{
  "log_key": "wyvern.ct.digicert.com/2026h2",
  "description": "DigiCert 'Wyvern2026h2'",
  "operator": "DigiCert",
  "checkpoint_url": "https://wyvern.ct.digicert.com/2026h2/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": 245
    },
    "checkpoint_parses_in_its_declared_format": {
      "outcome": "ok",
      "format": "ct_v1_sth"
    },
    "checkpoint_carries_tree_size_and_root_hash": {
      "outcome": "ok",
      "tree_size": 1515546766,
      "root_hash": "a5466eed31cafe9abd29d604cb9b1ddf5b83cb409c6f1eaf0f9f03380fb4e3cd"
    },
    "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": "2026-08-02T05:34:35.825721+00:00",
      "prior_tree_size": 1515497879
    },
    "second_read_answered": {
      "outcome": "ok",
      "tree_size": 1515552310
    },
    "tree_did_not_shrink_between_reads": {
      "outcome": "ok",
      "first_size": 1515546766,
      "second_size": 1515552310,
      "entries_added": 5544
    },
    "consistency_proof_served": {
      "outcome": "ok",
      "nodes": 23
    },
    "consistency_proof_recomputes_to_the_second_root": {
      "outcome": "ok",
      "reason": "both_roots_recomputed",
      "first_size": 1515546766,
      "second_size": 1515552310,
      "proof_nodes": 23
    }
  },
  "evidence": {
    "first_read": {
      "url": "https://wyvern.ct.digicert.com/2026h2/ct/v1/get-sth",
      "status": 200,
      "error": null,
      "bytes": 245,
      "read_at": "2026-08-02T05:42:45.334993+00:00",
      "body_sha256": "91b65401ec1fc6006e0471dc7372e2276539268c849f6a373a1d51f62f985262",
      "parsed": true,
      "format": "ct_v1_sth",
      "tree_size": 1515546766,
      "timestamp": 1785649365052,
      "signature_lines": 1,
      "root_hash_hex": "a5466eed31cafe9abd29d604cb9b1ddf5b83cb409c6f1eaf0f9f03380fb4e3cd",
      "raw_body": null
    },
    "signature_check": {
      "supported": true,
      "verified": true,
      "scheme": "ecdsa_p256_ct_v1"
    },
    "prior_batch": {
      "log_key": "wyvern.ct.digicert.com/2026h2",
      "read": "second_read",
      "read_at": "2026-08-02T05:34:35.825721+00:00",
      "tree_size": 1515497879,
      "root_hash": "f1eabc12dfb5b6fe96ba2436fed7fc2fb9c7b6fa1ecc6840749daa18ec6b0f82",
      "body_sha256": "e2c2a4f8de9636cf2b9b82079d35122047fb62e24779e21b0f8ed533a54ffad2"
    },
    "second_read": {
      "url": "https://wyvern.ct.digicert.com/2026h2/ct/v1/get-sth",
      "status": 200,
      "error": null,
      "bytes": 241,
      "read_at": "2026-08-02T05:43:43.455276+00:00",
      "body_sha256": "9317f49f079763e3842ce9b4ffbb7a837834bb88aa4a3c8dc932ff57e5d5c497",
      "parsed": true,
      "format": "ct_v1_sth",
      "tree_size": 1515552310,
      "timestamp": 1785649423098,
      "signature_lines": 1,
      "root_hash_hex": "eb461299dd5b0f4784617d87469d0ac4d95ea9fcdad2ba20a8a6aa574f75090d"
    },
    "consistency_request": {
      "served": true,
      "url": "https://wyvern.ct.digicert.com/2026h2/ct/v1/get-sth-consistency?first=1515546766&second=1515552310",
      "proof": [
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        "e8d7b1046de7e159d5cde42f740f0c17ada77b6f2974f56a4f97187ee7b9d42c",
        "f9fc3dea1942627166e8967c31b528b444ebf14bfdb3238e047ffd0d97c2a9a7",
        "0de4e132b3c59b0005c0d4708311ea5520016d14eb2fbb82cb6fdd68ea7bf784",
        "4c96714d292d58d986d50c2a0804d2d532d63eac6bd912ea441361d169fb65b4",
        "54b6293546d4463e72a04dc984a14273de7982a3c1f91d0e91a0553d59c225f4"
      ],
      "nodes": 23
    }
  },
  "tree_advanced_between_reads": true,
  "entries_added_between_reads": 5544,
  "checked_at": "2026-08-02T05:43:57.758992+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_2026h2.json",
  "ledger": "https://geniusflow-federation.vercel.app/tlog/ledger.json",
  "ledger_digest": "1e9ae859e742abe6cfb6dabb7e5d337cba88d3f3cc0715ceb8a5a9bdc3821603",
  "expectations_digest": "78cb2f5444df2da26462e17070ab9e421ae85b30a8ec1ed672ea21cddeb34290"
}