Meet Chronicle – the final step in restoring BSV to the original Bitcoin Protocol.

The mandatory upgrade honours our vision of a pure, unrestricted protocol, breaks down unnecessary barriers & allowing developers to innovate without limits.

Breakdown & documentation below.

✅ All Chronicle behavior is OPT-IN.
This design ensures stability for wallets, businesses & users.

To opt in to the new rules, transactions must:
► Use the new CHRONICLE sighash flag [0x20], or
► Have a transaction version > 1 [0x01000000]

Existing apps continue to work without changes.

MANDATORY UPGRADE: All nodes must update to support Chronicle.

Nodes that don’t will no longer follow the main network. Stay current to ensure connectivity & compatibility.

With protocol freedom, Chronicle empowers developers to build the next generation of BSV apps.

Key dates:

Scheduled TestNet activation height: 1,713,168 (12:00 midday 14-Jan-2026)
Scheduled MainNet activation height is 943,816 (12:00 midday 07-Apr-2026)