Every piece of data that flows through DRM3 is cryptographically signed at the moment it is created. Each product signs with its own Ed25519 key derived from a single root via HKDF. 30 total signers, 29 active, 29 anchored on Base mainnet. Products: Connor (7 keys), Signals 3P (21 keys), RunsOn (1 key). Every key published for independent verification. On-chain registry at DRM3Registry on Base.