How do I register online works that require hard copy deposits to satisfy Library of Congress deposit regulations?
“..if you must send a hard copy or copies of your deposit to comply with the “best edition” requirements for published works, you must print out a shipping slip, attach it to your deposit, and mail the deposit to the Copyright Office. Send the deposit, fee, and paper registration form packaged together to:
Library of Congress
U.S. Copyright Office
101 Independence Avenue SE
Washington, DC 20559-6211
— U.S. Copyright Office, Circular 1