Bitcoin BIP-110 fork flops, exposing deep governance rifts

In the lead-up to BIP-110's activation window opening around August 9, 2026, miner signaling remained strikingly low at just 2.64%, despite growing traction among node operators using modified Bitcoin Knots software. This disconnect underscored a fundamental governance tension within the Bitcoin community between miners, who secure the network, and node runners advocating for spam prevention measures. Prominent figures like Blockstream CEO Adam Back publicly criticized the proposal for its low 55% activation threshold, warning it risked a contentious minority fork if forced without broad consensus.

Michael Saylor emerged as a leading voice opposing BIP-110, framing Bitcoin's consensus rules as a constitutional safeguard protecting the economic rights of all participants. He condemned BIP-110 as a 'constitutional crime' that censors valid fee-paying transactions and weakens the fee market, which is vital as block subsidies halve over time. Saylor extended his critique to other proposals involving covenants and larger blocks, arguing that any faction attempting to rewrite Bitcoin’s rules imposes undue costs and risks on the entire network, threatening Bitcoin’s censorship-resistant monetary purpose.

The governance debates around BIP-110 revealed a deep ideological divide regarding Bitcoin’s core purpose: whether it should remain a censorship-resistant monetary protocol or evolve into an open data network accommodating arbitrary content like JPEG images and Ordinals. Proponents, including BIP-110 author Dayton Ohm, framed the proposal as a necessary anti-spam measure to protect scarce blockchain resources and full nodes from long-term costs, rejecting censorship accusations. Meanwhile, opponents accused supporters of authoritarian censorship, though many acknowledged the complexity of spam management and the need for nuanced, long-term discussions rather than emergency measures.

The unfolding BIP-110 debate exemplified Bitcoin’s decentralized governance model, where no central authority dictates protocol changes but rather miners, nodes, users, and economic incentives collectively shape outcomes. This dynamic was vividly illustrated as miner support lagged near zero despite rising node signaling, fueling broader concerns about the risks of low activation thresholds enabling contentious forks. The controversy highlighted ongoing tensions between preserving Bitcoin’s openness and monetary focus versus implementing technical changes aimed at mitigating perceived threats from data spam on the blockchain.

By the critical activation deadline in early August 2026, Bitcoin’s BIP-110 soft fork spectacularly failed to garner the necessary 55% miner support threshold, with signaling languishing at a mere 1-2%, as highlighted by Matt Kratter and confirmed by Michael Saylor’s declaration of the proposal’s death for this mining difficulty cycle. This stark shortfall underscored the mathematical impossibility of activation within the current cycle and effectively sealed BIP-110’s fate, illustrating the decisive power miners wield in protocol upgrades and the futility of node operators’ resistance when miner consensus is absent.

The collapse of miner support during BIP-110’s activation period laid bare the risks inherent in low activation thresholds and the growing centralization of mining power, particularly among large regulated mining pools. As critics warned, entrusting rule changes to a handful of dominant miners threatens to marginalize the broader community of node operators, potentially ceding control of Bitcoin’s governance to corporate interests rather than the decentralized 'pleb node runners' that have historically underpinned the network’s resilience.

The activation phase also exposed a complex game theory dilemma for miners facing the prospect of a contentious chain split: early adopters of the BIP-110 chain could capitalize on a strategic advantage by mining the longer chain first, potentially wiping out legacy chain rewards and reshaping the network’s future. This high-stakes gamble intensified the uncertainty surrounding miner signaling, as hesitant miners weighed the risks of abandoning the legacy chain against the potential rewards of pioneering the new fork, further contributing to the fragmented and cautious response to BIP-110.

At block 961,632, the Bitcoin network experienced a highly contentious split as dissident nodes running Bitcoin Knots began enforcing BIP-110, rejecting blocks that did not signal support for the proposal and fracturing the once-unified ledger. This schism starkly polarized the community between ‘purists’ who viewed the data inscription innovations as a direct threat to Bitcoin’s foundational protocol, and proponents eager to explore new use cases, echoing ideological divides reminiscent of the 2017 blocksize wars.

Despite the fervent ideological commitment and mass migration of BIP-110 supporters to Bitcoin Knots, the minority chain rapidly collapsed within just eight hours and two mined blocks after the split. Lacking sufficient computing power, the BIP-110 chain quickly fell 112 blocks behind the main chain with no realistic chance of recovery, underscoring that rhetorical zeal could not substitute for the raw hash rate necessary to sustain a competing Bitcoin ledger.

The aftermath of the failed mutiny left the Bitcoin community deeply divided, with some observers choosing a neutral stance amid the uncertainty. As one analyst recounted, opting for a ‘Swiss’ approach by running Bitcoin Knots without upgrading to BIP-110 reflected the broader hesitation and fragmentation within the ecosystem, highlighting the complex governance challenges and the high stakes involved in attempting to steer a trillion-dollar network through contentious protocol changes.