ChainLog

Tamper-proof audit trails for AI agents. Verifiable by anyone. Alterable by no one.

Writes cryptographic fingerprints of AI agent actions to Base L2 blockchain. Only the hash goes on-chain — no PII, no sensitive data. Includes TypeScript and Python SDKs, a CLI verifier, and a Next.js dashboard.

Features

• On-chain audit trail on Base L2 (Ethereum)
• Model version pinning (EU AI Act compliance)
• Dead man's switch for contingency triggers
• TypeScript SDK (31 tests)
• Python SDK (31 tests)
• CLI verifier tool
• Next.js dashboard (live on Vercel)

Installation

Contracts

npm install
npx hardhat compile

TypeScript SDK

cd sdk && npm install

Python SDK

cd python && pip install -e .

Usage

TypeScript

import { ChainLog } from '@chainlog/sdk';
const cl = new ChainLog({ rpcUrl, contractAddress });
await cl.log({ action: 'inference', model: 'claude-sonnet-4-6', hash: '...' });

Python

from chainlog import ChainLogClient
cl = ChainLogClient(rpc_url=..., contract_address=...)
cl.log(action="inference", model="claude-sonnet-4-6", hash="...")

Development

npx hardhat test        # Contract tests
cd sdk && npm test      # TS SDK tests
cd python && pytest     # Python SDK tests
cd cli && npm test      # CLI tests

Status

Sprint 6 complete. Dashboard live on Vercel. Contracts pending mainnet deploy (needs funded Base Sepolia wallet).

License

Proprietary