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_3PqBcfbjoro7um1tbe

Add-on · usage overage

refunded

Amount

€41.95

Method

SEPA Direct Debit

Created

2026-05-08 00:12:51

Customer

Bruno Kovač

cust_07820fe0

Emailbruno.kovač@acme.example

IBAN hashiban-e9dfe4fe2710

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. 00:12:51
    operator:eve@vendor-euissued refund pi_3PqBcfbjoro7um1tbe · amount=4195 cents
    prev7d590116hashd3f75ff5
  2. 00:12:51
    tenant-gateisolation check passed tenant=acme-co · row.tenant_id matches session
    prev833eae6fhash7d590116
  3. 00:12:51
    stripe.webhookverified signature, ingested pi_3PqBcfbjoro7um1tbe · sepa_debit.refunded
    prevf00318b5hash833eae6f