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Data Fiduciary
Kestrova Health · Hyderabad cluster (fictional)
Overview

Synthetic tenant: Kestrova Health (fictional), 442 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.

Registry

Consent receipt

Inpatient admission · Ishaan G***

Kestrova Secunderabad · issued 26 Oct 2026, 1:04 pm IST · valid to 24 Apr 2027 · v1

Verified

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
  • Insurance and TPA sharing Granted
  • Updates to family contactRefused

Who, and how sure

Patient
Ishaan G*** · KSV-HYD-20393
Identity
L2 Mobile OTP + staff witness
Factors
mobile otp: checked by serverstaff witness: staff witnessed
Capture
ceremony · assisted · kiosk
Co-signer
Gayatri Rao (spouse)
Teach-back
partial · 0.75 · live model · answer hash f04970dca1bc

What was shown, and the seal

Notice
notice.ipd_admission v2026-09.1 · हिन्दी
Notice hash
9b8b399be413d139fb3b5fb4984ba6a82873621d217f7264b307e101704c325f
Receipt hash
3b5236c0631cd749c1021c29cc10c6bb72a167342d71136d92b78dc1bd5710b5
Signature
_ZWstFBaFaYuaJuQaScFN3p_hlgDOt-J-7sjW4KQ5jpFIZLQ9avT3oaYY-14RmYC8NXwfNjyc8d-NXMjHA0PDw
Algorithm and key
Ed25519 · ksv-47c7d4987f3a

Audit chain entries

  1. #492 receipt issued · 26 Oct, 1:04 pm05235e370302ca1d

Each entry hashes the previous one, so removing or editing an entry breaks every entry after it.

FHIR endpoint