1503 Protocol

Open-source trust layer for cross-border B2B trade on the XRP Ledger. Provides non-custodial escrow, ed25519 multi-signature custody (3/3 oracle release), and on-ledger anchoring of a Digital Product Passport, so buyer and seller in different jurisdictions can transact with verifiable, auditable settlement instead of blind trust. Runs verify-on-ledger on XRPL testnet with a full end-to-end flow (onboarding, order, escrow lock, oracle release). Privacy by design: only SHA-256 hashes of canonical payloads are anchored on-chain, never personal data. MIT licensed; the goal is a reusable public-good protocol, not a proprietary platform.