A minority Bitcoin chain created by BIP-110 supporters produced just two blocks in eight hours before stalling, while both networks still accept identical transactions.
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Bitcoin BIP-110 fork stalls 48 blocks behind as replay risk grows
Bitcoin's BIP-110 breakaway chain stalled at block 961,633 after mining two blocks, leaving holders exposed to replay attacks while the main chain advanced 48 blocks to 961,681, according to the BIP-110 situation monitor. Bitcoin traded at $64,738.60 as of 01:00 UTC on Aug. 9, down 0.34 percent.
"Anyone holding 10 BTC before the fork would initially control 10 coins on each resulting chain," Kevin Loaec, a Bitcoin developer, warned on X. "A buyer could copy the transaction used to transfer the forked coins and broadcast it on the main Bitcoin network, moving the same amount of real BTC."
The split began at block 961,632, when nodes enforcing BIP-110 — formally the Reduced Data Temporary Softfork — began rejecting any block that did not signal support through bit 4. The proposal restricts images, text and other non-payment data stored in Bitcoin transactions for about one year. Miner support stood near 2.6 percent, far below the 55 percent threshold needed for activation without a split.
The breakaway chain inherited Bitcoin's mining difficulty of 127.48 trillion with only a tiny share of hashpower, leaving blocks hours apart. The monitor projects the minority chain needs roughly 350 days to complete a difficulty adjustment, against 14 days for the main network. AntPool mined the first non-signalling block the main chain accepted, while an Ocean-linked miner produced the alternative the breakaway branch followed.
BIP-110 does not include replay protection. Until the chains produce coins unique to their respective histories, ordinary transactions remain valid on both, so spending forked coins could unintentionally transfer an equivalent amount of real BTC. The mandatory signaling window runs from block 961,632 through 963,647, with lock-in no later than 963,648 and data restrictions active at block 965,664, expected around early September.
Supporters are pushing BIP-110 as a user-activated soft fork, relying on node operators rather than miners to force the rule change, citing the 2017 SegWit activation as precedent. US holders could also face tax and record-keeping questions if the minority-chain coins acquire a market value. Blockstream chief executive Adam Back and Strategy chairman Michael Saylor have both opposed BIP-110, citing censorship and chain-split concerns, while Bitcoin developer Luke Dashjr continues to support the proposal on the grounds that non-payment data raises storage costs. Holders who cannot verify their coins are separated face the lowest replay risk by leaving balances unmoved until wallets, exchanges and miners clarify which chain they support.
This article is for informational purposes only and does not constitute investment advice.
