Almost all of these would have been possible without a blockchain. Either through a web of trust or even simple cryptographically signed messages with timestamps stored in a normal DB. Some of these aren't even "real world use cases" like Hawaii trying to boost tourism by something-something blockchain.
Civil is a notable exception, though I'm not unconvinced that it couldn't be done without one.
In the end though, if blockchain is sexier / more marketable than signing messages with GPG or SSH keys then fine. At least we're getting higher integrity guarantees on data one way or another.
Civil is a notable exception, though I'm not unconvinced that it couldn't be done without one.
In the end though, if blockchain is sexier / more marketable than signing messages with GPG or SSH keys then fine. At least we're getting higher integrity guarantees on data one way or another.