Martin Habovstiak (마르틴 하보시타크), a Slovak Bitcoin developer who maintains the Rust Bitcoin library, embedded a 66-kilobyte image file directly into the Bitcoin blockchain as a single continuous transaction.

The demonstration directly rebuts several key claims around BIP-110 (BIP-110) for anti-spam measures and the Bitcoin Knots node implementation, The Block reported on Feb. 28.

The transaction can be publicly verified on the blockchain. Decoding the raw hex value converts it into a TIFF file that can be viewed with standard image software. The image shows Bitcoin Knots developer Luke Dashjr (룩 대시르), a key supporter of BIP-110, crying. Habovstiak disclosed the project on X, formerly Twitter, and also provided detailed documentation with step-by-step instructions for independently verifying it with a Bitcoin full node, The Block said.

The transaction did not use any of OP_RETURN, Taproot or OP_IF, which BIP-110 targets as key restrictions. It used SegWit v0 instead of Taproot. Based on this, Habovstiak argued that BIP-110's restriction method can be bypassed.

BIP-110, first proposed in October 2025 as BIP-444, is a one-year temporary soft fork that limits OP_RETURN outputs to 83 bytes and bundles individual data pushes into 256-byte units. It emerged after Bitcoin Core v30 effectively removed the OP_RETURN data limit.