[ChainOfFools]

a number of projects aimed at this exact problem - one of them is/was called Tyrion - there were probably a dozen because the concept is quite obvious. but the usual blockchain problems frustrate its success, namely that blockchains are not independent of human control, but only obfuscate it behind unprovable promises of decentralization.

[orblivion]

I would think that's only a forward-facing problem. I.e. policies could change. But so long as the chain has not been corrupted, and assuming it was proof-of-work, couldn't you more or less prove that the chain going backwards has in fact not been corrupted? Though I suppose it might rely on a reliable account of the hashing power of the world at a given time.