...so, we're back to trusting a set of centralized parties, then? What if those get wiped? Altered (though that seems less likely)? Is such an archive a fork ve

...so, we're back to trusting a set of centralized parties, then? What if those get wiped? Altered (though that seems less likely)? Is such an archive a fork vector? I wrote a blockchain explorer on Bitcoin as a technical exercise, and the intermediate state thing caught my attention, too. If all copies of a block disappear and all you're left with is a hash, what do you have? A complete blockchain?