Foundry USA Wins Mining Race, Triggering Two-Block Reorg
The Bitcoin blockchain experienced a rare two-block reorganization on March 23, 2026, after an intense competition between mining pools caused a temporary network split. The event began at block height 941880, where the network diverged into two competing chains. AntPool mined block 941881, which was followed by ViaBTC mining block 941882 on the same chain.
Simultaneously, the mining pool Foundry USA produced its own version of blocks 941881 and 941882. The tie was decisively broken when Foundry extended its chain by successfully mining blocks 941883, 941884, and 941885. This established Foundry's chain as the longest and, therefore, the canonical one. As a result, the two blocks originally mined by AntPool and ViaBTC were discarded, becoming orphaned blocks in a rare event that saw Foundry secure seven consecutive blocks in total, from 941879 to 941885.
Event Confirms Network Rules but Highlights Finality Risk
This reorganization was not a network failure or malicious attack but rather a demonstration of Bitcoin's proof-of-work consensus mechanism functioning as designed to resolve a temporary fork. While single-block reorganizations happen periodically, a two-block reorg is significantly less common because it requires a competing chain to match the original for two consecutive block cycles.
The primary implication for investors and users is a practical reminder that transaction finality on Bitcoin is probabilistic, not instantaneous. Any transactions included in the two orphaned blocks were effectively reversed from the ledger before being re-included on the authoritative chain. This underscores the industry-standard practice of waiting for several confirmations—typically six—before considering a high-value transaction settled, mitigating the inherent, though rare, risk of a chain reorganization.
Edgen Crypto·Mar 23 2026, 22:45
