The U.S. Copyright Office is closed, and www.copyright.gov is not available due to the federal government shutdown effective 12:01 amET, Tuesday, October 1, 2013. The Public Information Office and the Technical Support Desk of the Copyright Office are also closed.
If you would like to file a copyright registration online, select the “Continue to eCO” button at http://www.copyright.gov/eco/notice_special.html.
Filing your claim now will help ensure the earliest possible effective date of registration, although copyright registrations will not be processed until the Copyright Office reopens.
Source: The U.S. Copyright Office