Bitcoin Faces a Contentious Weekend as BIP-110 Raises Risk

of a Network Split

Bitcoin is approaching a potentially important protocol milestone as BIP-110 enters its mandatory signaling phase around August 7, 2026, near block 961,632. The proposal aims to restrict the amount of arbitrary data that can be stored in Bitcoin transactions, but its limited support among miners has raised concerns about a possible chain split if the activation process proceeds without broad consensus.

The debate has become particularly intense because BIP-110 is not simply a technical upgrade. It touches on a long-running dispute over whether Bitcoin should primarily function as a monetary settlement network or also provide significant block-space for applications such as Ordinals and Runes.

What Is BIP-110?

BIP-110 proposes tighter restrictions on arbitrary data embedded in Bitcoin transactions.

Under the proposal:

• OP_RETURN outputs would be limited to 83 bytes.
• Other data insertions would be limited to 256 bytes.
• The stated objective is to reduce what supporters consider excessive or unwanted data usage on Bitcoin's blockchain.
• The changes would particularly affect protocols such as Ordinals and Runes, which use Bitcoin block space for inscriptions and token-related data.

The proposal has therefore become a major point of disagreement between different groups within the Bitcoin ecosystem.

Why Could BIP-110 Split Bitcoin?

The biggest concern isn't necessarily the data limit itself. It is the activation mechanism.

BIP-110 requires approximately 55% of blocks in a 2,016-block difficulty-adjustment period to signal support for the proposal. If the required threshold is reached, the new rules would activate approximately one month later.

The problem is that miner support has remained extremely low.

Recent figures cited by Journal du Coin put signaling at roughly 0.4%–0.8% of blocks, equivalent to around 5 EH/s compared with a total network hashrate of approximately 940 EH/s. Major mining pools including Foundry USA and AntPool had not signaled support at the time of the report.

Adam Back and Michael Saylor Raise Concerns

The proposal has attracted criticism from prominent Bitcoin figures.

Adam Back, CEO of Blockstream, has argued that BIP-110 is technically problematic and that attempting to activate it without sufficient consensus could create a minority fork.

Michael Saylor has also criticized the proposal, describing it as an unnecessary risk to Bitcoin's overall stability.

Their concerns center on the possibility that different groups of nodes could enforce different consensus rules.

What Would a Bitcoin Fork Look Like?

If competing groups enforce incompatible rules, Bitcoin could theoretically divide into separate chains.

For example:

Chain A
Nodes accept blocks according to BIP-110 rules.

Chain B
Nodes continue following the existing rules and reject the BIP-110 restrictions.

This could create uncertainty around:

• Which chain is considered the "real" Bitcoin.
• Exchange support.
• Wallet compatibility.
• Mining economics.
• BTC liquidity.
• Application infrastructure.

Importantly, a chain split is a potential scenario, not a confirmed outcome. BIP-110 could also fail to activate if sufficient support is not achieved.

Ordinals and Runes at the Center of the Debate

At the heart of the disagreement is Bitcoin's limited block space.

Supporters of BIP-110 argue that Bitcoin should prioritize monetary transactions and avoid excessive use of block space for arbitrary data.

Opponents argue that applications such as Ordinals and Runes create additional demand for block space and can generate additional transaction-fee revenue for miners.

That economic argument has become increasingly relevant because Bitcoin's block subsidy decreases after each halving, making transaction fees an increasingly important part of miner economics.

Key BIP-110 Metrics

Market Outlook

Bullish Factors

 BIP-110 could fail to activate if miner support remains insufficient.

 The Bitcoin network has extensive experience resolving contentious protocol debates.

 The controversy could ultimately encourage stronger consensus around future upgrades.

Bearish Risks

 A minority fork could create temporary network fragmentation.

 Exchange and wallet providers could face difficult chain-selection decisions.

 Miner incentives could become more complicated.

 Market sentiment could weaken if investors fear a prolonged consensus dispute.

 Developers, miners, businesses, and node operators may become increasingly divided.

Why This Matters for Bitcoin

BIP-110 highlights one of Bitcoin's fundamental strengths—and challenges: no single organization controls the network.

Changes to Bitcoin's consensus rules require coordination among developers, miners, node operators, businesses, and users.

That decentralized governance protects Bitcoin from unilateral control, but it also means controversial technical changes can take significant time to resolve.

The debate therefore extends beyond OP_RETURN limits. It raises a larger question:

Who gets to decide how Bitcoin's limited block space should be used?

Bigger Picture: Bitcoin's Block-Space Debate Continues

The BIP-110 controversy is another chapter in Bitcoin's long-running scaling and governance debates.

The community remains divided between those who favor a more minimalist monetary network and those who see additional applications as legitimate users of Bitcoin's block space. Journal du Coin notes that the dispute echoes earlier disagreements over Bitcoin's block-size policy, including the 2017 environment that ultimately contributed to the creation of Bitcoin Cash.

The current situation is therefore being watched closely not only by Bitcoin developers and miners, but also by exchanges, investors, and infrastructure providers.

What to Watch Next

The most important developments are:

• Miner signaling during the BIP-110 activation window.
• Positions taken by major mining pools.
• Bitcoin Core and node-operator responses.
• Exchange policies if competing chains emerge.
• Developer discussions around Ordinals and Runes.
• Whether BIP-110 gains enough support to activate.

The coming days could provide a clearer picture of whether the proposal fades away, gains unexpected support, or creates a deeper governance conflict.

Final Take

BIP-110 has placed Bitcoin's decentralized governance model under another major stress test. The proposal seeks to restrict arbitrary data storage, particularly affecting use cases such as Ordinals and Runes, but its low miner support and controversial activation mechanism have raised concerns about a potential network split.

For Bitcoin holders, the most important point is that a fork is not inevitable. The immediate focus is whether BIP-110 can obtain meaningful network support and whether developers, miners, businesses, and users can reach consensus before activation becomes a realistic possibility.

The BIP-110 debate could ultimately become less about a technical limit and more about Bitcoin's future direction, block-space economics, and the meaning of consensus itself.