A Bitcoin fork built around the contested BIP-110 proposal split from the main chain at block 961,632 and has fallen 48 blocks behind it, producing new blocks roughly every 6.9 hours instead of the usual ten minutes. Blockstream CEO Adam Back and Strategy's Michael Saylor called the split a failure of miner support, while BIP-110's chief backer, Luke Dashjr, rejected that verdict.
Bitcoin has undergone the chain split that critics of BIP-110 had warned could occur once the proposal reached its signaling phase without meaningful miner support. The split occurred at block 961,632, according to data from BIP-110 monitoring infrastructure cited by Bitcoin commentators, and the resulting branch has struggled to produce blocks ever since.
Fork branch falls 48 blocks behind
At press time, the standard Bitcoin chain had reached block 961,681, while a BIP-110-enforcing node sat at block 961,633 — a gap of 48 blocks, the monitoring data showed. Bitcoin's normal block-production target is about one block every ten minutes, but the BIP-110 branch has been producing blocks at an average interval of roughly 6.9 hours. The overwhelming majority of Bitcoin's mining power has continued extending the conventional chain instead.
Back and Saylor call it a failure
Blockstream CEO Adam Back reacted with derision. According to Back: "They forked off and found out." Earlier, Strategy executive chairman Michael Saylor had warned that BIP-110 drew only 2.6% miner signaling and predicted the branch would stall or fork into irrelevance while Bitcoin continued to operate normally.
What BIP-110 would have restricted
BIP-110 was designed to restrict the amount and types of arbitrary, non-financial data that can be embedded in Bitcoin transactions. The proposal was authored under the pseudonym Dathon Ohm, with Luke Dashjr, a longtime Bitcoin developer and Bitcoin Knots maintainer, serving as its main advocate. Its supporters argue Bitcoin was designed as a peer-to-peer monetary system rather than a general-purpose data-storage network.
But Bitcoin Core developers countered that restrictive policies were ineffective because data could still find alternative routes into blocks. In 2025, Bitcoin Core 30 moved toward a dramatically higher default OP_RETURN limit, raising it from 83 bytes to 100,000 bytes.
Dashjr says the fork hasn't failed
Luke Dashjr rejected the idea that BIP-110 had failed, accusing opponents of deliberately misrepresenting the situation and urging supporters to ignore what he called their lies. He acknowledged that the BIP-110 chain was producing blocks more slowly than the main network, but he described the slowdown as tolerable.
Source: U.Today
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