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_3PqB0kujgdkt6f2ow2

Add-on · usage overage

succeeded

Amount

€43.69

Method

SEPA Direct Debit

Created

2026-05-07 19:06:13

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. 19:06:13
    tenant-gateisolation check passed tenant=vendor-eu · row.tenant_id matches session
    prev618b4186hash286e153d
  2. 19:06:13
    stripe.webhookverified signature, ingested pi_3PqB0kujgdkt6f2ow2 · sepa_debit.succeeded
    prevd228d0b1hash618b4186