Developer API

Public lookup is intentionally simple and read-only.

Lookup by SHA-256

GET https://proofstamp.hatchable.site/api/lookup?hash=<64-hex-sha256>

{
  "ok": true,
  "found": true,
  "proof": {
    "id": "…",
    "document_hash": "…",
    "txid": "…",
    "paid_sats": 12900,
    "created_at": "…"
  }
}

HTTP 404 means no public HashDocket registration was found. This API does not reveal or accept the source document.

Use cases

CI/CD release evidence, research-data checks, contract workflow audit trails, content provenance dashboards and public verification badges.