Copyrighting NOT = Copywriting Post this in the 'legal issues' section please; that way you'll get better answers.
First of all, you can't copyright a domain name. Second, generally you also can't trademark a domain name if it's essentially just used as an address - there are exceptions (such as if it's the actual official and legal company name - think of things like Amazon.com, which is incorporated under that name). But like you were already told, your question doesn't belong here. Ask in legal issues if you need more information, or go here: http://www.uspto.gov/go/tac/notices/guide299.htm