Https://aact.org/sites/default/files/webform/aactfest_technical_information_t/_sid_/full-list-of-copyright-customer-r-service-numbers-in-the-usa-a-comprehensive-2025guide.pdf https://aact.org/sites/default/files/webform/aactfest_technical_information_t/_sid_/full-list-of-copyright-customer-r-service-numbers-in-the-usa-a-comprehensive-2025guide.pdf