Bitcoin SV (BSV): Craig Wright's Fork

In May 2016, Australian computer scientist Craig Steven Wright publicly claimed to be Satoshi Nakamoto. He provided what he said was cryptographic proof to several journalists and Bitcoin developer Gavin Andresen. However, the proof was quickly debunked by the broader cryptographic community — Wright had not signed a message with a key known to belong to Satoshi, but instead used a signature that was already publicly available on the blockchain.

Despite the debunking, Wright doubled down. Over the following years, he filed hundreds of patents related to blockchain technology, pursued legal action against anyone who publicly denied his Satoshi claim, and gathered a small but vocal group of supporters. His most significant backer was Calvin Ayre, a billionaire online gambling entrepreneur who funded Wright's legal battles and the development of Bitcoin SV through his company CoinGeek.

The Bitcoin SV fork emerged from a dispute within the Bitcoin Cash community. In November 2018, Bitcoin Cash was scheduled for a protocol upgrade. Two competing implementations proposed incompatible changes: Bitcoin ABC (led by Amaury Séchet) wanted to add canonical transaction ordering and new opcodes, while Bitcoin SV (led by Craig Wright and nChain) wanted to increase the block size to 128 MB and restore original opcodes that Satoshi had disabled.

When the two sides couldn't agree, both activated their upgrades simultaneously on November 15, 2018, creating two separate chains. What followed was the "hash war" — both factions directed enormous mining power at their respective chains to prove dominance. Calvin Ayre and Craig Wright publicly threatened to bankrupt the ABC side by redirecting all available hash power. The hash war lasted approximately two weeks and cost both sides millions of dollars in mining expenses before BSV was widely recognized as the minority chain.

Bitcoin SV's technical roadmap centered on removing the block size limit entirely, allowing blocks of any size. The project eventually mined blocks larger than 4 GB — thousands of times larger than Bitcoin's effective block size. Proponents argued this would enable enterprise-scale applications on the blockchain, while critics pointed out that such massive blocks would make running a full node impractical for anyone except large data centers, destroying the decentralization that makes blockchain valuable.

Wright's legal campaign was equally aggressive. He filed lawsuits against Bitcoin developers, cryptocurrency influencers, and anyone who publicly called him a fraud. The Crypto Open Patent Alliance (COPA), backed by major companies including Block (formerly Square), brought a case against Wright in the UK. In March 2024, Justice James Mellor ruled definitively that Craig Wright is not Satoshi Nakamoto, calling his evidence fabricated and his testimony dishonest. Wright was later found in contempt of court for continuing to assert his claims despite the ruling.

The turning point for Bitcoin SV came in April 2019, when Wright sent legal threats to a pseudonymous cryptocurrency personality known as "Hodlonaut" for calling him a fraud. The community rallied around Hodlonaut, and Binance CEO Changpeng Zhao announced that BSV would be delisted from Binance, the world's largest cryptocurrency exchange. Kraken, ShapeShift, and other exchanges followed within days.

The delistings devastated BSV's liquidity and credibility. Without access to major exchanges, trading volume collapsed. The project's market capitalization, once in the billions, declined to a fraction of its peak. Developer interest evaporated as the broader industry treated BSV as a cautionary example rather than a legitimate project.

As of 2026, Bitcoin SV is widely regarded as irrelevant. It serves primarily as a case study in what happens when a cryptocurrency project is built around a personality cult rather than genuine technical merit or community consensus. The COPA v Wright ruling effectively ended any remaining credibility for Wright's Satoshi claims, and BSV's vision of enterprise-scale blockchain has failed to attract meaningful adoption.