
Paradigm introduced Provable Address-Control Timestamps (PACTs), a new method to secure Bitcoin holdings like Satoshi Nakamoto's $84 billion without revealing ownership. PACTs work in three steps: silent commitment, waiting, and secure redemption using zero-knowledge proofs, addressing vulnerabilities in pre-2012 Bitcoin addresses. This innovation strengthens Bitcoin's defense against emerging quantum computing threats while preserving decentralization and privacy. It offers a way to protect early Bitcoin funds without forced migration or identity exposure.