At block height 961,632, nodes running BIP-110, the controversial proposal to restrict arbitrary data storage on Bitcoin, began enforcing mandatory signaling rules. When the first block at that height arrived without the required version bit 4 signal, those nodes rejected it and split off from the main Bitcoin chain.
BIP-110, formally titled “Reduced Data Temporary Softfork,” was designed to limit the size of arbitrary data fields in Bitcoin transactions. Its primary target was data storage techniques powering projects like Ordinals and Runes. The proposal, authored by Dathon Ohm with input from longtime Bitcoin developer Luke Dashjr, called for a User-Activated Soft Fork (UASF) requiring 55% miner support to lock in. That threshold was never remotely close to being met.
Miner signaling for BIP-110 has fluctuated between 0.3% and 2.6% in recent periods. No major mining pool publicly expressed support for the proposal. Nodes running the enforcement rules, primarily those using Bitcoin Knots software, promptly rejected the non-signaling block and effectively isolated themselves from the rest of the network.
The data restrictions themselves were designed to activate at block height 965,664, roughly four weeks after the signaling window opened, assuming the 55% threshold was met during that window. If locked in, the restrictions would have applied for approximately one year, covering around 52,416 blocks.
