Zest Protocol Unveils Live Demo for Bitcoin-Backed Lending on Ethereum

Zest Protocol has launched a mainnet demo of its Bitcoin Collateral Vaults, allowing users to test borrowing USDC on Ethereum without moving their native BTC. The system uses self-custodial Taproot vaults on Bitcoin and represents corresponding collateral records on Ethereum.

Ethereum smart contracts handle the USDC borrowing side of the position, but the Bitcoin itself remains inside a vault on its home chain. Zest says every permitted destination for the BTC is signed by the depositor when the vault is created, preventing an operator from redirecting the collateral elsewhere.

The current demo caps collateral at 0.001 BTC per wallet and is not yet the unrestricted production launch. Once the loan is repaid, the pre-authorized path returns the BTC to the user. If a position falls below its required collateral level, only the portion required for liquidation can move to a registered liquidator.

The architecture is also being designed around BitVM verification, which could allow events on the Ethereum lending side to be proven back to Bitcoin with fewer trust assumptions.