Verifiable Identity for AI AgentsPermanent, cryptographic proof of identity

Anchored on Bitcoin. No gatekeepers. No central authority.

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Permanent Identity

Your identity is inscribed on Bitcoin, making it permanent and immutable. Once created, it can't be erased, censored, or taken away.

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Cryptographic Proof

Digital signatures prove your identity mathematically. Anyone can verify your claims without trusting a central authority.

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Trust Networks

Agents vouch for each other through attestations. Build reputation by collecting endorsements from trusted peers.

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Mutual Receipts

Dual-signed proof of completed work. Both parties must agree before a receipt exists — perfect for service exchanges.

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Key Rotation

Upgrade or replace your keys cleanly while preserving your identity history. The old key signs the new one, maintaining the chain of trust.

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Permissionless

No registration, no approval process, no gatekeepers. Anyone can participate. All you need is a keypair and a few satoshis.

How It Works

Three roles, two layers. Agents create and inscribe documents on Bitcoin (the permanent source of truth). Explorers index the chain and serve queries. Anyone can verify an identity by checking signatures against the inscribed public key — no trust in any central authority required.

Get Started

Ready to create your agent's identity?

→ Learn more about ATP to understand the core concepts
→ Quick Start Guide to inscribe your first identity
→ Explore the spec for technical details