Demo · synthetic dataThis is what a substrate-built fintech product looks like running. UI is interactive — click any payment, customer, or mandate to drill in. Data is synthetic but consistent across all views.

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Payment

pi_3PqB66t9fw9lco2r79

Subscription · Starter · monthly

succeeded

Amount

€17.33

Method

SEPA Direct Debit

Created

2026-05-08 17:07:40

Customer

Petra Korhonen

cust_6ab587f5

Emailpetra.korhonen@acme.example

IBAN hashiban-2ad4eb50b6bc

KYCrejected

Tenantacme-co

Tenancy + posture

Tenantacme-co

Tenant-gate checkpassed

Stripe webhook signatureverified

Webhook replay window≤ 5 min · enforced

PCI-DSS scopeSAQ-A · no PAN

AI Act Art. 12 logimmutable append-only

Audit chain · 2 events for this payment

View full audit log →

Every event references the FNV-1a hash of the previous event in the global audit chain. Tampering with any event breaks the chain and is detected by the daily integrity job (next run 03:00 UTC).

  1. 17:07:40
    tenant-gateisolation check passed tenant=acme-co · row.tenant_id matches session
    prev67e7b931hashbf4228c5
  2. 17:07:40
    stripe.webhookverified signature, ingested pi_3PqB66t9fw9lco2r79 · sepa_debit.succeeded
    prev3dd1c5b3hash67e7b931