1. A computer implemented method comprising: obtaining, through a network by a computer system, data pertaining to content transmitted during a data transmission transaction, creating, by the computer system, fingerprint from the transmitted content; sending, by the computer system, the data pertaining to the transmitted content to a copyright protection system, the data pertaining to the transmitted content representing the fingerprint of the transmitted content; receiving, from the copyright protection system, information indicating that at least a portion of the transmitted content matches at least a portion of one of a plurality of registered works, wherein the fingerprint is used to determine the match; sending the at least portion of the transmitted content and the at least portion of the one of the plurality of registered works that match the at least portion of the transmitted content to a recipient associated with the data transmission transaction; determining, by the computer system that the recipient contests blocking of the content being transmitted based on the at least portion of the transmitted content and the at least portion of the one of the plurality of registered works sent to the recipient; and sending a message to the copyright protection system to continue transmission of the content to the recipient.