[dane-pgp]

People used HTTPS before there were Certificate Transparency logs, so there's no reason why those couldn't be run for DNSSEC too.

https://datatracker.ietf.org/doc/html/draft-zhang-trans-ct-d...

https://www.huque.com/2014/07/30/dnssec-key-trans.html

https://datatracker.ietf.org/doc/html/draft-ietf-dnsop-deleg...