Miner signaling for BIP-110 sits at 2.56%, far short of the 55% needed to lock in the proposal. The mandatory signaling window opens today at block 961,632; enforcing nodes will reject any block that doesn’t signal support, regardless of the eventual outcome. Separately, developer Chris Guida has rebased a 2017 proof-of-work hard-fork code as a contingency, a plan its own contributors describe in sharply different terms.
Bitcoin’s Data-Restriction Deadline Arrives at 2.56% Support
With only 2.6% miner signaling, BIP-110 has failed to earn broad miner support. At block 961,632, its nodes will reject non-signaling blocks. BIP-110 will then stall or fork into irrelevance while Bitcoin continues normally. Bitcoin is working as designed.
— Michael Saylor (@saylor) August 8, 2026
Bitcoin’s mandatory signaling window for BIP-110 opens today at block 961,632, with miner support for the proposal stuck at 2.56%, less than a twentieth of the 55% share needed for voluntary lock-in. From this block through block 963,647, any node running Bitcoin Knots (an alternative Bitcoin software client) with BIP-110 enforcement turned on will reject every block that doesn’t set version bit 4, the flag miners use to signal readiness, whether or not the 55% bar is ever cleared. Lock-in, if it happens, must occur no later than block 963,648; full activation of the new rules would follow at block 965,664.
What BIP-110 Actually Changes, and Why It Exists
BIP-110, formally the Reduced Data Temporary Softfork, would impose a one-year set of consensus restrictions on Bitcoin transactions. BIP-110 caps most new output scripts at 34 bytes, OP_RETURN at 83 bytes, and most data pushes at 256 bytes, per the proposal’s text in Bitcoin’s BIPs repository. Existing coins are grandfathered in, and the rules expire automatically about a year after activation.
The proposal was authored under the pseudonym Dathon Ohm, with longtime Bitcoin Core contributor Luke Dashjr credited in the repository itself for the original draft and advice. It was assigned its BIP number on Dec. 3, 2025. The proposal’s own repository currently lists its status as “Draft.” Some recent coverage described it reaching “Complete” status in June.
Where the 2.56% Actually Comes From
Signaling has climbed slowly from a small base, Ocean Pool mined the first BIP-110 signaling block in March 2026 and remains, along with DATUM (Ocean’s block-template distribution tool).
| Period | Approx. signaling rate |
|---|---|
| Late June 2026 | ~0.3% |
| Late July 2026 | ~2.6% |
| Aug. 1–3, 2026 | ~2.5% |
| Aug. 4–8, 2026 | ~2.56% |
Opposition has been vocal and comes from more than one direction: Blockstream CEO Adam Back and Casa’s Jameson Lopp have both criticized the proposal’s design. Strategy’s Michael Saylor, whose ledger shows the company holding 842,138 BTC as of an Aug. 3, 2026.
What Block 963,648 Actually Decides
Two outcomes are mechanically possible from here, and neither depends on persuasion. If signaling stays near its current level, BIP-110 falls short of the 1,109-of-2,016 blocks needed to lock in this period, and the deployment fails to activate on schedule.
Nodes enforcing it in the meantime end up following whatever chain the minority of signaling miners can produce, which produces new blocks far more slowly than the chain most of the network uses. If instead a large pool reverses course before block 963,648, something none has signaled any intention of doing, lock-in becomes possible and the restrictions would take effect at block 965,664.
Timeline
- Dec. 3, 2025: BIP-110 assigned its number.
- March 2026: Ocean Pool mines the first signaling block.
- July 18–19, 2026: Saylor publishes an essay opposing the proposal on his own account.
- Aug. 1, 2026: a rumor of delayed activation circulates and is quickly retracted.
- Aug. 4, 2026: Guida confirms the rebased proof-of-work contingency code.
- Aug. 8–9, 2026: mandatory signaling window opens at block 961,632.
The BIP-110 timeline traces the proposal from its formal assignment in December 2025 through early miner signaling, public debate, and technical updates leading to the mandatory signaling window on Aug. 8–9, 2026.
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