Bitcoin Blockchain Splits Briefly Amid Mining Pool Competition

The Bitcoin blockchain briefly split on September 11, 2026, due to a rare occurrence where two major mining pools found competing blocks at the same height. Antpool and Spiderpool were the two pools involved in this event.

Antpool's block was eventually incorporated into the main chain, while Spiderpool's block was discarded. This type of one-block reorganization is relatively common and does not pose significant security risks to the network.

The incident highlights the natural competition between miners as they strive to validate transactions and secure the blockchain. The Bitcoin network favors the chain with the most accumulated work, which in this case led to Antpool's block being accepted.