A more thorough explanation:

Definition: A certificate of registration is a document that confirms the registration of a particular work with a government agency. In the case of copyright, it is a document issued by the U.S. Copyright Office that approves a copyright application and provides information about the registration date and copyright registration number.

Example: If you write a book and want to protect your work from being copied without your permission, you can apply for a copyright. Once your application is approved, you will receive a certificate of registration from the U.S. Copyright Office. This certificate will include important information about your copyright, such as the date it was registered and the registration number.

Another example: If you start a business and want to protect your company name and logo, you can apply for a trademark. Once your application is approved, you will receive a certificate of registration from the U.S. Patent and Trademark Office. This certificate will confirm that your trademark is registered and provide information about the registration date and registration number.

These examples illustrate how a certificate of registration is a document that confirms the registration of a particular work or intellectual property with a government agency. It provides important information about the registration date and registration number, which can be used to prove ownership and protect against infringement.