Bit2

A Bitcoin layer designed by Fairgate that replaces global consensus with client-side validation: state transitions are checked locally by the parties involved, the chain records only timestamps and commitments, so each layer-two transaction occupies a few bytes on the main chain with no separate data availability layer and no centralised sequencer. Payments settle deterministically within a second, with finality from Bitcoin. Verification rests on the proof chain each side holds, and a dispute is resolved by submitting the matching commitment to the main chain rather than waiting for global confirmation.

The design targets machine-to-machine payments: scripted spending limits, enforceable receipts, confidential transfers and delegated wallets let autonomous agents settle unattended. The architecture was explained publicly from April 2026, and by August 2026 working prototypes existed for the timestamp service, client, confidential transfer proofs and an x402 gateway, with the bridge built on extensions to BitVMX.