{
  "log_key": "wyvern.ct.digicert.com/2027h1",
  "description": "DigiCert 'Wyvern2027h1'",
  "operator": "DigiCert",
  "checkpoint_url": "https://wyvern.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": 243
    },
    "checkpoint_parses_in_its_declared_format": {
      "outcome": "ok",
      "format": "ct_v1_sth"
    },
    "checkpoint_carries_tree_size_and_root_hash": {
      "outcome": "ok",
      "tree_size": 48180696,
      "root_hash": "d9f71ae439ea69d6e901302c6c3c494ee72bfc84075af49a98138dc3b8b9a89b"
    },
    "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": "2026-08-02T05:34:36.584803+00:00",
      "prior_tree_size": 48179416
    },
    "second_read_answered": {
      "outcome": "ok",
      "tree_size": 48180852
    },
    "tree_did_not_shrink_between_reads": {
      "outcome": "ok",
      "first_size": 48180696,
      "second_size": 48180852,
      "entries_added": 156
    },
    "consistency_proof_served": {
      "outcome": "ok",
      "nodes": 19
    },
    "consistency_proof_recomputes_to_the_second_root": {
      "outcome": "ok",
      "reason": "both_roots_recomputed",
      "first_size": 48180696,
      "second_size": 48180852,
      "proof_nodes": 19
    }
  },
  "evidence": {
    "first_read": {
      "url": "https://wyvern.ct.digicert.com/2027h1/ct/v1/get-sth",
      "status": 200,
      "error": null,
      "bytes": 243,
      "read_at": "2026-08-02T05:42:45.780469+00:00",
      "body_sha256": "321218e1ba8e005974252e49aa153d4f0e80f9678c828c226141eefce9378198",
      "parsed": true,
      "format": "ct_v1_sth",
      "tree_size": 48180696,
      "timestamp": 1785649365381,
      "signature_lines": 1,
      "root_hash_hex": "d9f71ae439ea69d6e901302c6c3c494ee72bfc84075af49a98138dc3b8b9a89b",
      "raw_body": null
    },
    "signature_check": {
      "supported": true,
      "verified": true,
      "scheme": "ecdsa_p256_ct_v1"
    },
    "prior_batch": {
      "log_key": "wyvern.ct.digicert.com/2027h1",
      "read": "second_read",
      "read_at": "2026-08-02T05:34:36.584803+00:00",
      "tree_size": 48179416,
      "root_hash": "377bd4fc3582368a8a22c9974437615109982f3e19d230b5cffcf723363bdaec",
      "body_sha256": "a3b60d3e470823f2a58a2e808837ec0e6d4cd3507928925c4b515ca866f70f77"
    },
    "second_read": {
      "url": "https://wyvern.ct.digicert.com/2027h1/ct/v1/get-sth",
      "status": 200,
      "error": null,
      "bytes": 239,
      "read_at": "2026-08-02T05:43:44.193687+00:00",
      "body_sha256": "31be4c40ee4e31f8ed3c54036637afeb279c99d766a5cb84c74e0c19336d6a7b",
      "parsed": true,
      "format": "ct_v1_sth",
      "tree_size": 48180852,
      "timestamp": 1785649423157,
      "signature_lines": 1,
      "root_hash_hex": "05559d492a082709104ab2c0b5f7b2a8374e65c404d1713704c5454df00978b4"
    },
    "consistency_request": {
      "served": true,
      "url": "https://wyvern.ct.digicert.com/2027h1/ct/v1/get-sth-consistency?first=48180696&second=48180852",
      "proof": [
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        "8847cd2cb13a84f22fe5bd053351b95896bbe0c959518a764703a298c6f8c425",
        "c703cd1c8fc8f2c8bbb76724aee2e90d7a229ef365668fa8a2cd52502cf14f80",
        "e5e8c3d5bb508d9f67aa32f3fcade971009d86d093b9386c7fba7db338592d6e",
        "88998a4f89ea0f7a7810747b82bada7fe03a51cc807105ccf0ac14ee92151be1",
        "38b390de7fd77953646199bab4a3276ae9f26403b85d3361334b5c2bd7f8556c",
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        "ea2c1f0ac34d7a165d1fd1f9a52f3734fc616831a48cd14efefd33d40e5f2aaa",
        "378b75bf4b1d63105a81ef970688b5f306cac7c80f34812f71db893e15bd4e42",
        "3121c12d8f15a89a2ca18699e7d2e3f54f8951f35ba4b5c7e0ac291f0ee28a02",
        "9d55adebc8f60d65c551d24bd53fae9c532fcf4c3a741ef08691c21a4f7c06ff"
      ],
      "nodes": 19
    }
  },
  "tree_advanced_between_reads": true,
  "entries_added_between_reads": 156,
  "checked_at": "2026-08-02T05:43:57.758998+00:00",
  "must_admit": true,
  "full_admit": true,
  "refuse_limb": null,
  "refuse_reason": null,
  "attribution": null,
  "must_limbs_failed": [],
  "should_limbs_failed": [],
  "receipt_filename": "wyvern.ct.digicert.com_2027h1.json",
  "ledger": "https://geniusflow-federation.vercel.app/tlog/ledger.json",
  "ledger_digest": "1e9ae859e742abe6cfb6dabb7e5d337cba88d3f3cc0715ceb8a5a9bdc3821603",
  "expectations_digest": "78cb2f5444df2da26462e17070ab9e421ae85b30a8ec1ed672ea21cddeb34290"
}