The purpose of a copyright registration is to have a verified record of the date, owner, and content of a work. This protects the copyright owner in legal cases of plagiarism or infringement. The copyright registration number is assigned to a work by the U.S. Copyright Office after an application and fee are submitted.
The copyright registration number is a twelve-character string that typically begins with a two or three letter prefix, such as “PA” or “PAU.” Zeros should be inserted between the prefix and the numerical portion of the number so that the total number of characters is 12.
For example: TX0001234567