Hey apimade, you brought up some great questions and I'll answer as best I can:
"How is this any different from outsourcing attestation to a third-party?"
There are thousands of identity verification companies around the world. The difference is we use Changefly ID.
"Considering most regulations require the party reliant on validating the data to store the source or proof, it seems like the only plausible mass-deployment of this approach would be US state-based ID systems specifically for drinking/anonymous patrons. That excludes driving, gambling, restricted entertainment, medicine etc."
A growing number of services around the world are requiring identity (are you a real person, or age verification). Changefly ID + Anonymized Identity and Age Verification processes government ID's from over 100 countries.
"Countries wouldn’t adopt it nationally or federally, they’d copy it."
I encourage you to check out the links below to learn how the Changefly ID authentication process works and how Changefly is truly changing the game for privacy and security:
Changefly Anonymous Authentication FAQ:
https://www.changefly.com/security
Changefly ID white paper:
https://www.changefly.com/our-research
Changefly US Patent 12,301,546 B2:
https://patents.google.com/patent/US12301546B2/en