CryptoSlate
Bitcoin's blockchain split into two competing chains overnight after BIP-110, a contested protocol upgrade, triggered a hard fork on July 4, 2026. Mining pools responded with a coordinated boycott, leaving the BIP-110-enforcing chain operating on just 0.42% of network hash rate, per BGeometrics data covering miner signaling since May 1. The result is a lopsided split where one side runs near-full hash power and the other runs on a skeleton crew.
Why it matters
Chain splits are historically rare on Bitcoin and represent the kind of event that tests the network's settlement assurances. The 0.42% signaling rate shows BIP-110 never had miner consensus going into the fork. Farside's alerts make the August lock-in window harder for exchanges, wallets, pools, and node operators to ignore, forcing a public resolution before the situation deteriorates.
Market impact
The BIP-110 chain's minimal hash power leaves it exposed to reorg attacks and double-spend risk until exchanges pick a side. Liquidity could fragment between the two chains in the short term, and traders will likely read the split as a settlement-integrity shock for Bitcoin until one side wins decisively.
Frequently asked questions
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What is BIP-110 and what triggered the Bitcoin chain split?
BIP-110 is a proposed Bitcoin protocol upgrade that triggered a contentious hard fork on July 4, 2026, splitting the blockchain into two competing chains overnight.
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Why are miners boycotting the BIP-110 chain?
Mining pools withheld hash power from the BIP-110-enforcing side. BGeometrics data shows only 0.42% of network hash rate signaled support since May 1, leaving that chain running on a fraction of total hash power.
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What risks does a low-hash-rate Bitcoin chain face?
A minority chain with minimal hash power is exposed to reorg attacks and double-spend risk. Without enough mining securing blocks, settlement assurances break down for the BIP-110 side.
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What is the August deadline for exchanges after the Bitcoin chain split?
Farside's alerts tied to an August lock-in window force exchanges, wallets, pools, and node operators to publicly declare which chain they will support before the situation deteriorates further.
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How does a Bitcoin chain split affect BTC price and liquidity?
Traders read chain splits as a settlement-integrity shock in the short term, with potential liquidity fragmentation between the two chains until one side wins decisively or the chains reconcile.
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