A lot more credible than archive.org that lets archives be changed and deleted by the archive targets.

What's your better idea?

Does archive.org really let its archives be changed? That's very different than letting them be deleted from a credibility perspective.

Yes.

Archive.org snapshots may load javascript from external sites, where the archived page had loaded them. That script can change anything on the page. Most often, the domain is expired and hijacked by a parking company, so it just replace the whole page with ads.

> the archive targets

Isn't there a substantial overlap with the copyright holders?