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.

← Back to /build

Payment

pi_3PqBvdrq6knbvr3baa

Subscription · Pro plan · monthly

succeeded

Amount

€80.19

Method

SEPA Direct Debit

Created

2026-05-08 19:30:03

Customer

Amelia Nieminen

cust_3c49bb6f

Emailamelia.nieminen@acme.example

IBAN hashiban-615ecf663346

KYCverified

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. 19:30:03
    tenant-gateisolation check passed tenant=acme-co · row.tenant_id matches session
    prev969bd040hashaca76d81
  2. 19:30:03
    stripe.webhookverified signature, ingested pi_3PqBvdrq6knbvr3baa · sepa_debit.succeeded
    prev4c1d0754hash969bd040