This article greatly overstates the benefits of blockchain. Blockchain provides no assurances of data accuracy. Once a fraudulent transaction, child pornography, or bad data is entered into a blockchain it cannot be removed. All blockchain does concerning data integrity is prevent entries from being altered or removed, once they are accepted.

Ids are better handled by other architecture. The state of Maryland has my driver's license in digital form and it works at the Reagan National Airport's TSA checkpoint. NYC used a private blockchain for COVID-19 vaccination records, and they could not get my son's record to show correctly.

If we relied on blockchain for ownership records, once a thief transferred your deed on the blockchain, your house would be gone.

See https://concerned.tech/ for a rebuttal to the blockchain promotion.