Bitcoin’s eCash Fork Begins Alpha Testing Ahead of October 31 Mainnet Launch
Bitcoin’s contested eCash fork began producing its first Alpha-chain test blocks on August 23, 2026, starting a staged three-phase rollout that ends with a permanent mainnet split targeted for October 31, if developers can resolve the safety questions still hanging over the project before then.
The fork, proposed by researcher Paul Sztorc, would create a new asset called ECX, credited 1:1 to existing Bitcoin holders on the new chain while leaving their actual BTC completely untouched. The rollout is staged deliberately: an Alpha test chain went live at block height 963,648 on August 23, a Beta phase follows around block 967,680 on September 20, and the permanent Mainnet split is targeted for block 973,728 on October 31. Wednesday’s Alpha blocks were explicitly a rehearsal, not the real allocation event.
The unresolved risk sits in the technical details still being finalized. The new chain would reuse Bitcoin’s existing address formats, and replay protection, the mechanism that stops a transaction on one chain from being unintentionally repeated on the other, is opt-in rather than mandatory by default. Exchanges and custodians have flagged that combination as a real transfer risk: without protection turned on, a transaction meant for one chain could be replayed on the other, potentially moving funds somewhere the sender never intended.
Critics of the project go further than raising technical concerns, arguing eCash functions less like a genuine Bitcoin upgrade proposal and more like a complex, risky airdrop that repurposes Satoshi-linked coins and forces custody and security decisions onto holders and exchanges who never asked for them.
Bitcoin holders aren’t required to do anything to keep their BTC safe, that asset is unaffected regardless of how the fork plays out. But anyone planning to claim or trade the new ECX asset is walking into a chain where the final software, replay rules, and exchange handling are still being written in real time, with less than ten weeks left before the permanent split is scheduled to happen.
Curious how blockchain hard forks and replay protection actually work? Explore more in our Bitcoin Academy.