Protecting your work on multi-author blog site
I'm looking for some advice on best methods of using copyright on a multi-blog site. Basically, I'm working with a team to set up a local musicians' news site that will have 6+ bloggers on it. One of the bloggers has brought up the concern of making sure her work is copyrighted, and while I want to make sure everyone is protected, I am just looking for the best method. For instance, the Verge here, which is blogged the same way my site would be, does not have "Copyright C 2012 Joshua Topolsky" at the end of each of his articles, even though I assume he owns the rights to them?
Does anyone here have experience with doing anything like this, or know the proper sites where I could gain more information?