On 15 November 2018 the Bitcoin Cash chain split. The last common block was 556,766. Around 18:02 UTC the ABC and SV rules diverged. Bitcoin ABC (Amaury Séchet’s camp) activated canonical transaction ordering and extra opcodes. Bitcoin SV — nChain, Craig Wright, Calvin Ayre’s CoinGeek hash — rejected that set, restored older script behaviour, and raised the block-size cap toward 128 MB. Both sides had talked about a “hash war”: enough proof-of-work to orphan the other tape. In the event, both chains kept producing blocks. Exchanges spent the following days deciding which ticker meant which coins.
Bitcoin (BTC) did not fork that afternoon. The August 2017 Bitcoin Cash split from Bitcoin is a different week. Personality coverage is not the product. This page is the split.
What happened
A community that had already left Bitcoin over block size discovered it could split again. Holders of BCH at the fork generally received a claim on both tapes if they controlled keys — and a mess if they did not. Replay risk, exchange halt buttons, and miner signalling are the mechanics. “Which is the real Bitcoin Cash” is marketing.
Why it matters
A ticker collision is how people send the wrong asset. See how crypto wallets actually work, especially networks and recovery. If a venue lists BCH and BSV as if they were flavours of the same thing, they are not. Bitcoin’s chain is a third, older product.
What happens next
Hash moving, lawsuit noise, and two thin books. We will not pick a winner. Nothing here is an instruction to hold, dump, or split coins, and it is not a comment on anyone’s identity claims.
