below. Bear in mind registration is not required for protection.

There are several copyright registration offices located in various parts of Nebraska. You can also get software that will show you step by step how to file a copyright in Nebraska.

Registration is not required for protection, and is not available in some countries. Visit the website of the copyright office for your country to see if registration is available. If it is through the copyright office directly, their web site will supply explicit directions and forms; if it is through a private registration system, the copyright office will provide links.

In the most technical sense, no registration is required, but the further along you are in the process, the easier it will be to prove ownership.