# hard fork

> backward-incompatible change in consensus rules of a blockchain; unless unanimously supported, results in two permanent alternative chains

**Wikidata**: [Q54864610](https://www.wikidata.org/wiki/Q54864610)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Hard_fork)  
**Source**: https://4ort.xyz/entity/hard-fork