BTC faces chain split risk over BIP-110

TLDR

Bitcoin (BTC) faces a controversial BIP-110 soft fork that could spin off a minority chain if enforcing nodes reject blocks the rest of the network accepts.

1. BIP-110 would temporarily limit non-financial data in transactions, and its mandatory signaling phase instructs BIP-110 nodes to reject non-signaling blocks, creating the chain split risk.
2. Miner support is stuck around 23%, far below the 55% threshold, so any forked BIP-110 chain would almost certainly be small while the main Bitcoin chain continues as usual.
3. The key things to watch are block 961,632, node-operator decisions to revert BIP-110, and whether major exchanges or custodians recognize any forked asset at all.

Deep Dive

1. What BIP-110 Actually Changes

BIP-110 is a one-year Reduced Data Temporary Softfork that caps certain data elements in Bitcoin transactions, mainly targeting Ordinals-style inscriptions and token protocols to reduce node costs and blockspace spam. Reports explain that it ships in Bitcoin Knots rather than Bitcoin Core, and ordinary payments and Lightning transfers are designed to be unaffected.

Activation has two stages. The voluntary stage required 55% of blocks in a difficulty period to signal yes. That has decisively failed, with only about 2.5% signaling in recent tallies. In the mandatory stage starting around block 961,632, BIP-110 nodes are set to reject blocks that do not signal yes, regardless of hashpower, which is where a chain split can occur into a minority BIP-110 chain and the main chain.

2. Support Levels And Fork Odds

Multiple analyses show BIP-110 is far from miner consensus, with roughly 2.52.7% signaling versus the 55% threshold, and even perfect future signaling cannot reach the required count in this round. Most support appears concentrated in a single pool group, while major pools such as Foundry, Antpool, F2Pool, and ViaBTC have not signaled.

Earlier coverage claimed activation was delayed after a Coldcard wallet exploit, but follow-up reporting clarifies the schedule on the proposal site has not changed; instead, some BIP-110 advocates have urged operators to revert to standard nodes, which would shrink the enforcing set. Major exchanges and large custodians have not committed to listing any forked token, and institutional holders are widely expected to treat a tiny BIP-110 chain as a side experiment rather than real Bitcoin.

3. What Crypto Users Should Watch Next

Three practical signals matter:

1. The block height around 961,632, when mandatory signaling rules start for BIP-110 nodes.
2. Whether node operators, mining pools, and services publicly confirm they have removed BIP-110 code, which directly reduces split risk.
3. Guidance from major exchanges, custodians, and ETF providers on whether they will recognize or ignore any forked asset.

Short-term, fork chatter can still move sentiment and volatility, especially if some traders buy ahead of a snapshot hoping for duplicate coins, then sell after. Historically, the main BTC chain has remained dominant after contentious forks.

Conclusion

BIP-110 introduces real chain split mechanics at the software level, but with extremely low miner signaling and little institutional or exchange backing, the dominant outcome is a stable main Bitcoin chain and, at worst, a small experimental fork. For most BTC holders, the primary risk is short-term narrative-driven volatility rather than loss of their main-chain coins.