Under current U.S. copyright laws, a work receives copyright protection automatically when it is fixed into a tangible form. Currently, copyright registration and notice of copyright are not conditions to copyright protection. Marking, however, may obviate an innocent infringer's defense, and registration has the benefit that the copyright owner may seek attorney's fees and statutory damages in court if the work is registered within three months of publishing or prior to the infringement. Otherwise, the copyright owner must prove loss or the infringer's profit, something that may require accountants and other expenses.
The copyright symbol, or copyright sign, ©, is the symbol used in copyright notices for works other than sound recordings (which are indicated with the circle P symbol). Use of the symbol is not conditioned upon registration.