Settlement Witness / SAR

I’m building and maintaining SAR (Settlement Attestation Receipts), a lightweight, verifiable format for proving agent task execution after a transaction completes.

SAR is designed to fill a gap in the agent economy stack:

• identity systems answer who
• trust scores estimate risk
• payment rails move value

SAR answers:

Did the agent actually deliver what was paid for?

What this supports

• Settlement Witness (verified in reference verifier testing, 8/8 pass)
• DefaultVerifier infrastructure (public endpoints + JWKS)
• JWS compatibility layer for ecosystem interoperability
• Ongoing development of verifiable execution receipts

Why sponsorship matters

This work is being used as shared infrastructure.

Sponsorship helps:

• keep endpoints stable and available
• maintain compatibility with evolving standards
• expand SAR into additional verification dimensions

If you're building on SAR or relying on Settlement Witness in your stack, your support helps keep this layer neutral, stable, and publicly accessible.