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_3PqB8q8r8ha689pi31

Top-up · prepaid balance

succeeded

Amount

€31.64

Method

Card · via Stripe

Created

2026-05-07 12:13:28

Customer

Sofia Lopes

cust_3a317f82

Emailsofia.lopes@vendor.example

IBAN hashiban-7896a062ef6e

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 · 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. 12:13:28
    tenant-gateisolation check passed tenant=vendor-eu · row.tenant_id matches session
    prev51aa3210hash7449507d
  2. 12:13:28
    stripe.webhookverified signature, ingested pi_3PqB8q8r8ha689pi31 · payment_intent.succeeded
    preva4db95fchash51aa3210