$SIGN
The more I look at SIGN, the more I think the real strength of the design is that it refuses to treat payment, identity, and evidence like separate layers that can somehow work alone.
A payment rail without identity is basically moving value without knowing enough about who or what stands behind the movement.
Identity helps, but identity on its own still feels weak if it cannot leave behind evidence that another system, institution, or auditor can actually trust later.
A lot of systems stop there and call that enough.
SIGN doesn’t.
It ties execution, identity, and evidence into the same flow. To me, that’s the deeper win in the design.
The system is not just trying to move value or verify a person. It is trying to make action, attribution, and proof hold together instead of breaking apart the moment scale gets real.