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Do not trust us. Check.

A passport is worth exactly as much as the ability to verify it without our permission. This page loads the published issuer key, recomputes the canonical form of the record and checks the signature in your browser. No request reaches LENTRA. If the company disappeared tomorrow, every passport it ever issued would still verify.

Input

{
  "passport_version": "0.1",
  "id": "lp_01J8Q4M2X7V0K3ZC9T5BR6NDWF",
  "issuer": {
    "name": "LENTRA",
    "key_id": "lentra-demo-2026-08"
  },
  "claims": {
    "source": {
      "requested_url": "https://api.example-exchange.com/v2/instruments/BTC-USD/book?depth=25",
      "final_url": "https://api.example-exchange.com/v2/instruments/BTC-USD/book?depth=25",
      "redirects": 0,
      "host_resolved_ip": "203.0.113.44",
      "tls_certificate_sha256": "sha256:9f2c…c41a"
    },
    "observation": {
      "observed_at": "2026-08-18T21:41:06.318Z",
      "observed_at_source": "roughtime+ntp-consensus",
      "freshness": "live",
      "cache": {
        "served_from_cache": false,
        "upstream_age_s": 0,
        "max_age_s": 5
      },
      "duration_ms": 412
    },
    "method": {
      "transport": "https_get",
      "agent": "lentra-collector/1.4",
      "javascript_executed": false,
      "interaction": "none",
      "execution_provider": "provider-b",
      "provider_is_substitutable": true
    },
    "context": {
      "egress_region": "eu-central",
      "egress_asn": "AS64500",
      "egress_class": "datacenter",
      "market_context": {
        "venue": "example-exchange",
        "instrument": "BTC-USD",
        "quote_currency": "USD",
        "locale": "en-US"
      }
    },
    "quality": {
      "http_status": 200,
      "content_sha256": "sha256:41d0…8be2",
      "content_bytes": 8317,
      "corroboration": {
        "independent_observations": 2,
        "agreement": "full",
        "max_divergence_bps": 0.4
      },
      "anomalies": []
    },
    "rights": {
      "basis": "publisher_terms",
      "terms_url": "https://api.example-exchange.com/terms",
      "terms_sha256": "sha256:7a19…0f55",
      "permitted_use": [
        "internal_decision",
        "audit_evidence"
      ],
      "prohibited_use": [
        "model_training",
        "redistribution"
      ],
      "retention_max_days": 730,
      "jurisdiction": "EU"
    }
  },
  "chain": {
    "seq": 48213,
    "prev": "sha256:c7e1…9a30"
  },
  "signature": {
    "alg": "ed25519",
    "key_id": "lentra-demo-2026-08",
    "value": "wb5G9FD8Y8fxFjRXTKUeftW5a79ito84uZVFRvQW9yFj6VT5lCDrtpAJRbS46STLjxfNvbkPUWNQ+R9CElF8CA=="
  }
}

Verdict

Awaiting input.

Paste a record, or verify the specimen.

The check runs locally. Reload this page offline and it still works.

What is actually checked

Signature

Ed25519 over the canonical record, against the issuer key published at /keys/issuers.json.

Integrity

Any edit to any field breaks the signature. There is no partial pass.

Freshness

Live or cached, upstream age, and how old the observation is at the moment of reading.

Rights

What the record permits and what it forbids, travelling with the fact itself.