Fiscal402 Fiscal infrastructure for autonomous commerce. Protocol and public product updates. https://www.fiscal402.com/ 2026-09-11T12:00:00Z Fiscal402 https://www.fiscal402.com fiscal402.receipt/1.0.0 public protocol https://www.fiscal402.com/changelog#1.0.0 2026-09-11T12:00:00Z Initial public protocol surface: fiscal402.receipt/1.0.0, fiscal402.sorted-json/1, Ed25519/JWKS verification, UBL UTF-8 SHA-256 artifact binding.