Is there a way to enter duplicate information?

“Yes. When you register a New Claim you can elect to save it as a Template. This is a very useful tool when you have duplicate information to enter for several claims.”
— U.S. Copyright Office, eCO Online System

“You must first “Register a New Claim” in order to create a Template. When you have completed filling in all required information on all screens, and you are at the “Review Submission” screen, look for the “Save Template” button. Click on it and follow the screen prompts.”
— U.S. Copyright Office, eCO Online System