{
  "log_key": "ct.googleapis.com/logs/us1/argon2026h2",
  "description": "Google 'Argon2026h2' log",
  "operator": "Google",
  "checkpoint_url": "https://ct.googleapis.com/logs/us1/argon2026h2/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": 2281773943,
      "root_hash": "e231480aa6f6e8b91bc68e17f4bd4509c319b3a4604f2b0f2f094ffc0717c3ab"
    },
    "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": "2026-08-02T05:34:42.209273+00:00",
      "prior_tree_size": 2281702148
    },
    "second_read_answered": {
      "outcome": "ok",
      "tree_size": 2281782781
    },
    "tree_did_not_shrink_between_reads": {
      "outcome": "ok",
      "first_size": 2281773943,
      "second_size": 2281782781,
      "entries_added": 8838
    },
    "consistency_proof_served": {
      "outcome": "ok",
      "nodes": 18
    },
    "consistency_proof_recomputes_to_the_second_root": {
      "outcome": "ok",
      "reason": "both_roots_recomputed",
      "first_size": 2281773943,
      "second_size": 2281782781,
      "proof_nodes": 18
    }
  },
  "evidence": {
    "first_read": {
      "url": "https://ct.googleapis.com/logs/us1/argon2026h2/ct/v1/get-sth",
      "status": 200,
      "error": null,
      "bytes": 241,
      "read_at": "2026-08-02T05:42:48.866666+00:00",
      "body_sha256": "0d0a1a5203dc42e6cd2d80c0f9514ece2cf2e1597f861b03f21bf7952534392f",
      "parsed": true,
      "format": "ct_v1_sth",
      "tree_size": 2281773943,
      "timestamp": 1785649308521,
      "signature_lines": 1,
      "root_hash_hex": "e231480aa6f6e8b91bc68e17f4bd4509c319b3a4604f2b0f2f094ffc0717c3ab",
      "raw_body": null
    },
    "signature_check": {
      "supported": true,
      "verified": true,
      "scheme": "ecdsa_p256_ct_v1"
    },
    "prior_batch": {
      "log_key": "ct.googleapis.com/logs/us1/argon2026h2",
      "read": "second_read",
      "read_at": "2026-08-02T05:34:42.209273+00:00",
      "tree_size": 2281702148,
      "root_hash": "0777c30fa191f56a55eb446f7a59060183c2a08df29ffb5bc026643f9a2d37b5",
      "body_sha256": "932a3d3981a963507758bca8f5753c125c0843d725b06fa2ee93edb788911b53"
    },
    "second_read": {
      "url": "https://ct.googleapis.com/logs/us1/argon2026h2/ct/v1/get-sth",
      "status": 200,
      "error": null,
      "bytes": 245,
      "read_at": "2026-08-02T05:43:49.743261+00:00",
      "body_sha256": "de7acd8c01bb8fd38efc839cacd7924e9a97512b253adc07aadaa399947ceb7c",
      "parsed": true,
      "format": "ct_v1_sth",
      "tree_size": 2281782781,
      "timestamp": 1785649369310,
      "signature_lines": 1,
      "root_hash_hex": "4ebb32e9aab2d8de5af95f386bc97a48ebd6e4ae34d9cbceb426ed9c576fa167"
    },
    "consistency_request": {
      "served": true,
      "url": "https://ct.googleapis.com/logs/us1/argon2026h2/ct/v1/get-sth-consistency?first=2281773943&second=2281782781",
      "proof": [
        "5d4a0151e9d85f22afbfc5e332b2fa9ed294d1759be9044a0b8849c52aad0cd4",
        "becbab75e3a6f76bde15b1048f6af6077a90c26398495a4676cd0eeaab6364e0",
        "c0a0b7fbc35fb4cec41541e9abee8d2694ac4d015176a09227fc1b26dcd1efe1",
        "f5a4fbe609af2fdb595e405d75ed0dc4a9e913530f297ccf080b4e8e0e87bc6d",
        "55b39d8e049977ca7f2b4c7a00d1df633e43f5dcec08395db57aefb94faafa80",
        "5e9216c8a88d1266691c8d8fa025cc3ae199bf035b53dc1a3a4a05debc90c2a1",
        "f2a4f82384aec447422e6c79d1c565870f1857dbcc89d8568d1eb94e0815c668",
        "079be685136c8a061b4fe4fa65527718fc5a435588ee030c2f3d2254efd46603",
        "3968e4373c4de844fe65e09c88298b902e4dbdebbf175c90eba06ca79aadb010",
        "0dcd7904987fa58bd84edab6dbf3eb3e8832851b91451a2e8dde6699b8879945",
        "31735c1b042ee1646e6768c0b57d7b4f09fcd19b367e35d7b4d8cfd9bc99debf",
        "05e029dd94ac9e8e5a5389a71760d3512751eb7b28c01653aed6a63507887d38",
        "96a566429ca99241c5ca7b8e5a4b65503208b16a79699369dea1193d67d9360d",
        "9f8fb182ed668b93132f927dfb8cf32e32f9046208477c2d65b79530b53682c2",
        "c51e3a2adee8984ac14e3ffbc3c4e3253db29218829e8fd6d13ad4c0ec08e176",
        "1f3daa8bfe13229c6d62a1ea24149cdedd1ad0f5e188d38968133e72d880c0d6",
        "952126d04b689bcc1310340f8481b79431f27e3f97f2180b1e6f2a255abf1b09",
        "71445eeeb91dd398e3ed093609ba6961c27cd36ed86b3ae90c5c60f7d4f153a4"
      ],
      "nodes": 18
    }
  },
  "tree_advanced_between_reads": true,
  "entries_added_between_reads": 8838,
  "checked_at": "2026-08-02T05:43:57.759019+00:00",
  "must_admit": true,
  "full_admit": true,
  "refuse_limb": null,
  "refuse_reason": null,
  "attribution": null,
  "must_limbs_failed": [],
  "should_limbs_failed": [],
  "receipt_filename": "ct.googleapis.com_logs_us1_argon2026h2.json",
  "ledger": "https://geniusflow-federation.vercel.app/tlog/ledger.json",
  "ledger_digest": "1e9ae859e742abe6cfb6dabb7e5d337cba88d3f3cc0715ceb8a5a9bdc3821603",
  "expectations_digest": "78cb2f5444df2da26462e17070ab9e421ae85b30a8ec1ed672ea21cddeb34290"
}