{
  "log_key": "sphinx.ct.digicert.com/2027h1",
  "description": "DigiCert 'sphinx2027h1'",
  "operator": "DigiCert",
  "checkpoint_url": "https://sphinx.ct.digicert.com/2027h1/ct/v1/get-sth",
  "checkpoint_format": "ct_v1_sth",
  "signature_scheme": "ecdsa_p256_ct_v1",
  "key_source_url": "https://www.gstatic.com/ct/log_list/v3/log_list.json",
  "limbs": {
    "log_listed_in_a_public_list": {
      "outcome": "ok",
      "listed_in": "Google Chrome CT log list v3"
    },
    "public_key_obtained_independently_of_the_log": {
      "outcome": "ok",
      "key_source": "https://www.gstatic.com/ct/log_list/v3/log_list.json"
    },
    "checkpoint_endpoint_answers_without_credentials": {
      "outcome": "ok",
      "status": 200,
      "bytes": 239
    },
    "checkpoint_parses_in_its_declared_format": {
      "outcome": "ok",
      "format": "ct_v1_sth"
    },
    "checkpoint_carries_tree_size_and_root_hash": {
      "outcome": "ok",
      "tree_size": 38181371,
      "root_hash": "b5f50515ea654fc4e39f92ca5169ed94899d74f97ef92facdfcc1eab416bf929"
    },
    "checkpoint_carries_a_signature": {
      "outcome": "ok",
      "signature_lines": 1
    },
    "signature_scheme_supported_by_this_monitor": {
      "outcome": "ok",
      "scheme": "ecdsa_p256_ct_v1"
    },
    "signature_verifies_against_the_published_key": {
      "outcome": "ok",
      "scheme": "ecdsa_p256_ct_v1"
    },
    "checkpoint_carries_witness_cosignatures": {
      "outcome": "fail",
      "reason": "checkpoint_carried_no_signature_beyond_the_log_own",
      "attribution": "publisher",
      "note": "A Certificate Transparency signed tree head has no place to carry a witness cosignature, so this is a fact about the format as much as about the log."
    },
    "prior_batch_checkpoint_on_record": {
      "outcome": "ok",
      "prior_read_at": "2026-08-02T05:34:34.560061+00:00",
      "prior_tree_size": 38181154
    },
    "second_read_answered": {
      "outcome": "ok",
      "tree_size": 38181393
    },
    "tree_did_not_shrink_between_reads": {
      "outcome": "ok",
      "first_size": 38181371,
      "second_size": 38181393,
      "entries_added": 22
    },
    "consistency_proof_served": {
      "outcome": "ok",
      "nodes": 18
    },
    "consistency_proof_recomputes_to_the_second_root": {
      "outcome": "ok",
      "reason": "both_roots_recomputed",
      "first_size": 38181371,
      "second_size": 38181393,
      "proof_nodes": 18
    }
  },
  "evidence": {
    "first_read": {
      "url": "https://sphinx.ct.digicert.com/2027h1/ct/v1/get-sth",
      "status": 200,
      "error": null,
      "bytes": 239,
      "read_at": "2026-08-02T05:42:44.379543+00:00",
      "body_sha256": "8266300da4bec393ef90611037cc7eee0a62880c34a351aeb12a4523841be632",
      "parsed": true,
      "format": "ct_v1_sth",
      "tree_size": 38181371,
      "timestamp": 1785649363257,
      "signature_lines": 1,
      "root_hash_hex": "b5f50515ea654fc4e39f92ca5169ed94899d74f97ef92facdfcc1eab416bf929",
      "raw_body": null
    },
    "signature_check": {
      "supported": true,
      "verified": true,
      "scheme": "ecdsa_p256_ct_v1"
    },
    "prior_batch": {
      "log_key": "sphinx.ct.digicert.com/2027h1",
      "read": "second_read",
      "read_at": "2026-08-02T05:34:34.560061+00:00",
      "tree_size": 38181154,
      "root_hash": "806fed9fa0d5d1b30c6ead4f6054d0d3727f196cc6accf6b8d63134d3bfacb62",
      "body_sha256": "da549fa09b14777fc39d0ceb4c5fd7a07157e35106991d279e7f8b6439671c7b"
    },
    "second_read": {
      "url": "https://sphinx.ct.digicert.com/2027h1/ct/v1/get-sth",
      "status": 200,
      "error": null,
      "bytes": 239,
      "read_at": "2026-08-02T05:43:42.205043+00:00",
      "body_sha256": "c986f81a7f4f4e62d7d06ea59d97f71aca6473ddbef1e7209642d3630cf50567",
      "parsed": true,
      "format": "ct_v1_sth",
      "tree_size": 38181393,
      "timestamp": 1785649421274,
      "signature_lines": 1,
      "root_hash_hex": "72e8c22ce333fb7ae3e4b48fd1cce43f888690ec7eff17550c11cbc49d3c7246"
    },
    "consistency_request": {
      "served": true,
      "url": "https://sphinx.ct.digicert.com/2027h1/ct/v1/get-sth-consistency?first=38181371&second=38181393",
      "proof": [
        "2346431a29b2fa1f9861145a28bce0bbf06e0e0ac9f2be00d0699af5d43abb7e",
        "95e65c45941bafe979f91df4d7fe181fdf557aaf925411ce4c6a735ad5a7686e",
        "99f84cf1f03fd9750c7653c7cf08b06876f1e90fb855435ca52826bec7d2679d",
        "d6cd2736f97d7102ea380b27162f92e5fc590b7ce547da5a1557749d27c3840c",
        "e89e80b614b3f2779238a0b3e02f27ca2ed88150ec84d6fe6dee9ed7c7e28248",
        "189951dcb53d4c8da967fd7961427833ebd38695216f3ad36f91d2013d473e19",
        "1376ac90044110212af1d06786d8e2c9d20517e8c48301d7011ffeac6a30e7ca",
        "f855c43f801e4a65165b1759ee9ef90b249122467e05f016d1489d2a57a1280d",
        "abea2b9faa115e013693c544df4f5fcdf023b8a8510838a82776f0ef371e012a",
        "6100a38336bcb48238a77a9ffd290befc6644c33ca2c7fbef28e4478f363524b",
        "87689c326e1301bd95d2ee9c9c7d16d6a2c806fc76e47db958b00198ce821c00",
        "35f516d8588b340b0ef4340676e30df1c8945d9f20d488acf2ee70b3911d4924",
        "20fdd2ab6f327988b1142e4ecadb3174a0f8379dd2022afda82ac55bd54ef251",
        "f83a1f2d34859043ebbaf5b0ca5ae43e33468e644d2654f993a98e6d1238176d",
        "47e34fe53ad13f305c55ede8c73649ff04c099e76bdbeba95f75e0b44b31cf1c",
        "d6966dddbc1928b97e6d2a251d8cf8aafecb4ebaa6210acb06a0a4879dc145cd",
        "91ba1893c565550b5634c255fe478040a01ea8d067a8db2e3c61ca2dd441e1ea",
        "2fdf0806c666a73313acaccc8c566573aed67d661636fbd05550f07bf7725d52"
      ],
      "nodes": 18
    }
  },
  "tree_advanced_between_reads": true,
  "entries_added_between_reads": 22,
  "checked_at": "2026-08-02T05:43:57.758980+00:00",
  "must_admit": true,
  "full_admit": true,
  "refuse_limb": null,
  "refuse_reason": null,
  "attribution": null,
  "must_limbs_failed": [],
  "should_limbs_failed": [],
  "receipt_filename": "sphinx.ct.digicert.com_2027h1.json",
  "ledger": "https://geniusflow-federation.vercel.app/tlog/ledger.json",
  "ledger_digest": "1e9ae859e742abe6cfb6dabb7e5d337cba88d3f3cc0715ceb8a5a9bdc3821603",
  "expectations_digest": "78cb2f5444df2da26462e17070ab9e421ae85b30a8ec1ed672ea21cddeb34290"
}