In a striking development within Bitcoin’s governance landscape, the first block signaling support for BIP‑110 was mined on March 1, 2026, igniting renewed debate over the protocol’s direction. This milestone marks a tangible shift from theoretical discussion to real-world action, as miners begin to signal readiness for a temporary soft fork aimed at limiting arbitrary data on-chain.
What Is BIP‑110 and Why It Matters
BIP‑110, originally known as BIP‑444, is a draft Bitcoin Improvement Proposal authored by Dathon Ohm and introduced in December 2025. It proposes a one-year temporary soft fork that enforces strict limits on arbitrary data embedded in transactions—specifically, capping new output scriptPubKeys at 34 bytes and OP_RETURN data at 83 bytes . The goal is to curb spam-like activity, such as Ordinals and other non-monetary data, which critics argue burdens node operators and threatens decentralization .
The proposal is designed to be temporary, with automatic expiry after approximately one year unless extended . Activation requires miner signaling via bit 4, with a 55% threshold within a difficulty adjustment period to lock in the soft fork .
Miner Signaling and the First BIP‑110 Block
On March 1, 2026, a miner known as Barefoot Mining successfully mined block #938903, signaling support for BIP‑110 using the DATUM system on the OCEAN platform. This event was independently confirmed via Reddit posts and block explorers like Mempool.Space . The block’s version number ending in “10” indicates explicit signaling for BIP‑110 .
This marks the first tangible evidence that at least one miner is actively supporting the proposal, moving the discussion from theory to action.
Current Support Landscape
As of late January 2026, approximately 2.38% of Bitcoin nodes—583 out of 24,481—were signaling support for BIP‑110, primarily via Bitcoin Knots implementations . However, support remains far below the 55% threshold needed for activation, and no major mining pools have publicly committed to backing the proposal .
Community Reactions and Controversy
The proposal has sparked intense debate. Blockstream CEO Adam Back has vocally opposed BIP‑110, calling it “an attack” on Bitcoin’s credibility and warning it could freeze user funds, despite safeguards in place . Other prominent figures—including F2Pool co-founder Wang Chun and Casa co-founder Jameson Lopp—have criticized the proposal for undermining protocol neutrality and risking chain splits .
Supporters argue that unchecked arbitrary data increases storage costs and centralization risks, while opponents believe market-driven fee mechanisms and policy-level filters are preferable .
What the First Block Actually Means
The mining of the first BIP‑110 signaling block is symbolically significant—it demonstrates that miners can and will signal support independently. Yet, it does not indicate a trend toward activation. Reddit commentary suggests that signaling remains rare among mining pools, with no other such blocks detected in the previous 41 days .
Moreover, the soft fork’s design ensures backward compatibility: non‑BIP‑110 nodes will accept blocks mined under the new rules, meaning no immediate chain split is expected . However, if signaling reaches the threshold and then drops, orphaned blocks could increase, potentially causing network instability .
What to Watch Next
- Miner Signaling Trends: Will more miners follow Barefoot Mining’s lead? Tracking bit‑4 signaling in upcoming blocks will be critical.
- Node Adoption: Will Bitcoin Knots users continue to grow, and will Bitcoin Core developers respond?
- Community Consensus: Will the debate shift toward policy-level solutions, or will BIP‑110 gain traction?
- Activation Risk: If signaling approaches 55%, how will exchanges, wallets, and economic nodes respond?
Disclaimer: This article is for informational purposes only and does not constitute financial or investment advice. Cryptocurrency investments carry significant risk, including the possibility of total loss. Past performance does not guarantee future results. Always conduct your own research and consult a qualified financial advisor before making investment decisions.