According to @BitMEXResearch, Bitcoin's total accumulated proof-of-work (chainwork) has just crossed 2^96 on December 21, 2025. Source: BitMEX Research tweet dated December 21, 2025. Accumulated proof-of-work, also called chainwork, is the sum of expected hashes securing the best chain and grows with block difficulty and height, marking a new record depth of security at this threshold. Source: Bitcoin Core developer reference on chainwork and difficulty. Higher chainwork raises the cost of deep chain reorganizations and the probability of an attacker catching up drops exponentially with confirmations, strengthening on-chain settlement assurances relevant to traders moving large BTC. Source: Satoshi Nakamoto, Bitcoin whitepaper (2008) on confirmation probability. This milestone does not change Bitcoin’s issuance schedule or target block interval, but it underscores the robustness backing exchange deposits, withdrawals, and on-chain collateral flows that traders rely on. Source: Bitcoin Core consensus rules on monetary policy and block interval.