The "censored" part of archive.today seems unrelated to the filtering itself. 1.1.1.3 flags Pornhub.com as "EDE(17): Filtered" but archive.today is "EDE(16): Censored".

Supposedly it should be an external party that's requiring Cloudflare not to publish the DNS record. https://www.rfc-editor.org/rfc/rfc8914.html#name-extended-dn...