Starknet's strkBTC Goes Live: Bitcoin Privacy Arrives — But at the Cost of New Trust Layers

Starknet launched strkBTC on May 12, locking BTC on Bitcoin's base layer to back an ERC-20 token with both public and shielded modes. In shielded mode, users can hide selected balances and transfers from outside observers, with viewing keys routed to an independent third-party auditor for selective disclosure when regulators require it. The product went from privacy thesis to live deployment in 32 days, crossing five development milestones between April 10 and May 12.

The architecture rests on a five-member federation handling BTC movement between chains, bridge routes from Atomiq and Garden, and a smart-contract environment built for rapid iteration — none of which exist on Bitcoin's base layer. That trust stack is the trade-off: the privacy gain is real, but it sits on top of federation governance, bridge risk, and a third-party auditor.

StrkBTC joins a broader pattern — Liquid,…