ArkForge — Prove that it happened

# ArkForge > ArkForge builds verifiable trust infrastructure for AI agents. Trust Layer is a certifying proxy that generates tamper-proof, cryptographically signed receipts for every API call made by an autonomous agent — across any model, any provider, any infrastructure. ## What is ArkForge Trust Layer? Trust Layer sits between an AI agent and any target API. For every transaction it: - Proxies the call transparently (one line of code to integrate) - Generates a SHA-256 proof witnessed by 3 independent parties: Ed25519 signature, RFC 3161 timestamp (FreeTSA / DigiCert / Sectigo pool), and Sigstore Rekor append-only log - Returns a Proof Triptych: machine-readable JSON (L1), HTTP headers (L2), human-readable HTML page (L3) - Stores the proof permanently and makes it publicly verifiable Every proof has a unique ID (e.g. `prf_20260303_161853_4d0904`) and is retrievable at `https://trust.arkforge.tech/v1/proof/{id}`. ## Key differentiator AWS certifies AWS agents. Anthropic certifies Claude agents. OpenAI certifies GPT agents. Each creates a trust silo. ArkForge Trust Layer works across all of them in the same transaction chain — it is the only model-agnostic, provider-agnostic audit layer for multi-agent pipelines. It is not a blockchain, not a payment protocol, and not tied to any AI vendor. ## Use cases - **Agentic billing disputes**: Prove an agent executed a paid API call when a provider denies delivery - **EU AI Act / NIST compliance**: Generate immutable audit trails for AI systems under Article 12 (EU AI Act) and NIST AI RMF requirements - **Multi-agent pipeline auditing**: Track which model called which API in complex agent chains (Claude → GPT → Mistral → custom API) - **Automated payment verification**: Verify agent-initiated payments with cryptographic receipts - **Security forensics**: Reconstruct exactly what an agent did during an incident ## Technical facts - Integration: `POST https://trust.arkforge.tech/v1/proxy` with header `X-A