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_3PqB3k1ninkrtdmflw

Subscription · Pro plan · monthly

refunded

Amount

€101.85

Method

Card · via Stripe

Created

2026-05-09 12:30:33

Customer

Jonas Almeida

cust_b69d1b1d

Emailjonas.almeida@acme.example

IBAN hashiban-209475a33750

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. 12:30:33
    operator:eve@vendor-euissued refund pi_3PqB3k1ninkrtdmflw · amount=10185 cents
    prevd219d149hash21e64cb6
  2. 12:30:33
    tenant-gateisolation check passed tenant=acme-co · row.tenant_id matches session
    prev571e566fhashd219d149
  3. 12:30:33
    stripe.webhookverified signature, ingested pi_3PqB3k1ninkrtdmflw · payment_intent.refunded
    prev09a849f8hash571e566f