TLDR
Bitcoins BIP-110 soft fork triggered a brief chain split, but the minority fork stalled after only two blocks, leaving the main BTC chain unaffected.
- BIP-110-enforcing nodes split at block 961,632, mined just two blocks, and quickly fell dozens of blocks behind the dominant Bitcoin chain.
- The fork kept Bitcoins full mining difficulty while only about 2.5% of blocks signaled support, so almost all hashpower stayed on the main chain.
- For BTC holders, the main chain continues as normal, while the BIP-110 fork faces replay risks, talk of proof of work changes, and likely economic irrelevance.
Deep Dive
1. Fork Emerges Then Stalls
At block height 961,632, nodes enforcing BIP-110 split from Bitcoin when miners produced a block that most nodes accepted but BIP-110 software rejected, creating a minority branch that started at that height. Reports show that the enforcing chain produced only two blocks, 961,632 and 961,633, both mined via Oceans Roughnecks group, before stalling for many hours while the main chain advanced steadily by scores of blocks ahead. Multiple outlets describe the fork as frozen at block 961,633 while the main chain moved past 961,740, widening the gap into the hundreds of confirmations.
The split did happen, but the economic majority immediately stayed with the original Bitcoin chain, turning the fork into a thin minority side branch rather than a live competitor.
2. Why Hashpower Rejected BIP-110
BIP-110 is a user-activated soft fork that tries to temporarily restrict non-financial data in transactions, targeting things like Ordinals inscriptions to reduce what supporters call spam and legal exposure. In practice, miners barely backed it: only 51 of the previous 2,016 blocks, roughly 2.53%, signaled support, far below the 55% threshold built into the proposals activation rules, and none of the first 100-plus main-chain blocks in the signaling window carried the required bit. With that tiny share of hashpower, the minority chain inherited Bitcoins roughly 127 trillion difficulty and could only mine blocks every several hours, while the main network continued at one block about every ten minutes, as highlighted in anti-spam fork coverage.
Bitcoin governance remains strongly aligned with the hashpower and user majority, and attempts to enforce controversial rules without miner support tend to stall rather than flip consensus.
3. Effects On Holders And Next Steps
Because this was a chain split, pre-fork coins exist on both branches, and early analysis warns of replay risk where transactions valid on both chains could move real BTC on the main chain when people think they are only spending on the fork. However, exchanges and infrastructure overwhelmingly follow the dominant chain, and critics like Michael Saylor argue that the BIP-110 branch will stall into irrelevance while Bitcoin continues normally, as seen in post-fork commentary. Some BIP-110 supporters have floated switching the forks proof of work to survive, but without clear economic support that would likely turn it into a niche altcoin rather than a rival Bitcoin.
For most users, the practical takeaway is to treat BTC on the main chain as canonical and be cautious about any offers to trade or claim coins tied to the stalled BIP-110 fork.
Conclusion
The BIP-110 episode shows that even a contentious soft fork can split the chain in theory, but without broad miner and user backing the minority branch quickly stalls and loses relevance. Bitcoins main network, block production, and economic activity remain centered on the original chain, while the fork mainly serves as a case study in how strong the majoritys preference for neutrality and censorship resistance still is.
Confidence: high, supported by multiple independent technical and news reports from the fork window.
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