I know blockchain is a dirty word around here, but this is absolutely an application that can use something like Bitcoin to store hashes of a site on a specific

I know blockchain is a dirty word around here, but this is absolutely an application that can use something like Bitcoin to store hashes of a site on a specific date, giving you the closest thing you can get to "proof" that the site existed on that date with that specific content. Then you don't need "secure" storage of the actual archives, you can have as many copies as possible with as many people as possible and not worry about someone tampering with the archives.