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_3PqBypl5jthx35fskl

One-off purchase

refunded

Amount

€34.82

Method

SEPA Direct Debit

Created

2026-05-08 22:07:56

Customer

Tomás Korhonen

cust_b098484e

Emailtomás.korhonen@acme.example

IBAN hashiban-b07d3b3ebd97

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. 22:07:56
    operator:eve@vendor-euissued refund pi_3PqBypl5jthx35fskl · amount=3482 cents
    prev175ba3d1hash988248ed
  2. 22:07:56
    tenant-gateisolation check passed tenant=acme-co · row.tenant_id matches session
    prev80454703hash175ba3d1
  3. 22:07:56
    stripe.webhookverified signature, ingested pi_3PqBypl5jthx35fskl · sepa_debit.refunded
    prev146b9d65hash80454703