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_3PqBe2285bzf7i5frp

Top-up · prepaid balance

declined

Amount

€18.82

Method

Card · via Stripe

Created

2026-05-08 13:32:17

Customer

Eva Almeida

cust_e699154c

Emaileva.almeida@vendor.example

IBAN hashiban-7a234dcbb70f

KYCpending

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. 13:32:17
    tenant-gateisolation check passed tenant=vendor-eu · row.tenant_id matches session
    prev40eb16e5hash1121aa5c
  2. 13:32:17
    stripe.webhookverified signature, ingested pi_3PqBe2285bzf7i5frp · payment_intent.failed
    prevffd9b04dhash40eb16e5