> I could see a similar chain being used by trustworthy organization There's the fatal flaw. As COVID has shown, trust in institutions can easily degrade. The

> I could see a similar chain being used by trustworthy organization There's the fatal flaw. As COVID has shown, trust in institutions can easily degrade. The blockchain doesn't add anything to the trustworthiness of the institutions' assessment of the facts: if the institution is trusted, then it's assessment is trusted regardless of what the blockchain says, and if it's not trusted, then the blockchain won't convince you of anything.