{
  "log_key": "tiger2027h1.ct.sectigo.com",
  "description": "Sectigo 'Tiger2027h1'",
  "operator": "Sectigo",
  "checkpoint_url": "https://tiger2027h1.ct.sectigo.com/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": 240
    },
    "checkpoint_parses_in_its_declared_format": {
      "outcome": "ok",
      "format": "ct_v1_sth"
    },
    "checkpoint_carries_tree_size_and_root_hash": {
      "outcome": "ok",
      "tree_size": 129512654,
      "root_hash": "973a0c188bacfaa48a30912ed2f3e5cb182d074f3d500c12d42d907b28bd83ec"
    },
    "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": "2026-08-02T05:34:45.725567+00:00",
      "prior_tree_size": 129505432
    },
    "second_read_answered": {
      "outcome": "ok",
      "tree_size": 129512654
    },
    "tree_did_not_shrink_between_reads": {
      "outcome": "ok",
      "first_size": 129512654,
      "second_size": 129512654,
      "entries_added": 0
    },
    "consistency_proof_served": {
      "outcome": "not_applicable",
      "reason": "tree_did_not_advance_between_the_two_reads",
      "note": "There is nothing to prove between a size and itself. The two reads returned the same root, which is what a consistent log looks like over a quiet window."
    },
    "consistency_proof_recomputes_to_the_second_root": {
      "outcome": "not_applicable",
      "reason": "no_proof_needed_between_equal_sizes"
    }
  },
  "evidence": {
    "first_read": {
      "url": "https://tiger2027h1.ct.sectigo.com/ct/v1/get-sth",
      "status": 200,
      "error": null,
      "bytes": 240,
      "read_at": "2026-08-02T05:42:51.963435+00:00",
      "body_sha256": "6af008379c15e1208a20d8c5deb09792604cc2f94dc0bc2e968f6e23c23e5dbb",
      "parsed": true,
      "format": "ct_v1_sth",
      "tree_size": 129512654,
      "timestamp": 1785649312171,
      "signature_lines": 1,
      "root_hash_hex": "973a0c188bacfaa48a30912ed2f3e5cb182d074f3d500c12d42d907b28bd83ec",
      "raw_body": null
    },
    "signature_check": {
      "supported": true,
      "verified": true,
      "scheme": "ecdsa_p256_ct_v1"
    },
    "prior_batch": {
      "log_key": "tiger2027h1.ct.sectigo.com",
      "read": "second_read",
      "read_at": "2026-08-02T05:34:45.725567+00:00",
      "tree_size": 129505432,
      "root_hash": "6895ff352d3cda58a6be4fc930560aac81f1e21fb8d68d88499b0f7a68dab3d0",
      "body_sha256": "119fc1bb1d38e0ff06b7ff52a301310da510ed8b76c7e5cde6a5886a506aaaf3"
    },
    "second_read": {
      "url": "https://tiger2027h1.ct.sectigo.com/ct/v1/get-sth",
      "status": 200,
      "error": null,
      "bytes": 240,
      "read_at": "2026-08-02T05:43:53.169239+00:00",
      "body_sha256": "6af008379c15e1208a20d8c5deb09792604cc2f94dc0bc2e968f6e23c23e5dbb",
      "parsed": true,
      "format": "ct_v1_sth",
      "tree_size": 129512654,
      "timestamp": 1785649312171,
      "signature_lines": 1,
      "root_hash_hex": "973a0c188bacfaa48a30912ed2f3e5cb182d074f3d500c12d42d907b28bd83ec"
    }
  },
  "tree_advanced_between_reads": false,
  "entries_added_between_reads": 0,
  "checked_at": "2026-08-02T05:43:57.759059+00:00",
  "must_admit": true,
  "full_admit": true,
  "refuse_limb": null,
  "refuse_reason": null,
  "attribution": null,
  "must_limbs_failed": [],
  "should_limbs_failed": [],
  "receipt_filename": "tiger2027h1.ct.sectigo.com.json",
  "ledger": "https://geniusflow-federation.vercel.app/tlog/ledger.json",
  "ledger_digest": "1e9ae859e742abe6cfb6dabb7e5d337cba88d3f3cc0715ceb8a5a9bdc3821603",
  "expectations_digest": "78cb2f5444df2da26462e17070ab9e421ae85b30a8ec1ed672ea21cddeb34290"
}