Bitcoin Improvement Proposal 110, designed to restrict the size of arbitrary data miners can embed in transactions, has stalled with only 0.86% miner support, far below the 55% needed for early activation. Despite this low backing, the softfork will enter mandatory signaling at block 961,632 around August 7 and be enforced fully on September 1 regardless of miner consent.

Background and Proposal Details

BIP 110, which reached "Complete" status on June 25, 2026, aims to reintroduce strict limits on data attached to Bitcoin transactions. It caps data pushes at 256 bytes and limits OP_RETURN fields to 83 bytes across seven consensus rules. These restrictions reverse a late 2025 decision by Bitcoin Core developers who had removed the historical 80-byte limit on OP_RETURN. The original removal sought to encourage data-heavy users to adopt prunable storage to avoid permanent ledger bloat.

Support among node operators remains low, estimated between 7% and 15%, mostly from users running Bitcoin Knots, a client favored by those opposing large data inscriptions like Ordinals and Runes. Developers such as Luke Dashjr and communities like Bitcoin University advocate these limits to reduce storage costs and network spam.

Miner Signaling and Pool Voting

Miner signaling, which involves marking mined blocks to indicate support, has been negligible so far. However, Foundry Mining Pool, controlling roughly 25% to 30% of the global hash rate, has initiated an internal vote that could influence its collective signaling decision before the mandatory phase begins. A significant shift in Foundry’s stance may impact the softfork’s adoption trajectory.

  • BIP 110 reached "Complete" status on June 25, 2026.
  • Miner support currently at 0.86%, below 55% threshold.
  • Mandatory signaling starts at block 961,632, expected August 7.
  • Full enforcement scheduled for September 1, regardless of miner signaling.
  • Node-level support between 7% and 15%, mainly from Bitcoin Knots users.
  • Foundry pool holds 25% to 30% hash rate and opened internal vote.

This article is for informational purposes only and does not constitute financial advice.