The Book · Multi-Asset Core Ledger
The multi-asset book of record that always balances.
A cloud-native, double-entry core ledger engineered for banking rails and digital assets. Maintain strict client segregation, reconcile bank nostro accounts with on-chain reserves, and eliminate spreadsheet drift.
Append-only double entry · Event-sourced · Continuous reconciliation
In the machine
Everything either writes to the book — or protects it.
The Journal posts into The Book. The Watch gates what may be written.
What it does
Append-Only Double-Entry Architecture
Every financial movement posts as balanced debits and credits across fiat and stablecoins. No mutable balances, zero back-dated edits, and an immutable event-sourced audit trail.
Real-Time Nostro / Vostro Alignment
Ingest data directly via files, message queues, or APIs—continuously matched against on-chain wallet reserves to eliminate reconciliation lag.
End-of-Day Netting & Rebalancing
Provider accounts, bank nostro/vostro, and custodians pile up offsetting operations all day. At cut-off, The Book nets them out and rebalances treasury positions across every venue, so each day closes reconciled.
Limits & Policy Enforcement on Write
Evaluate multi-currency caps, per-client balance ceilings, and single-transaction thresholds before an entry can commit. Broken rules are rejected at write time.
Instant Financial & Regulatory Reporting
Generate audit-ready trial balances, balance sheets, and regulatory returns directly from the single source of truth without end-of-month spreadsheet reconciliation.
Designed for stablecoins, architected for everything: Tokenized deposits, RWAs, bonds, and structured products post to the exact same double-entry book.
Under the hood
Double-entry balance proof: whose money, and where it sits
Every financial event posts balanced debits and credits across assets and liabilities. The Book mathematically proves that segregated client obligations equal physical reserves in real time.
Who it’s for
Mid-market
Replace manual spreadsheets and ERP stitching with an automated multi-currency core ledger that connects your bank accounts and digital asset operations seamlessly.
Banks
Deploy a high-throughput, ISO 20022-compliant digital asset sub-ledger that interfaces with your existing mainframe or core banking system (Temenos, Mambu, Sopra) without replatforming.
