{
  "log_key": "sphinx.ct.digicert.com/2026h2",
  "description": "DigiCert 'Sphinx2026h2'",
  "operator": "DigiCert",
  "checkpoint_url": "https://sphinx.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": 241
    },
    "checkpoint_parses_in_its_declared_format": {
      "outcome": "ok",
      "format": "ct_v1_sth"
    },
    "checkpoint_carries_tree_size_and_root_hash": {
      "outcome": "ok",
      "tree_size": 1468299031,
      "root_hash": "0d2d9d15fcacc503d7f5d605b27a12069fbb46d6609a18552542b57219f32a15"
    },
    "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": "2026-08-02T05:34:33.624945+00:00",
      "prior_tree_size": 1468250716
    },
    "second_read_answered": {
      "outcome": "ok",
      "tree_size": 1468304618
    },
    "tree_did_not_shrink_between_reads": {
      "outcome": "ok",
      "first_size": 1468299031,
      "second_size": 1468304618,
      "entries_added": 5587
    },
    "consistency_proof_served": {
      "outcome": "ok",
      "nodes": 24
    },
    "consistency_proof_recomputes_to_the_second_root": {
      "outcome": "ok",
      "reason": "both_roots_recomputed",
      "first_size": 1468299031,
      "second_size": 1468304618,
      "proof_nodes": 24
    }
  },
  "evidence": {
    "first_read": {
      "url": "https://sphinx.ct.digicert.com/2026h2/ct/v1/get-sth",
      "status": 200,
      "error": null,
      "bytes": 241,
      "read_at": "2026-08-02T05:42:43.868158+00:00",
      "body_sha256": "9a2f08c4c4064b762eb2f3049a5adc28e7cfa41f514c2077e97292bcc060b914",
      "parsed": true,
      "format": "ct_v1_sth",
      "tree_size": 1468299031,
      "timestamp": 1785649363494,
      "signature_lines": 1,
      "root_hash_hex": "0d2d9d15fcacc503d7f5d605b27a12069fbb46d6609a18552542b57219f32a15",
      "raw_body": null
    },
    "signature_check": {
      "supported": true,
      "verified": true,
      "scheme": "ecdsa_p256_ct_v1"
    },
    "prior_batch": {
      "log_key": "sphinx.ct.digicert.com/2026h2",
      "read": "second_read",
      "read_at": "2026-08-02T05:34:33.624945+00:00",
      "tree_size": 1468250716,
      "root_hash": "362886c29099dece4eb11e172262b202c989f51c82b36b8f7abfdfec85292752",
      "body_sha256": "6d55b5b4cf810c7990fde311745aed282ce11f4b302c6b87d6ecc666f8fe0d7a"
    },
    "second_read": {
      "url": "https://sphinx.ct.digicert.com/2026h2/ct/v1/get-sth",
      "status": 200,
      "error": null,
      "bytes": 241,
      "read_at": "2026-08-02T05:43:41.311611+00:00",
      "body_sha256": "77769e4e30fb4cf3676bc8c4d4e3918bf30bcd968d00c2950877508cd1be47a4",
      "parsed": true,
      "format": "ct_v1_sth",
      "tree_size": 1468304618,
      "timestamp": 1785649421021,
      "signature_lines": 1,
      "root_hash_hex": "4b4f9ac07b3a29ad8dbabeb441f3222c3fcf734e3b1aec420791f0bdfefeab03"
    },
    "consistency_request": {
      "served": true,
      "url": "https://sphinx.ct.digicert.com/2026h2/ct/v1/get-sth-consistency?first=1468299031&second=1468304618",
      "proof": [
        "481e90d9856b49dbb78f143c09be362c82a0d644c01642d64dd8cd75fa72e85a",
        "a442cc774eaef4c36ccbf11948f4d569dde8ab0b12a1cd8915b435a621548c4e",
        "dc8cea54611d009c93d8eeecbee279ac19955c50d458859877138f4fa6adfeee",
        "0b76f4479dd59e681d7b388741d572a49e63a9df503f4db04a4330aebe91ef53",
        "4ac5e7083d700fa1cafed7708ca0c25532c1a63b42b421d4be427e6e89e5af1c",
        "bf1352ed115db68ccd6a05c01d4e1ad027c1460bc8d908b2f569faac5a28c721",
        "01844df62ed24ecf86dbd8f7ae4b6d62e1610b4bb507f2bd58b0612d0a387373",
        "72f914cf8659d51bf60d89a3aa10f08a58c4a6a797aed089598b7419fec5fba1",
        "74977faf2737c0a032ebcf28a43c80ea3dd50698d0bba7df2e91a4012bb6a626",
        "a75d3647ccba98a1d08a8f2195a9a7697bf96581e500287681c5eef0b2135ab4",
        "fcd370555446f53ce402dba8e225f374be4ef19871063cf501ab5866897d7178",
        "7525b238973b651db5e1d086e8fbd8f8124707d108331992c2666706a0841d9c",
        "98d0fb04391115f2f493c5e87c0fa9d09c49974a292fd04a6b13f17f242a820d",
        "30797de0099bac6cb8102519e7f697b19007b98d2e0d0cdec5f96a63a9b2a2fe",
        "4d322fcee8d16e58fc9bbbd260e51fa3ba161b116214bccec507ee28430a389b",
        "17b0b41a311bdc5f5538e64c1226cae004d73bd7f91bac0cf878773017cc7380",
        "73c52cd319adf991ddc72196ba94eeef1ff8f1a9e72ff485aca164dd7aca1eb1",
        "9f1c0e39e005d995342ac2874a63d4b42e92d13cfbe8d2262de35c54cfc12a57",
        "d0b7966ff624f3e612bfd98ddf739f2cb57e1ca85079871c99a508d4fbcd7207",
        "d3bc3ee3ecb8cb5a7b0cea58b0f5f69c821f9367a701e0cfd6e71ea468dd4403",
        "88a7f84faa49a0768f1f85a408b8dda2cdb57e253360d16f9325bbfd7a9c350b",
        "19fefd810d9cb3bbadb98f9c332dbc1f818229cad866b2d17488878f944b62ab",
        "b24969c85fc8b75e1187668ba1cf1c95c0731c78419f73079b0eb8442a5daefc",
        "3e9fbba19b37e730905498d5592894bb1b64cfa173be7e4021a3430b85268897"
      ],
      "nodes": 24
    }
  },
  "tree_advanced_between_reads": true,
  "entries_added_between_reads": 5587,
  "checked_at": "2026-08-02T05:43:57.758968+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_2026h2.json",
  "ledger": "https://geniusflow-federation.vercel.app/tlog/ledger.json",
  "ledger_digest": "1e9ae859e742abe6cfb6dabb7e5d337cba88d3f3cc0715ceb8a5a9bdc3821603",
  "expectations_digest": "78cb2f5444df2da26462e17070ab9e421ae85b30a8ec1ed672ea21cddeb34290"
}