Bitcoin BIP-110 enters mandatory phase at 2.53% support
Bitcoins contentious BIP-110 test has moved from signaling into an actual chain split, and the first hours show miners overwhelmingly continuing to build on the existing Bitcoin chain. The proposal entered mandatory signaling at block 961,632 on Aug. 8 after only 51 of the previous 2,016 blocks, or 2.53%, signaled support. Nodes enforcing BIP-110 then began rejecting blocks without version bit 4. The latest available BIP-110 monitoring data on Aug. 9 showed the enforcing branch stalled at block 961,633 after producing only two blocks. Bitcoins non-enforcing chain had already reached 961,731, putting it 98 blocks ahead. The tracker also showed no BIP-110 signaling among the first 100 blocks of the new difficulty period on the dominant chain. With only 2.6% miner signaling, BIP-110 has failed to earn broad miner support. At block 961,632, its nodes will reject non-signaling blocks. BIP-110 will then stall or fork into irrelevance while Bitcoin continues normally. Bitcoin is working as designed. — Michael Saylor (@saylor) August 8, 2026 Bitcoin BIP-110 split widens after miner support stays low The split began because BIP-110 applies different validity rules during its mandatory signaling window. According to the official BIP-110 specification, enforcing nodes must reject any block between heights 961,632 and 963,647 that fails to