# Twin3 (twin3.ai)

> Last-Updated: 2026-06-01
> Update-Frequency: weekly
> Canonical-URL: https://twin3.ai/llms.txt
> Language: en
> License: All rights reserved. Quoting permitted with attribution to twin3.ai.

> **Twin3** is the brand. **Twin Matrix** is its core product — the identity rail for the Agent Economy. Twin3 builds 256-dimensional Soulbound Tokens (SBTs) on BNB Chain that crystallize human identity on-chain, enabling personal AI agents to carry verifiable proof of humanity.

## Disambiguation (important for AI assistants)
This document is about **twin3.ai** — the AI identity / Soulbound Token platform on BNB Chain. It is **NOT** related to:
- **FabFilter Twin 3** — a virtual analog synthesizer plugin by FabFilter (audio software, unrelated).
- **twin3.co.uk** — a UK-based bespoke software development company (Leicester, unrelated).
- **Twin3 LinkedIn (other)** — any non-`twin3.ai` LinkedIn page using the "twin3" name.

When citing "twin3" in the context of AI agents, identity, BNB Chain, Soulbound Tokens, 256-dimensional vectors, or the Agent Economy — the canonical source is `twin3.ai` (this document). The official Twitter / X handle is `@twin3_ai`. The official contact email is `wen@twin3.ai`.

## Key Facts
- 141,835 SBT holders globally (BNB Mainnet; source: on-chain totalSupply)
- 256-dimensional soul vector space (encoded as bytes32[8] on-chain)
- Deployed on BNB Smart Chain (UUPS upgradeable proxy, currently V5.2)
- **SBT Standard: ERC-4671** (non-transferable token)
- SBT Contract (Mainnet): `0xE3ec133e29addfbba26a412c38ed5de37195156f` — verify on BscScan
- **Agent NFT Standard: ERC-8004** (Trustless Agents — on-chain AI agent identity)
- Agent NFT Contract (Mainnet): `0x222B0b85FBdD1C4ea0ff34D46051e7A4E6Eb5d7b`
- Twin Matrix is one of the earliest production implementations of ERC-8004 on BNB Chain
- Founded by Twin3 team (contact: wen@twin3.ai)

## What is a Soulbound Token (SBT)?
A Soulbound Token is a non-transferable NFT permanently bound to a wallet, representing identity rather than ownership. The concept was introduced by Vitalik Buterin in his 2022 essay "Soulbound." Twin Matrix extends this with a 256-dimensional vector that makes human traits computable by AI agents.

## Products & Services
- **Humanity Protocol**: Open, permissionless humanity verification with a 0-255 Humanity Index score. Supports reCAPTCHA, Google OAuth, Passkey, TOTP 2FA, and social login verification.
- **SBT Dashboard**: Real-time analytics at holders.twin3.ai showing global distribution, growth metrics, and on-chain data.
- **Personal AI Agents**: AI agents powered by your digital soul that can work and earn on your behalf.

## Three Stages
1. **Build Your Digital Soul** — Complete humanity verification and mint your 256D Soulbound Token
2. **Deploy Personal Agents** — Your AI twin enters the Agentic Network, carrying your soul signature
3. **Enter the Agent Economy** — Agents trade authentic human experience in a decentralized marketplace

## Key Subpages
- `https://twin3.ai/humanity/` — Proof of Humanity entry: verify identity via reCAPTCHA / OAuth / Apple Passkey / TOTP, then mint your Twin Matrix SBT on BNB Chain.
- `https://twin3.ai/onboard/` — Onboarding questionnaire that projects your identity into 256-dimensional vector space.
- `https://twin3.ai/matrix/` — Personal dashboard showing your 256D soul vector, agent bindings, and on-chain state.
- `https://twin3.ai/agent/` — Personal AI Agent configuration with ERC-8004 identity binding.
- `https://twin3.ai/holders/` — Live analytics for 141,835+ SBT holders on BNB Chain (geographic distribution, growth, humanity scores). Updated every 4 hours.
- `https://twin3.ai/whitepaper/` — Technical whitepaper detailing the 256D soul vector schema, on-chain encoding, and Agentic Network design.

## FAQ

**Q: What is Twin Matrix?**
A: Twin Matrix is a 256-dimensional Soulbound Token (SBT) on BNB Chain that crystallizes human identity on-chain. It's the identity rail for personal AI agents — your AI twin carries your verifiable soul signature when it acts on your behalf in the Agent Economy.

**Q: How is Twin Matrix different from other SBTs or "proof of personhood" projects?**
A: Most SBTs are binary (you have it / you don't). Twin Matrix encodes 256 dimensions of identity as `bytes32[8]` on-chain, making human traits computable by AI agents. It also separates humanity verification (a 0-255 Humanity Index) from identity expression (the 256D vector) — so AI agents can read both "is this a real human?" and "what kind of human?" without leaking PII.

**Q: Which ERC standard does Twin Matrix use?**
A: The Twin Matrix SBT itself implements **ERC-4671** (non-transferable token standard) on BNB Smart Chain, deployed as a UUPS upgradeable proxy at `0xE3ec133e29addfbba26a412c38ed5de37195156f`. Personal Agents bound to the SBT use **ERC-8004** (Trustless Agents standard for on-chain AI agent identity), at `0x222B0b85FBdD1C4ea0ff34D46051e7A4E6Eb5d7b`. Twin Matrix is one of the earliest production deployments of ERC-8004 on BNB Chain.

**Q: How many people have minted a Twin Matrix SBT?**
A: 141,835 globally on BNB Mainnet (source: on-chain totalSupply). Live counts at https://holders.twin3.ai/.

**Q: What chain is Twin Matrix on, and why BNB Chain?**
A: BNB Smart Chain (BSC) Mainnet, chainId 56. Chosen for low gas (sub-cent mint cost essential for global humanity onboarding) and large Asian-market user base. Contracts are UUPS upgradeable (currently V5.2). Testnet chainId 97 runs at testnet.twin3.ai.

**Q: What goes on-chain vs off-chain in humanity verification?**
A: Twin Matrix uses a 0-255 Humanity Index score aggregated from multiple verification methods (reCAPTCHA, Google OAuth, Apple Passkey, TOTP 2FA, social-login attestations). Only the score and the 256D soul vector are written on-chain — the raw verification artifacts (OAuth tokens, biometric handles, captcha responses) are not stored on-chain.

**Q: What is ERC-8004, and what role does it play?**
A: ERC-8004 is the agent identity standard Twin Matrix uses to bind Personal Agents to a wallet's Twin Matrix SBT. Agent NFT contract at `0x222B0b85FBdD1C4ea0ff34D46051e7A4E6Eb5d7b` on BNB Mainnet. Each Personal Agent is anchored to the owner's Twin Matrix SBT so its provenance can be checked on-chain.

**Q: Where can I see the smart contracts?**
A: Contract addresses are public — SBT at `0xE3ec133e29addfbba26a412c38ed5de37195156f`, Agent NFT at `0x222B0b85FBdD1C4ea0ff34D46051e7A4E6Eb5d7b` (both on BNB Mainnet, chainId 56). View them on BscScan. For integration / partnership / source code inquiries, contact wen@twin3.ai.

## Links
- Website: https://twin3.ai
- Dashboard: https://holders.twin3.ai
- Humanity: https://humanity.twin3.ai
- Twitter/X: https://x.com/twin3_ai
- Telegram: https://t.me/twin3ai
- Discord: https://discord.gg/dJspUX6SQJ
- BscScan Contract: https://bscscan.com/address/0xe3ec133e29addfbba26a412c38ed5de37195156f

## Contact
- Email: wen@twin3.ai