The Observation Commitment Protocol
A chain-agnostic cryptographic commitment primitive
OCP defines how any observation — a document, an AI inference result, a digital file, a signed receipt — is hashed, anchored to a public blockchain, and independently verified against raw ledger data.
No SDK. No trusted provider. No indexer required.
The record outlasts the infrastructure that created it.
The Core Guarantee
A record committed via OCP can be verified by anyone, on any client, against raw ledger data, without trusting the system that produced the commitment.
Verification is free. Commitment costs cents.
The proof is structural — not a policy, not a promise.
Chain-agnostic
Works across EVM chains and Solana. Cosmos next.
Zero dependencies
ocp-verify installs in seconds. No SDK required.Tamper-evident
The record exists independently of the system that created it.Independent Production Adoption
OCP is already deployed across independent systems spanning AI infrastructure, attestation tooling, and media provenance.
TruthAnchor
Built by Vincent Wu.
Reference implementation of ERC-8263.
742 live proofs anchored across Polygon, Base, and BNB Smart Chain mainnets.
REST API. Three lines of integration. Gas-free.
gateway.ensub.org
Built by Tiago Merlini / dinamic.eth.
Production AI agent gateway using OCP as its Layer 3 commitment primitive for portable attestation verification.
OCP transaction hash hardcoded in live attestation records.
HBS Image Provenance
Built by Tiago Merlini and @wgw_eth.
Encodes OCP attestation data directly into image pixels.
Proof survives screenshots, re-encoding, and platform stripping.
Start Building
OCP is open source, chain-agnostic, and independently verifiable.
Resources
GitHub
npm
npm install -g ocp-verify
Specification
Composition Note
Coming Soon…