[thinkmassive]

It can be archived by something like the Wayback Machine.

For the strongest guarantee of non-repudiation, there’s OpenTimestamps:

https://opentimestamps.org/

[ilyt]

Nothing strong about it, as you could trivially timestamp faked content.

[thinkmassive]

Good point. I thought there was a way to validate authenticity by involving the TLS cert, but I’m unsure how that would actually work.