I’m not certain either way, but part of the document tries to make a big deal about some GitHub profiles having the “arctic code vault archive” badge, and implying that has something to do with running an archive website.

Pretty much anyone who has made any kind of commit to an open source project has that badge.

Yeah I just read through it and it presents absolutely no useful evidence. They establish that there's a developer in the US called Denis Petrov. They establish that someone involved with archive.today is often referred to as Denis Petrov. Then they make some weird leaps to conclude that they must be the same person.

A quick web search suggests Denis Petrov is not at all a unique name. Just because on of them wrote a somewhat feminist thought on a blog in 2004 and another forked a... let's call it "satirically feminist" project on GitHub does not in any way suggest they are the same person.