Synthetic tenant: Kestrova Health (fictional), 443 receipts. Sixty days of activity are generated deterministically and anchored to the current hour, so expiry and breach clocks are live. Every receipt is signed at load with Ed25519 key ksv-47c7d4987f3a and re-verified by the same code the public verify API runs. Consents you sign in the patient journeys appear at the top of the registry, held only in your browser.
Consent receipt
OPD visit · Tarun Q***
Kestrova Secunderabad · issued 18 Oct 2026, 6:00 pm IST · valid to 18 Oct 2027 · v1
The hash recomputed from the stored content equals the stored hash, and the Ed25519 signature over that hash checks out against the published key.
Purposes on this receipt
- Treatment and careneeded for the service Granted
- Diagnostic lab sharingneeded for the service Granted
- Updates to family contact Granted
- Appointment and refill reminders Granted
- Health tips and seasonal alertsWithdrawn
- Partner offers (insurance, pharmacy)Refused
Health tips and seasonal alerts withdrawn 19 Oct, 12:22 am IST
event d123c751…3c5a- SMS and WhatsApp gateway· stop and eraseacknowledged 19 Oct, 12:25 am
- Patient-engagement CRM· stop and eraseacknowledged 20 Oct, 1:32 pm
- Removed from every campaign audience and suppression list updated
Who, and how sure
- Patient
- Tarun Q*** · KSV-HYD-20335
- Identity
- L1 Mobile OTP
- Factors
- mobile otp: checked by server
- Capture
- quick · self-serve · kiosk
- Copy arm
- value exchange
What was shown, and the seal
- Notice
- notice.opd_visit v2026-09.1 · हिन्दी
- Notice hash
- bf0deddfb254022e83f81b0282b6e7406e9ec7f032687a652e6115aa01dac795
- Receipt hash
- 4f7cc87cb4dec11a4e4b6f48950314bd6eca70c18db6ef5bdf5309dcb9e594b2
- Signature
- bCwSNx_U9s_KpnHdPq4rEuY8GSmiMETZTQFyN-yXyn7uD3zxmQNYqnik9a4j3jTiZWkRqRGySrrswASTLpmLDw
- Algorithm and key
- Ed25519 · ksv-47c7d4987f3a
Audit chain entries
- #401 receipt issued · 18 Oct, 6:00 pm628986d764d95054
- #405 withdrawal recorded · 19 Oct, 12:22 am780f51bdeadd826a
- #406 processor acknowledged · 19 Oct, 12:25 am43cb093fbe76bfe0
- #424 processor acknowledged · 20 Oct, 1:32 pmd69a5e7028d1d71c
Each entry hashes the previous one, so removing or editing an entry breaks every entry after it.