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_3PqByhpnfvk2mwgbm1

Subscription · Pro plan · monthly

declined

Amount

€92.68

Method

SEPA Direct Debit

Created

2026-05-08 20:56:11

Customer

Felix Schmidt

cust_e4381adf

Emailfelix.schmidt@acme.example

IBAN hashiban-845f68db96d2

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 · 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. 20:56:11
    tenant-gateisolation check passed tenant=acme-co · row.tenant_id matches session
    prevdb362ef5hashc74abd27
  2. 20:56:11
    stripe.webhookverified signature, ingested pi_3PqByhpnfvk2mwgbm1 · sepa_debit.failed
    prevcce33e5ehashdb362ef5