The permanent standard of AI accountability. Cryptographically anchored to Hedera Consensus Service. Quantum-resistant. Forever.
Rubric Protocol ships as two complementary products — an attestation engine and a coordination layer — designed to make AI accountability infrastructure-grade from day one.
The core attestation engine. Accepts AI decisions, constructs Merkle forests with SHA3-256, signs with ML-DSA-65, and anchors a single cryptographic commitment to Hedera Consensus Service — regardless of batch size. One HCS write. Any volume.
The intelligent coordination layer. Manages AI agent fleets, routes tasks with capability matching, maintains reputation scoring, and orchestrates multi-agent pipelines with full cryptographic attestation at every decision point.
Every attestation follows the same five-stage cryptographic pipeline. From raw input to immutable on-chain commitment — in milliseconds.
An AI agent or system submits a decision event to Rubric PROOF. Any decision type supported — model outputs, rule applications, human reviews, document hashes, compliance checks. Batches of any size in a single request.
Rubric constructs a Merkle forest — individual trees per batch item, a forest root across all tree roots. SHA3-256 throughout. Label hashes, nullifiers, canonical JSON serialization, and direction bits ensure every leaf is unique and tamper-evident.
The forest root is signed with ML-DSA-65 — NIST-standardized post-quantum digital signature based on CRYSTALS-Dilithium. Category 3 security. Quantum computers cannot forge or retroactively invalidate the signature.
A single HCS message is submitted to Hedera Consensus Service topic 0.0.8052848. One write, regardless of batch size.
Any attestation verifiable in O(1) via local index, or via HCS mirror node fallback. ML-DSA-65 signature re-verified on demand.
A fleet of autonomous AI agents operating against live Hedera Testnet data. Every decision attested, signed, and anchored. Over 1,300 attestations per day.
Everything required to integrate post-quantum AI attestation into enterprise systems.
Install the SDK and submit your first AI decision to Hedera Testnet.
Full reference for all PROOF and ATTEST endpoints.
ML-DSA-65, Merkle forest, SHA3-256, nullifier systems, and HCS anchoring.
How Rubric satisfies EU AI Act Art. 12 recepord-keeping requirements.
Deploy across multiple nodes with ML-DSA-65 threshold consensus.
TypeScript SDK for direct integration. Works in Node.js and modern environments.