Most verification systems stop at the proof. Someone checks a credential, gets a yes or no, then manually triggers whatever comes next. The proof and the payment are two separate operations running on separate systems with a human in the middle.
Sign Protocol collapses that entirely.
Here's the actual flow. An issuer publishes a schema and creates an attestation — eligibility status, compliance conditions, milestone completion. The recipient holds it in SignPass wallet. When a payment condition is met, the Programmable Rules Engine queries that attestation in real time: still valid, policy conditions match, correct rail. If everything checks out, TokenTable executes the capital movement automatically. No manual approval. No batch processing. Every payment immediately creates a new settlement attestation, closing the loop and feeding the next cycle.
The entire chain — proof, rule check, capital release, new proof — runs on-chain, deterministic, and auditable by anyone.
What makes this genuinely different is that policy gets defined once in a schema and capital moves automatically from that point forward. A government encodes welfare eligibility rules into Sign Protocol. Every citizen whose attestation matches those rules receives payment without a civil servant processing anything. One schema, millions of recipients, zero manual steps between proof and money.
The privacy layer holds throughout. Zero-Knowledge Selective Disclosure means the Rules Engine verifies exactly the claim it needs — eligibility true or false — without seeing the underlying personal data. Settlement attestations record that the payment happened and why, without exposing who received what to anyone outside the authorized audit chain.
The honest limitation is schema design. The automation is only as good as the rules encoded upfront. Edge cases that don't fit the schema cleanly either get rejected automatically or require the government to update the schema first. That rigidity is a feature for consistency but creates friction when policy needs nuance.
Whether governments trust automated capital release at national scale without human checkpoints is still the open question.
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