Paradigm General Partner Dan Robinson proposed the "Provable Address Control Timestamps" (PACTs) mechanism, designed to provide a protection path for Bitcoin addresses under the potential threat of quantum computing. This scheme allows holders to generate address control proofs via BIP-322 and combine this with random salt to generate on-chain commitments, using OpenTimestamps for time anchoring, thus establishing proof of ownership without disclosing wallet information. If quantum-vulnerable addresses are frozen via a soft fork in the future, users can submit STARK zero-knowledge proofs to unlock their assets upon spending. This mechanism also provides a potential recovery path for wallets derived from BIP-32, but its implementation still relies on Bitcoin introducing STARK verification capabilities and gaining community consensus. (CoinDesk)