Bitcoin plans to introduce a quantum-safe solution to provide a "rescue after freezing" path for old addresses.

CoinFeed reported on May 2nd that, according to CoinDesk, Paradigm partner Dan Robinson proposed a new scheme called "Provable Address-Control Timestamps" (PACTs), aiming to reserve a quantum-safe rescue channel for early Bitcoin addresses before the advent of quantum computers. This scheme allows coin holders to use BIP-322 to generate a signature proving their current control of an address, and then privately stamp it on-chain using OpenTimestamps with a random salt, without moving the assets. If Bitcoin freezes quantum-vulnerable old addresses through a soft fork in the future, the network can, after introducing quantum-resistant STARK verification, accept zero-knowledge proofs submitted by coin holders to verify that they controlled the address before the quantum era, thereby releasing the frozen assets.