BitMEX Research has introduced a 'canary' system proposal to address potential quantum computing threats to Bitcoin. This system aims to prevent a full-scale freeze of Bitcoin by targeting only quantum-vulnerable coins if a quantum computer is proven to exist. Unlike the recently merged BIP-361, which suggests a phased freeze approach, the canary system would only trigger a freeze upon on-chain proof of a quantum computer, using a special Bitcoin address created with a Nothing-Up-My-Sleeve Number system. The proposal also includes a 'canary fund,' where users can voluntarily deposit Bitcoin as a bounty to incentivize quantum-capable entities to reveal their capabilities. This approach seeks to balance security with Bitcoin's core principles, though it acknowledges risks such as insufficient bounty size to deter exploitation. Additionally, a 'safety window' concept is being explored to allow transactions with temporary output locks even after restrictions begin.