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Bitcoin Blocks Keep Skipping BIP-110 Signal as Mandatory Window Opens

5 min read
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TL;DR

  • Bitcoin reached block 961,642 at about 22:28 UTC, leaving 11 observed blocks in BIP-110's stated mandatory-signaling range.
  • None of the blocks from 961,632 through 961,642 had bit 4 set in the version field, although BIP-110 says that bit is mandatory in its proposed window.
  • The observed chain data does not confirm a Bitcoin fork or BIP-110 activation. It shows the proposal's signaling condition was not visibly enforced across the live main chain in this snapshot.
  • BTC traded near $64,954, up about 0.10% in 24 hours, while the Crypto Fear and Greed Index read 30, or Fear.

CASABLANCA, August 8, 2026

Bitcoin’s main chain produced 11 observed blocks without BIP-110’s bit-4 signal after the proposal’s mandatory-signaling window began, with the chain at block 961,642 at about 22:28 UTC Saturday as BTC traded near $64,954.

The latest mempool.space block record placed the tip at 961,642. Version-field checks for each block from 961,632 through 961,642 showed bit 4 unset, while the BIP-110 specification says that bit is mandatory in its proposed 2,016-block window.

This is a material escalation from an earlier report in which only the first three blocks had skipped the signal. What changed is the count: the observed non-signaling run had grown to 11 consecutive main-chain blocks as of this check, not that Bitcoin had activated the proposal or split into competing chains.

Bitcoin’s market capitalization was about $1.30 trillion and 24-hour volume about $12.47 billion, according to the market snapshot reviewed for this report. CoinMarketCap’s Bitcoin page is a current public market reference.

Bitcoin

BTC
July 9 to August 8, 2026
$64,954
+4.3%
Jul 9 - Aug 8 | High $65,185 Low $62,247

Bitcoin’s BIP-110 Window Has 11 Non-Signaling Blocks

The narrow, verified point is about the chain data, not a verdict on Bitcoin governance. BIP-110 assigns bit 4 to a proposed reduced_data deployment and says mandatory signaling runs from block 961,632 through 963,647.

The specification states that the bit is included in vbrequired during that period. Its stated rule would treat blocks without the signal as invalid, yet the observed main chain continued with all 11 reviewed version fields lacking bit 4.

BIP-110 is a document in the Bitcoin BIPs repository, even though its listed status is Complete. A published BIP does not by itself place new validation rules on Bitcoin nodes, and the first 11 non-signaling blocks are evidence that its mandatory rule was not visibly enforced across the live chain at the time checked.

The proposal describes itself as a Reduced Data Temporary Softfork. It would limit several data-carrying formats for new transactions, including certain output scripts, data pushes and Taproot constructions, if it reached its specified activation stage.

Missing Bit 4 Does Not Confirm a Bitcoin Fork

The distinction matters because block-version data can show what miners placed in blocks, but it cannot by itself measure every node operator’s software choice or establish broad economic support. The chain data in this report does not show that BIP-110 is active, and it does not establish a fork.

No public evidence reviewed for this update showed an interruption to ordinary Bitcoin transfers, a competing main-chain tip, or an activation notice from Bitcoin Core. Holders therefore do not have a public, chain-level instruction to move standard balances on the basis of these 11 blocks.

The BIP says that UTXOs created before activation would be grandfathered. Its discussion of potential edge cases is limited to certain pre-signed Taproot constructions, rather than a general problem with existing Bitcoin holdings.

Miner indications remain one piece of a broader process. Foundry’s earlier hashrate-weighted client vote illustrated the separate question of how a pool plans to signal, while node operators ultimately decide which rules they validate.

The latest data also raises the bar for claims that the proposed mandatory stage is already operating in practice. As each additional non-signaling block remains on the main chain, the observable gap between BIP-110’s written rule and live-chain behavior becomes less a countdown and more an ongoing adoption test.

Block 963,648 Is the Next BIP-110 Deadline

BIP-110 sets a 55% threshold, or 1,109 blocks in a 2,016-block period, and says the deployment would be locked in no later than height 963,648. It then places the proposed ACTIVE state at height 965,664 and says the restrictions would last 52,416 blocks, about one year.

Those heights are schedule parameters, not a confirmation that the network will take the stated transitions. The 11 blocks reviewed here sit only at the beginning of the mandatory range, so miner notices, node-software releases and continued block-level evidence are more informative than a calendar estimate.

The controversy is separate from Bitcoin’s other upgrade and security discussions, including the quantum-readiness work that drew a $15 million consortium. BIP-110 instead concerns arbitrary data and the conditions under which a temporary consensus restriction could gain effect.

Fear & Greed Index

August 8, 2026
30 Fear

The Crypto Fear and Greed Index was at 30, or Fear. The next concrete checks are whether blocks nearer 963,648 begin carrying bit 4, whether any deployed client enforces a matching rule, and whether claims of lock-in can be confirmed from the chain rather than inferred from the BIP timetable.

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Fact-checked by: Daily Crypto Briefs Fact-Check Desk

Frequently Asked Questions

Did Bitcoin activate BIP-110 when the mandatory-signaling window began?

No. The report found that eleven observed blocks after the stated start height lacked BIP-110's bit-4 signal. BIP-110 itself schedules activation at block 965,664 after a lock-in stage, but neither activation nor a fork was established by this block-data check.

What does it mean that Bitcoin blocks lack BIP-110 bit 4?

BIP-110 assigns bit 4 to its proposed reduced_data deployment and says the bit is mandatory from blocks 961,632 through 963,647. Blocks without it remaining on the observed main chain indicate the proposal's stated signaling rule was not visibly being enforced network-wide in this snapshot.

Do Bitcoin holders need to move funds because of BIP-110?

No public chain evidence reviewed for this report showed a main-chain split, failed ordinary Bitcoin transfers or an instruction for holders to move normal balances. The BIP also says UTXOs created before any activation would be grandfathered.

What is the next BIP-110 block height to watch?

BIP-110 names block 963,648 as the no-later-than lock-in height and block 965,664 as its proposed activation height. Those are specifications, not confirmations that the Bitcoin network will adopt the proposal.