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_3PqBj5y346d4qovog6

Top-up · prepaid balance

refunded

Amount

€17.05

Method

SEPA Direct Debit

Created

2026-05-07 21:00:05

Customer

Rafael Rinaldi

cust_aa29d3f3

Emailrafael.rinaldi@vendor.example

IBAN hashiban-b8698903dd2d

KYCverified

Tenantvendor-eu

Tenancy + posture

Tenantvendor-eu

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. 21:00:05
    operator:eve@vendor-euissued refund pi_3PqBj5y346d4qovog6 · amount=1705 cents
    prev236e7e1fhashfafb430d
  2. 21:00:05
    tenant-gateisolation check passed tenant=vendor-eu · row.tenant_id matches session
    prev0f93e7b9hash236e7e1f
  3. 21:00:05
    stripe.webhookverified signature, ingested pi_3PqBj5y346d4qovog6 · sepa_debit.refunded
    prevb67ca1c1hash0f93e7b9