The Bitcoin BIP-110 mandatory signaling window will open in less than two weeks, with a current support rate of about 2.64%

The Bitcoin BIP-110 mandatory signaling window will open at block 961632, expected around August 9, 2026. As of the on-chain height of 959842, there are about 1790 blocks remaining until that block, and the support rate for BIP-110 signaling is approximately 2.64%.

BIP-110's formal name is Reduced Data Temporary Softfork, which proposes to limit the size of certain data fields in Bitcoin transactions, mainly targeting Ordinals type inscriptions, large OP_RETURN payloads, and similar high data volume uses. If activated, the restrictions will take effect at block 965664 and will automatically expire after 52416 blocks, approximately one year later.

Current signaling support mainly comes from Ocean, independent miners, and small operators, while major mining pools such as Foundry, Antpool, ViaBTC, and F2pool have not yet shifted to support it. Foundry has requested clients to vote based on average hash power; only if "support" votes exceed 51% of the participating weighted hash power will the pool switch all blocks to support signaling. If the current signaling level persists until block 961632, nodes executing BIP-110 will reject blocks that do not emit version bit 4 signals and will follow the minority of blocks that do emit signals. Non-upgraded nodes will continue to accept both signaling and non-signaling blocks and will follow the chain with the highest accumulated proof of work.