AFAIK the only evidence of tampered pages are those involved in this controversy. That archive.xx could tamper pages has always been possible (and a reason why

AFAIK the only evidence of tampered pages are those involved in this controversy. That archive.xx could tamper pages has always been possible (and a reason why Wikipedia should have their own archive, and migrate ASAP). But still, Wikipedia can corroborate any archive.xx page, and if they find a matching source, archive that instead.