What is tBTC v2 (TBTC)?

Quick Facts

  • Type: Decentralized wrapped Bitcoin (ERC-20)
  • Peg: 1:1 backed by native BTC reserves
  • Issuer: Threshold Network (Keep Network + NuCypher merger)
  • Security: Threshold ECDSA, 51-of-100 node operators
  • Governance: Threshold DAO
  • Chains: Ethereum, Arbitrum, Base, Polygon, Optimism, Solana
  • Use cases: DeFi lending, liquidity provision, stablecoin minting

Introduction

tBTC v2 is a trust-minimized, decentralized wrapped Bitcoin token that allows BTC holders to participate in DeFi and Web3 applications without relying on a centralized custodian. Each tBTC is backed 1:1 by real Bitcoin locked on the Bitcoin network and is always redeemable for native BTC.

Unlike traditional wrapped Bitcoin solutions, tBTC v2 removes any single point of failure by distributing custody across a decentralized network of independent node operators.

History & Background

tBTC v2 is developed by Threshold Network, which was formed through the merger of two established crypto projects: Keep Network and NuCypher. The first version of tBTC laid the groundwork, and version 2 significantly improved scalability and decentralization.

Threshold Network operates under the Threshold Foundation, a foundation company registered in the Cayman Islands, and is governed by the Threshold DAO community.

How tBTC v2 Works

When a user deposits BTC, the funds are directed to the most recent wallet generated by the Threshold Network. These wallets are controlled by 100 independent node operators using threshold ECDSA cryptography — a form of secure multi-party computation (MPC).

A minimum of 51 out of 100 signers must agree before any transaction involving the deposited Bitcoin can be authorized. No single operator ever holds a complete private key; each holds only a key share.

Depositing BTC grants the user a transferable balance that can be used to mint tBTC, a supply-pegged ERC-20 token. To redeem, users burn their tBTC and receive native BTC back. The system also uses Guardians — community members who monitor transactions for fraud — and Minters, which include DAOs like Curve and Aave that manage minting operations.

Tokenomics

tBTC uses a supply peg rather than an algorithmic price peg. The token supply always mirrors the amount of BTC locked in the bridge, verifiable on-chain at any time. This design avoids synthetic collateral models and ensures no inflation beyond the locked BTC backing.

Node operators who secure the network must stake T tokens (the Threshold Network's native governance token), exposing themselves to penalties for misbehavior and aligning their incentives with the protocol's security.

Circulating supply ? 5,046 TBTC
Total supply ? 5,046 TBTC
Max supply ? -- TBTC
Updated 3h ago

Ecosystem & Use Cases

tBTC v2 is broadly compatible with EVM chains and is deployed across Ethereum, Arbitrum, Base, Polygon, and Optimism, as well as Solana. This multi-chain reach lets Bitcoin holders access a wide range of DeFi primitives, including:

  • Lending and borrowing on platforms like Aave
  • Liquidity provision on decentralized exchanges like Curve
  • Stablecoin minting using BTC as collateral

Team, Governance & Community

Threshold Network is governed by the Threshold DAO, where T token holders vote on protocol upgrades, parameters, and treasury decisions. The bridge contract is upgradeable via a ProxyAdmin controlled by the DAO, with a 24-hour governance delay on vault upgrades to protect users.

The community engages through Discord, Telegram, Reddit, and Twitter/X.

Advantages

  • Truly decentralized custody — no single custodian controls deposited BTC
  • Trust-minimized design — threshold cryptography eliminates single points of failure
  • On-chain verifiable reserves — BTC backing is transparent and auditable at all times
  • Multi-chain availability — usable across major EVM chains and Solana
  • Permissionless — anyone can deposit BTC and mint tBTC without KYC or approval

Risks & Challenges

  • Smart contract risk — bugs in bridge contracts could affect deposited BTC
  • Operator collusion — while requiring 51-of-100 raises the bar, coordinated attacks remain theoretically possible
  • Liquidity depth — tBTC competes with more established wrapped Bitcoin products that have deeper DeFi liquidity
  • Governance risk — DAO-controlled upgrades introduce the risk of malicious or poorly designed proposals

Long-Term Vision

tBTC v2 aims to become the leading trust-minimized Bitcoin bridge across the multi-chain ecosystem, bringing Bitcoin's value into DeFi without compromising on decentralization. As Bitcoin adoption grows and DeFi expands, tBTC's permissionless, censorship-resistant model positions it as a foundational piece of BTCfi infrastructure.

Frequently Asked Questions

tBTC v2 is a decentralized wrapped Bitcoin token issued by the Threshold Network. Each tBTC is backed 1:1 by real BTC locked in the bridge and can always be redeemed for native Bitcoin.

Unlike WBTC, which relies on a centralized custodian, tBTC v2 distributes custody across 100 independent node operators using threshold cryptography. No single party ever controls the full private key to the deposited Bitcoin.

You generate a deposit address, transfer BTC to it, and the protocol mints an equivalent amount of tBTC on Ethereum. The process is permissionless and requires no KYC.

You burn your tBTC tokens, specify a Bitcoin receiving address, and receive your BTC after the operators validate and process the redemption.

Threshold Network is the protocol behind tBTC v2, formed by the merger of Keep Network and NuCypher. It is governed by the Threshold DAO and uses the T token for governance and operator staking.

tBTC v2 is deployed on Ethereum, Arbitrum, Base, Polygon, Optimism, and Solana, making it accessible across the major DeFi ecosystems.

Node operators secure deposited Bitcoin by collectively holding key shares and requiring a 51-of-100 majority to authorize any transaction. They must stake T tokens, which can be slashed if they misbehave.

The BTC backing tBTC is verifiable on-chain at all times through a supply peg model, with no algorithmic mechanism needed. The bridge contracts are open source and governed by the Threshold DAO.