BTC faces chain split risk from BIP-110

TLDR

Bitcoin (BTC) is approaching a technical deadline where BIP-110 could create a minority forked chain, but broad support is very low and the main chain is unlikely to be disrupted.

1. BIP-110 is a temporary reduced data soft fork that would limit non-financial data in Bitcoin transactions, and its rules could cause some nodes to reject blocks others accept.
2. Miner signaling for BIP-110 is only around 23 percent, far below the 55 percent threshold, and major pools, exchanges, and institutional holders have not backed the proposal.
3. The most realistic outcomes are either a small side chain with limited impact or the proposal being abandoned, though the fork window is still a risk to watch closely.

Deep Dive

1. What BIP-110 Actually Does

BIP-110, the Reduced Data Temporary Softfork, aims to cap certain data elements in Bitcoin transactions for about one year, mainly targeting Ordinals-style inscriptions and token protocols rather than regular payments or Lightning transfers.

By instructing BIP-110 nodes to reject blocks that do not signal support after a given height, the proposal changes what those nodes consider a valid block. That is where chain split risk arises: one set of nodes would follow BIP-110 rules, while others continue with current consensus.

Reporting on BIP-110s design and goals highlights the intent to slow blockchain growth and reduce node costs, but also notes concerns about Bitcoin neutrality and policing transaction data.

2. How Much Support BIP-110 Has

Miner support is extremely low. Recent tallies show roughly 2.42.7 percent of blocks signaling yes, far short of the 55 percent voluntary threshold and mathematically unable to reach it in the current period, as detailed in Saylors analysis of 2.53 percent signaling.

Large mining pools such as Foundry, AntPool, F2Pool, and ViaBTC are not signaling. Major exchanges and custodians have also avoided committing to list or recognize any forked asset. Institutional holders like spot ETFs and corporate treasuries dominate todays Bitcoin ownership and may be unable or unwilling to treat a minority fork as Bitcoin, as noted in the discussion of institutional holders and fork support.

An earlier claim that activation was delayed after the Coldcard exploit was later corrected, with the author confirming that the schedule remains in place in an update on mandatory signaling.

Confidence: moderate because miner data and public statements are clear, but node operator behavior during the fork window is still unknown.

3. Scenarios And What To Watch

From the upcoming mandatory signaling height, BIP-110 nodes are configured to reject non-signaling blocks, even with weak miner backing. That could create a slow, minority chain that follows BIP-110 rules while most hashpower continues on the existing chain.

Key scenarios are:

1. BIP-110 backers stand down or revert software, and no meaningful fork occurs.
2. A small side chain emerges, with limited hashpower, liquidity, and exchange support, functioning more as an experiment than a rival to BTC.
3. In a higher-risk case, some infrastructure misconfigurations or unexpected support cause short-lived confusion in wallets, explorers, or custodians during the fork window.

Conclusion

BIP-110 does introduce a real, time-bound chain split risk, but current signaling, institutional posture, and infrastructure plans point toward either a minor side chain or a backed-down upgrade rather than a fundamental break in Bitcoin. The important link between rules and outcomes is clear: without broad miner and economic support, any BIP-110 chain is likely to remain marginal while the existing Bitcoin network continues as the de facto main chain.