Bitcoin BIP110 Mandatory Signaling Window Opens in Two Weeks; Support at 2.64%

ChainCatcher reports that Bitcoin's BIP110 mandatory signaling window is set to begin at block 961632, projected around August 9, 2026. With the chain currently at height 959842, about 1,790 blocks remain, and signaling support stands at roughly 2.64%. BIP110, formally titled "Reduced Data Temporary Softfork," would cap the size of certain transaction data fields. The proposal is aimed primarily at Ordinals inscriptions, large OP_RETURN payloads, and other high-data-use transaction patterns. If BIP110 is activated, the new limits would take effect at block 965664 and automatically sunset after 52,416 blocks, or about one year. At present, support is largely attributed to Ocean, independent miners, and smaller operators. Major pools including Foundry, Antpool, ViaBTC, and F2pool have not yet moved to signal. Foundry has told customers to vote based on average hash rate. The pool says it will flip all of its blocks to signal only if "yes" votes exceed 51% of the weighted participating hash rate. If signaling remains at current levels through block 961632, nodes upgraded to enforce BIP110 would reject blocks that do not signal version bit 4 and would track the minority chain that does. Nodes that have not upgraded would continue accepting both signaling and non-signaling blocks and would follow the chain with the highest cumulative proof-of-work.