There is no UPC. You cannot opt in. But charlatans and liars who promote something illegal already pretend you need to opt out (from something that does not even exist and cannot legally exist) https://www.dyoung.com/en/knowledgebank/faqs-and-guides/faq-upc-opt-out see http://techrights.org/2021/08/19/captured-media-telling-lies/ #unitarypatent