Harbour Study IV
Your name, 2026. Photograph.
- Certificate
- TH-2026-SPEC-001
- Level
- L3, Device Verified
- Evidence
- RAW original and device-signed capture, reviewed by a person
- Signature
- ECDSA P-256 over the certificate number, file hash, level, owner and date
- Watermark
- Invisible, survives re-compression and re-sharing
- Registry
- Public and permanent, revocations included
- Seal
- Drawn from this work’s hash and number. How the seal works

