Registration & Marking
Formal registration of a work is not required as copyright protection arises automatically on fixation of the original work. That being said, copyright registration is relatively inexpensive and allows certain legal advantages. Registration serves as notice to the public that copyright exists in the work, which is a prerequisite to the legal remedy of damages. Registration also eases the burden of showing ownership of copyright, and can function as evidence in court that copyright exists.
There is also no obligation to include a copyright notice (©) on material protected by copyright in order to enjoy copyright protection. However, a copyright notice can be useful because it notifies the public to the existence of copyright in the work and creates a presumption of ownership similar to that described for registration above.