Post-Quantum Safety
Cryptographic primitives built for the post-quantum era. Threshold signatures and quantum-resistant cryptography at the protocol layer.
ACTIVATING BITCOIN'S IDLE CAPITAL
Bitcoin's Agentic Execution Layer
Core Capabilities
for Bitcoin's Next Era
Programmable DeFi Primitives
Native yield, lending, trading, and smart contracts on Bitcoin - making sats programmable without bridges, wrappers, or custody tradeoffs.
AI Centricity
Infra for autonomous agents to transact, optimize, and settle on Bitcoin natively. AI-native architecture from the ground up.
Building Bitcoin's Agentic Economy
Across Three Horizons
Horizon 1
TVL Repatriation
Agentic yield aggregation across native Bitcoin protocols with self-custodial vaults.
Tachi becomes the single interface for optimized BTC yield.
Horizon 2
Capital Efficiency
BTCfi SDK for custom institutional yield strategies.
DeFi primitives (lending, trading, structured products) running on Bitcoin's own security model.
Horizon 3
Universal Programmability
Full SatVM on Bitcoin Mainnet.
Any smart contract, any runtime, any agent running on actual Satoshis. The BTC-native economy goes live.
Tachi's Deep Tech Stack
Cryptographic Breakthroughs
After 18+ months of R&D, we arrived at these breakthroughs that enable Tachi to power programmability for agents natively on Bitcoin.
TAURUS Signature Scheme
Secure onboarding with distributed trust and full self-custody: no bridges, no custodians.
SatVM Modular Runtime
Multi-runtime programmability (EVM, Wasm, Script) natively secured by Bitcoin.
Hash Accumulated Txn Proofs (HAT)
Verifiable receipts for every offchain Bitcoin transaction, ensuring integrity and instant settlement.
Recursive Inclusion Proofs (RIPs)
Aggregated proofs anchored to Bitcoin L1, enabling finality, auditability, and trustless verification.
Scientific Advisor for Tachi
David Chaum
Inventor of digital cash and a pioneer in modern cryptography
Architecture
The Tachi Flow
Tachi's n-tier architecture is designed to derive maximum utility from Satoshis
Your Sats are securely onboarded onto Tachi via TAURUS — no bridges or custodians.
1
Onboarded Sats are virtualized into VTXOs (Virtual UTXOs), activating them for programmable use.
2
Your Bitcoin becomes seamlessly usable across native, high speed BTC apps — each txn generating verifiable proofs.
3
These proofs are aggregated into a Recursive Inclusion Proof, creating a single verifiable state of all activity on Tachi.
4
The validated state is immutably anchored back to the Bitcoin mainnet for final settlement, preserving security & ensuring full auditability.
5
Support
Frequently Asked Questions
Everything you need to know about running agentic finance on self-custodial Bitcoin.
Still have questions?
Can't find the answer you're looking for? Get in touch and we'll get back to you as soon as possible.
Contact UsTACHI is Bitcoin's Agentic Execution Layer. It makes native Bitcoin fully programmable for institutions and autonomous agents, enabling self-custodial BTCFi, 402 payments with native satoshis, and verifiable AI actions onchain.
Unlike conventional scaling solutions, Tachi introduces:
- No Risky Bridges or Wrapped Assets: Native BTC remains on mainnet secured by TAURUS vaults, granting users unilateral exit rights rather than wrapped IOUs.
- No Centralized Operators: The network avoids single sequencers or permissioned federations.
- No L1 Protocol Changes Required: Tachi works today within Bitcoin's existing consensus.
No. Tachi keeps you on native Bitcoin. Your Sats are secured on mainnet in a unique Per-Deposit P2TR Vault via the TAURUS (Threshold-Aggregated Uniquely-Rotated Unilateral-Signature) custody system. They are indexed as Virtual UTXOs (VTXOs) for high-velocity off-chain execution, meaning there are no bridges, wrapped tokens, or third-party custodians involved. Users and agents retain required signer keys and a cryptographically guaranteed unilateral exit path at all times.
Tachi locks native BTC in TAURUS vaults on Bitcoin Mainnet. Each deposit commits to a Taproot script tree containing a cooperative leaf and an exit leaf.
Every off-chain transaction is secured by a HAT (Hash-Accumulated Transaction) proof, which is recursively aggregated into a Recursive Inclusive Proof (RIP) and anchored directly to Bitcoin L1. State transitions are verified via sequential Schnorr signatures (1 User signature + 5-of-7 node signatures). If network liveness is ever compromised, users can recover funds unilaterally via the exit leaf after a 1008-block CSV timelock expires.
The SatVM modular execution environment supports multi-runtime programmability — Script, EVM, WASM, SVM, and ABCI — all in one composable environment running directly on actual Satoshis. Unlike other scaling solutions, SatVM encodes contract states and execution results directly into individual satoshis using cryptographic proofs.
Tachi is built to serve as the sovereign infrastructure layer for the emerging agentic economy. Our key users include:
- AI Agents & Platforms: Needing native BTC ownership, automated transaction rails, and unilateral exits.
- Bitcoin Treasury DATCOs & Institutions: Seeking capital-efficient native yield without wrapped assets, bridges, or leaving Bitcoin's security model.
- Developers & DeFi Protocols: Looking to build structured products on Bitcoin.
Developers can start building on Tachi using the Tachi SDK. Reach out to team@tachibtc.com or join our group on Telegram to get technical documentation and support from the team.
Get Involved
Join us in making Bitcoin the Home of Agentic DeFi
Be part of the movement bringing autonomous finance and intelligent markets to Bitcoin.