sequence 2,126

delphi.consensus.snapshot

Appended 25 Sept 2026, 05:30 UTC. Its place in the chain is fixed by the hash of the entry before it; what follows is whether that place is covered by a signature.

← 2125 2127 →

The entry

entry_hash2cc87ca48b01REAL_UTC

sequence_number: 2126
entry_type: delphi.consensus.snapshot
entity_type: forecast_question
entity_id: 3b91df80-00fc-4a4b-b86e-3310edcb9332
logged_at: 2026-09-25T05:30:42.645716+00:00
previous_hash: b8a2cb4c7091bb0623ac9e8432dc853fd3e7de94286e913a80f9e0faf7c8e7fc
payload_hash: 636839b783dec8683f6486f78c712afa965d53592322b931c0d4f6a5c7e28751
entry_hash: 2cc87ca48b017153fad69eda504f70b4ff87a4eb8e1b79db693ace24e3cf66b0

sourceGET /api/transparency/entries/{n}· one entry, as served to this reader· payload served

Payload

{
  "timebase": {
    "clock": "REAL_UTC"
  },
  "computed_at": "2026-09-25T05:30:42.641854Z",
  "populations": [
    "DELPHI_AGENT",
    "EXTERNAL_AGENT",
    "HUMAN",
    "NETWORK",
    "VERIFIED_EXPERT"
  ],
  "question_id": "3b91df80-00fc-4a4b-b86e-3310edcb9332",
  "series_commitment": "9f2476a14fd197d6ce98cfae0b977b9a88b396ff4a71cbb2e53b3d614ac31f2d",
  "commitment_version": "v2"
}

Shown indented so it can be read. The hash is taken over the canonical form of the same object — keys sorted by code point, no insignificant whitespace, UTF-8 rather than escaped ASCII, timestamps RFC 3339 in UTC to microseconds, decimals as their plain string form. The check below re-encodes the object canonically before hashing it, which is why an indented display cannot make it pass or fail.

Which digest recipe applies

migration 0021 salted this digest · both versions coexist in one append-only log

commitment_versionv2stated in the payload

The entry names its own version, so a reader can pick the right recipe without knowing when the salt was introduced.

sha256(canonical_json({question_id, computed_at, salt, readings})), where readings is the batch's populations sorted by population, each carrying exactly {population, method, method_version, sample_size, distinct_operator_count, value}

salt: fd0df2907b744304679f927d762cd80619b9a4b8577afdff366967b6df5fceca
readings: 5
recompute: sha256(canonical_json({question_id, computed_at, salt, readings})) must equal series_commitment in the payload above. Take question_id and computed_at from that payload verbatim, sort readings by population, and give each reading exactly the six keys served here — the values carry their stored precision and are hashed as the decimal strings they appear as

Verify it here

computed in your browser, not on the server

Recomputing the hashes in this browser… If this sentence stays, this browser has no Web Crypto and nothing here has been verified locally.

The proof, as served

leaf_index: 2126
tree_size: 2357
leaf_hash: 43833e245faf234fdea4997f934a9b8e9b68bc38c5bbee48c8799df57cc0ec58
audit_path (10): 0: 0e88b10acacc2a9e7cbeb954f406d4f90b636a830ff9213f4b26009f993de8f81: a5ba300b6bc116affffdef9a36d7c0d96a268f7d3bac2ea4e7052bad0931cc1c2: 32edc6d61ad755463350f5d7e7e10af43a0f9889d2ac3e5d5a2833b32ba8bd7b3: 9958dd2f7a6055b116651c7bfb66a013f79bf3ac76ed1c646924a897672e45374: d939d81632dfc335e3bf2cb2617a9ef02fad423763ee0ed0672db12825d2348c5: 559bc6d68b20ef3ce754297613d102bda419cb61cab1971c2f441622cd86f40c6: f4d02cca79f588f9c172b1dc53f54784db35848f8f8b4fa96ae1493d76b463787: 32d97e61743fccf6d32da7a407cb944cdd5c52aa0de4e874e2c78dadf7892a908: b2c4aa6040f878f3778bb1b9f9de1e703711b5846ca7e47c80f789c39ae1714b9: c2a61f9c340fe90eca96b6ee3ce7a915f3c652848ec632eaa3e641ee4f30439d
root_hash: 58c8c5ab99dba36e8c6b398578e37592253a716c9cf756f72e78b6606a198d59

The earliest published head that covers this entry

tree_size: 2135
signed at: 25 Sept 2026, 05:30 UTC
key_id: 042b55492fabadcb8ffb9fe4e9b6a3e8
root_hash: 45e4998f74d5c216e9d9da4088fefb456c0aa83e21edb4035f581e57b15431a0
signature: zdy+vfo0PbejA1KdjFDDhWpugBbEt8J/FMJk2Vz2wJbl7wwNofT7wjsVH+qSOXUuNAQhUmxVRVTnm/IWY5iEDA==

sourceGET /api/transparency/proof/inclusion· leaf_hash, audit_path, root_hash· audit-path nodes: 10