What Is Threshold Network? The Protocol Behind tBTC

Updated August 2026. This article was first published in December 2021. Much has changed since then, including the arrival of the Unified Bitcoin Router and the starts of Verifiable Bitcoin Accounts.

Simply put, Threshold is a way to put your Bitcoin to work across public blockchains without handing custody to a centralized intermediary. What began as a privacy-focused network built on threshold cryptography has grown into the protocol behind tBTC, a trust-minimized way to bring Bitcoin onchain.

On this page:

From a historic merger to Bitcoin infrastructure
Built on threshold cryptography
tBTC: Bitcoin, onchain and trust-minimized
Verifiable Bitcoin Accounts and the Unified Bitcoin Router
A community-governed network
Learn more about Threshold

From a historic merger to Bitcoin infrastructure

Threshold began as the first onchain merger between two decentralized networks, Keep and NuCypher, both built around user sovereignty through threshold cryptography. That founding idea still holds today: no single party should control a user's assets. Over the years, the network's focus has narrowed to a core problem in the space, which is making Bitcoin usable onchain without reintroducing the custodians that Bitcoin was designed to avoid.

Built on threshold cryptography

Threshold's security comes from threshold cryptography, where a distributed group of operators jointly signs and secures activity without any one of them holding the full key. This is the same principle that stands behind tBTC: independent signers back every deposit, and the group is rotated so that no fixed set of operators can seize control. The approach keeps user assets protected while preserving the transparency of a public blockchain.

GO DEEPER: Read No Single Point of Failure: Why Threshold Cryptography Matters or see the Threshold documentation.

tBTC: Bitcoin, onchain and trust-minimized

The network's core product is tBTC, a trust-minimized tokenized Bitcoin backed 1:1 by BTC. Rather than relying on a single custodian to hold the underlying Bitcoin, tBTC uses threshold cryptography and a rotating signer set, which keeps reserves and redemptions verifiable onchain. tBTC has operated on mainnet for six years with zero losses, and it now moves across many chains and connects to onchain lending markets and decentralized exchanges.

In practice, that gives Bitcoin holders room to do a few things at once:

Move Bitcoin across many chains without a central custodian.
Verify 1:1 BTC reserves directly onchain, rather than trusting an attestation.
Put Bitcoin to work in onchain lending markets and on decentralized exchanges.
Redeem back to native Bitcoin that the holder controls.

RELATED: See how the market shifted in Bitcoin in DeFi After the 2026 BTCFi Reset or check common questions in the tBTC FAQ.

Verifiable Bitcoin Accounts and the Unified Bitcoin Router

Threshold has extended this infrastructure toward institutions with Verifiable Bitcoin Accounts, a framework for deploying Bitcoin onchain while custody stays where the holder already keeps it. Verifiable Bitcoin Accounts are built on Bitcoin Script and Partially Signed Bitcoin Transactions, so the rules for moving capital are enforced by Bitcoin itself rather than by an outside application. For everyday users, the Unified Bitcoin Router combines tBTC's mint and redeem flows with swap and bridge routing in one interface, which removes much of the friction of moving Bitcoin between chains and applications.

Use Bitcoin onchain without moving it out of the custody you already trust.

Custody stays with the holder's existing arrangement.
Spending conditions and recovery routes are written in Bitcoin Script.
Capital sits in a segregated account, verifiable through Bitcoin UTXO.
Compatible with qualified custodians and self-custody setups.

Verifiable Bitcoin Accounts are available to qualified institutional participants, while the Unified Bitcoin Router is open to anyone using tBTC.

RELATED: Read the announcement, Verifiable Bitcoin Accounts: Your Custody, Your Terms, or visit the Institutional page.

A community-governed network

Threshold remains a community-driven network, governed through the Threshold DAO and the T token. Token holders steer treasury and protocol decisions, while an elected council of contributors handles ongoing parameters and can act as a safeguard on proposals. The direction of the network is set by its participants rather than a single company.

Learn more about Threshold Network

Going forward, Threshold aims to be a straightforward way to use Bitcoin across public networks, with tools that keep custody and verification in the user's hands. You can read the documentation or explore the app to see how tBTC works, and the community on Discord is open if you want to follow along.

Follow for upcoming updates and releases, and explore onchain Bitcoin deployment through the Threshold App.