Product
A public ledger anyone can verify
Every entry OpenBooks records is hashed with SHA-256 over a canonical encoding that folds in the previous entry’s hash. A nightly checkpoint publishes the head hash so anyone can independently recompute and verify the record over time. This is a cryptographic hash chain — no token, no consensus.
SHA-256 chained entries under one published head hash.
Append-only
The database blocks updates and deletes on the events table via an immutability trigger.
Independently checkable
Anyone with the tenant slug can recompute the chain and compare against the published head.
Nightly anchoring
The head hash is anchored to a stable URL, and when configured, to OpenTimestamps.
This page is being expanded. The core capability is live — deeper documentation is on the way.