The Bitcoin blockchain split into two competing chains on August 8 after nodes running BIP-110—a Bitcoin Improvement Proposal—entered a mandatory-signaling phase requiring blocks to carry an approval signal. The divergence emerged between nodes enforcing the proposed rules and the broader network, where miner support remains limited. Chain splits of this nature, while uncommon on Bitcoin's mainnet, are not without precedent: the network experienced a high-profile division in 2017 when Bitcoin Cash separated via a hard fork over a related scaling and governance dispute.

The split originated at block 961,632, when Antpool, one of Bitcoin's largest mining pools, produced a block without the required BIP-110 signal. The majority of nodes accepted that block as valid, while nodes enforcing BIP-110 rejected it and instead recognized a separate block produced by Roughnecks, a miner associated with Ocean.

The BIP-110 activation has produced a parallel Bitcoin chain whose nodes reject any block lacking the required approval signal, despite the proposal commanding very limited mining support.

BIP-110 Creates a Parallel Chain

Mandatory signaling differs from a conventional activation process because participating nodes begin enforcing proposed rules without requiring approval from a majority of miners. Consequently, nodes following BIP-110 can reject blocks that remain valid under the rules observed by the majority of the network.

The divergence quickly became apparent in chain heights. While the main Bitcoin chain advanced to block 961,640, the BIP-110 chain remained at block 961,633—seven blocks behind. This gap indicates that the BIP-110 chain currently commands substantially less mining power. A chain supported by only a small number of miners may face slower block production and could eventually cease advancing if sufficient mining participation does not materialize. For users, the practical consequence is that any Bitcoin held on the minority chain would require wallet or exchange support to access, and most major services are expected to follow the majority chain.

The immediate significance of the split therefore lies not only in the technical enforcement of BIP-110 but also in whether enough miners ultimately choose to support its rules. Without broader participation, the minority chain may struggle to maintain consistent block production.

Dispute Over Non-Financial Data

The disagreement behind BIP-110 is part of a wider debate within the Bitcoin community regarding the role of non-financial data on the blockchain.

BIP-110 proposes limiting the inclusion of non-financial data, including Ordinals inscriptions, for a period of one year. Supporters contend that permanent storage of such information imposes additional burdens on node operators and increases the volume of data that participants must maintain.

Opponents favor a more neutral approach, arguing that transactions should generally be accepted when they comply with network rules and pay the required fees, regardless of whether their content is financial or non-financial in nature.

The dispute intensified following the Bitcoin Core v30 update in October 2025. That update altered the default policy surrounding OP_RETURN and effectively removed the previous 83-byte default limit. Critics of the change argued that the expanded data capacity could encourage unwanted blockchain usage and potentially facilitate the inclusion of problematic material.

BIP-110 Emerges From Earlier Proposal

The current proposal developed from BIP-444, another effort to address the treatment of non-financial data on Bitcoin. Developers and community members have remained divided over whether node operators should have greater control over the types and volume of data stored through transactions.

Among the supporters of restricting such data is Ocean Chief Technology Officer Luke Dashjr, who has argued that persistent non-financial data creates long-term costs for the broader node ecosystem. On the opposing side, Strategy Chairman Michael Saylor joined the debate in July, reflecting the disagreement among prominent Bitcoin participants.

The dispute highlights a fundamental governance question for Bitcoin: whether the network should impose tighter restrictions on non-financial blockchain data or continue allowing valid fee-paying transactions under a more neutral policy.

BIP-110 Activation – Automatic Alerts New Block Found Blocks this period: 2 Read our BIP-110 Q&A here: pic.twitter.com/7Lms9xM9jX — Farside Investors (@FarsideUK) August 8, 2026

Network Stability Remains the Key Test

The BIP-110 chain's ability to survive will depend largely on whether its miner base expands. At present, the significant difference in chain height indicates that the majority network retains a substantial advantage in mining power.

The split does not necessarily mean that Bitcoin as a whole has permanently divided. Rather, it represents the emergence of a minority chain following a different set of consensus-enforcement rules. Its long-term viability will depend on sustained participation from miners, node operators, and users.

The development also illustrates the consequences of attempting to enforce controversial consensus changes without broad network agreement. BIP-110's early divergence from the main chain demonstrates that technical rule changes can create competing network histories when miners and node operators fail to reach sufficient consensus.

As Bitcoin continues to process blocks under the competing rule sets, the coming period will offer a clearer indication of whether BIP-110 can attract enough support to remain operational or whether its minority chain will gradually lose relevance.