BIP 110 Proposes Temporary Bitcoin Soft Fork to Restrict Non-Payment Data Use

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BIP 110 is a proposed temporary Bitcoin soft fork that would impose strict limits on output script sizes, witness data, and certain Taproot features for roughly one year to reduce non-payment data in block space. The proposal emerged following Bitcoin Core 30.0's October 2025 release, which raised the default data-carrier size limit to 100,000 bytes, prompting debate over whether miners and nodes should police block space usage. Unlike node policy changes, BIP 110 would encode these restrictions at the consensus layer, requiring 1,109 of 2,016 blocks to signal support for early lock-in — a notably lower threshold than historical precedents like the 2017 SegWit activation. Critics, including Adam Back, argue that a soft fork enforced by only a small minority of economic nodes risks a chain split rather than a clean upgrade, and that Bitcoin's permissionless, decentralized nature should not be compromised to deter inscriptions. As of July 30, 2026, only 14 blocks were publicly signaling support, and experts note BIP 110 is unlikely to eliminate arbitrary data but may raise the engineering cost of embedding it.

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