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_3PqB5582ji2lqsefo2

Subscription · Starter · monthly

refunded

Amount

€46.93

Method

SEPA Direct Debit

Created

2026-05-08 03:56:12

Customer

Lena Lindberg

cust_fcd7b96f

Emaillena.lindberg@acme.example

IBAN hashiban-e5de7e103532

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 · 3 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. 03:56:12
    operator:eve@vendor-euissued refund pi_3PqB5582ji2lqsefo2 · amount=4693 cents
    prev563bb456hashf3b23c57
  2. 03:56:12
    tenant-gateisolation check passed tenant=acme-co · row.tenant_id matches session
    prev40c02c81hash563bb456
  3. 03:56:12
    stripe.webhookverified signature, ingested pi_3PqB5582ji2lqsefo2 · sepa_debit.refunded
    prevf1a6102dhash40c02c81