Key Takeaways:
Bitcoin's ECX hard fork splits into three launches from Aug. 23 to Oct. 31, with the permanent mainnet release on the white paper's 18th anniversary.
"The Alpha and Beta launches will ideally resemble the full launch, in every way possible," Paul Sztorc, the developer behind the Drivechain proposal and BIP 300, said in an Aug. 7 update on X.
The alpha version activates Aug. 23 at block 963648. A beta follows Sept. 20 at block 967680, and the full release is set for Oct. 31 at block 973728. Coins collected during the alpha and beta phases can be burned and redeemed for real ECX once the permanent chain goes live. Sztorc cited "LLM bug chaos," early price discovery, and a safety net against potential disasters as reasons for the phased approach. The move comes as crypto developers have been scrambling to protect projects from bugs discovered faster by artificial intelligence models.
Replay protection, the mechanism that prevents a transaction from executing on both the Bitcoin and ECX chains simultaneously, remains opt-in rather than automatic. Official ECX wallet software will apply the protection and alert users before a transaction goes through. Sztorc was direct about the consequences of ignoring the warning: "If you ignore us, we will replay your txns," he wrote, meaning ECX will follow a user's outgoing Bitcoin to its new owner unless the split is done intentionally.
ECX is a new blockchain that copies Bitcoin's full transaction history at a set block height, crediting nearly every Bitcoin holder — minus some of Satoshi's coins — with an equal amount of ECX. Bitcoin's own network is not altered by the process.
The Oct. 31 mainnet date falls on Halloween, exactly 18 years after the publication of the Bitcoin white paper that first described the network's design in 2008. Sztorc gave holders and exchanges a specific runway: "You have 12 weeks to practice."
Each of the three block heights — 963648 in August, 967680 in September, and 973728 in October — marks a checkpoint for the network's mining difficulty and exchange support preparations. Bitcoin holders and exchanges face practical decisions: whether to run the official wallet software to separate BTC and ECX holdings, how exchanges plan to credit customers with the new asset, and how mining difficulty behaves once the alpha and beta phases generate real activity.
The announcement comes as Bitcoin faces a separate fork, BIP-110, estimated to occur around the same time. The phased rollout creates an extended period of uncertainty for Bitcoin holders and exchanges, with each launch phase providing a live test of the ECX chain's functionality before the permanent release.
This article is for informational purposes only and does not constitute investment advice.
