Proof Chaining

Chain Proofs Together

import { verify } from '@brivora/verify';

const verifier = await verify.createVerifier();
const chain = verify.createChain(verifier);

// Each call adds to the chain
const r1 = await verify.govern(fn1, { governance: 'minimal', verifier, chain });
const r2 = await verify.govern(fn2, { governance: 'minimal', verifier, chain });

// Verify the entire chain
const chainResult = await verify.checkChain(
  [r1.proof, r2.proof],
  verifier.publicKey
);
console.log(chainResult.valid);           // true
console.log(chainResult.chain_integrity); // true

How It Works

Each proof contains a previous_proof field linking it to the prior proof in the chain. This creates a hash-linked chain similar to a blockchain:

Proof 1 → Proof 2 → Proof 3 → ...
  ↑ root    ↑ prev=hash(1)   ↑ prev=hash(2)

Chain verification:

1. Verify each proof’s signature individually
2. Verify each proof’s previous_proof hash matches the prior proof
3. Verify the chain is complete (no gaps)

If any proof in the chain is tampered with, all subsequent proofs become invalid because their previous_proof hashes won’t match.