Oh Look Another Vaccine Thread...

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I was considering posting on /pol/ but they are busy coping right now! This could be considered political but I believe it has enough science to be discussed here.
What is /sci/'s opinion on the state of globalisation and the broad scope of identity records? Here is the situation, am I missing/misinterpreting anything?
Well-meaning alliance of private companies and NGOs trying to tackle global identity problem. Example:
https://id2020.org/manifesto
If you know anything about blockchains it is that they are generally immutable and distributed record keeping protocols. Excellent as they can’t be lost stolen or manipulated (within reasonable objection)!
One of the insights is to use a blockchain ledger to keep a distributed record of identity, and also that such ledgers can be used for vaccine records (Instead of paper/ centralised certificate) and maybe other records. Example:
https://www.biometricupdate.com/201909/id2020-and-partners-launch-program-to-provide-digital-id-with-vaccines
Enter Covid,
Governments are looking to record keep rapidly, consistently, and cross border.
Research science is investigating biometric solutions like the(in)famous Bill & Melinda Gates foundation funding (grant OPP 1150646). Example:
https://stm.sciencemag.org/content/11/523/eaay7162
Slight pushback from people regarding blockchain. Example:
https://www.ledgerinsights.com/id2020-resignation-blockchain-covid-19-immunity-passports/
Conclusion:
Can we foresee a future where your fingerprint, or indeed an on person biometric identifier is linked to a ledger. Meaning – there exists generally immutable data about you linked to your person which you can not opt out of? What will this include?
Would your fingerprint work as some kind of private key? Who has stake in the ledger?
Is this technologically feasible, and what do ethicists think about this or similar scenarios?
Is global progress in identity for general poverty going to compromise anonymity?
Pic, slightly related.