Bitcoin Two-Block Reorg: Foundry Beats AntPool+ViaBTC

Bitcoin saw a rare two-block reorganization (Bitcoin two-block reorg) after competing mining pools briefly produced parallel chains. Near block heights 941,881–941,882, AntPool and Foundry each mined valid blocks about 12 seconds apart (AntPool 15:49:35 UTC, Foundry 15:49:47 UTC). ViaBTC then added a block to the AntPool branch while Foundry extended its own chain. For a short time, the network had competing two-block segments. Foundry later mined a run of six consecutive blocks, raising cumulative proof-of-work and causing nodes to switch to Foundry’s chain as the canonical ledger. The AntPool/ViaBTC blocks became stale (orphaned), but funds weren’t lost. Transactions inside the stale blocks were returned to the mempool and were reprocessed when included again. The earlier context in the reporting frames this as expected Proof-of-Work behavior under Nakamoto consensus: no exploit, no double-spend, and only a brief consensus divergence. Still, the episode highlights mining concentration and propagation speed—conditions can briefly favor dominant pools, especially when hashrate is slipping and difficulty moves (the article notes a recent ~7.76% downward difficulty adjustment). Trading takeaway: this Bitcoin two-block reorg resolved quickly and did not disrupt user activity, so direct market impact on BTC price is likely limited. The main relevance is to reinforce that pool dominance can shape short-term block outcomes without changing the protocol.