[prepend]

To do this meaningfully on any dataset that changes (finance, health, etc) will cost too much to store on blockchain. It’s expensive enough trying to store it on s3 or even glacier. If the chain stores everything forever it will get too expensive too fast.

I think a more realistic (but way less money for speculators) is to store PKI on a blockchain, then encrypt any blob anywhere and sign. Send that signature to the smart contract and have them pull blob from non-blockchain store.

If it’s something that the owner has agency issues with (eg, calculating fico score) then register the hashes of the data with a blockchain.

No need to store the data on the chain unless you’re worried about it disappearing.

[nostrademons]

Yeah, this assumes the existence of something like FileCoin/Storj that stores the actual data off-chain, with metadata & access keys on-chain. The blockchain is used to validate the integrity of the data blob and to financially compensate the host(s) that are physically storing the data.