Bitcoin just had a 2-block reorg. Foundry wound up mining 7 blocks in a row and rewrote two of AntPool/ViaBTC's blocks out of history. At blocks 941881–941882, Foundry and AntPool/ViaBTC were racing on competing chains simultaneously. Foundry won and their chain became the best chain. AntPool and ViaBTC's two blocks became stale. They are now orphaned, never to be part of the permanent ledger. You can verify it yourself on fork.observer Quick explainer on what a reorg actually is: Bitcoin's rule is simple: the chain with the most cumulative work wins. Sometimes two miners find a valid block at nearly the same time. The network splits briefly, with some nodes following one chain and others following another. The tie gets broken when someone mines the next block on top of one of them and the longer chain wins. The losing blocks become "stale" and are discarded entirely. Those miners get nothing. A 2-block reorg means this race extended across two consecutive blocks before resolving. This is rare but not unheard of. H/t @0xB10C
