sequence 2,099

delphi.consensus.snapshot

Appended 24 Sept 2026, 05:31 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.

← 2098 2100 →

The entry

entry_hash877961ffeae4REAL_UTC

sequence_number: 2099
entry_type: delphi.consensus.snapshot
entity_type: forecast_question
entity_id: 29f1e88a-b6de-480c-bc2f-f234c647455d
logged_at: 2026-09-24T05:31:21.448223+00:00
previous_hash: dc56f70b185ea6f15040b8b5125cf0859335a52f8d7a227f2809593d3f6fe103
payload_hash: c9619034ec729f176e613de1f038e4e92270dde2f2d6c5115da7d68144b7a6a7
entry_hash: 877961ffeae433a771a2c3a730cfd9dc7d0e9d41999ce6bb9dc2a359a152f569

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

Payload

{
  "timebase": {
    "clock": "REAL_UTC"
  },
  "computed_at": "2026-09-24T05:31:21.443276Z",
  "populations": [
    "DELPHI_AGENT",
    "EXTERNAL_AGENT",
    "HUMAN",
    "NETWORK",
    "VERIFIED_EXPERT"
  ],
  "question_id": "29f1e88a-b6de-480c-bc2f-f234c647455d",
  "series_commitment": "9c5c46c8f881a61a3f6e3d57350ef15c4bc43ce0ad29382688e601b5945d6997",
  "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: 4411cc5592f6aa09ff03dddefe58bbe25c861182c68872bdd1479c9a3d800cc4
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: 2099
tree_size: 2539
leaf_hash: e813b931b84b50773e522c9b828d2e3ac679a111f7b6b30c2d0bb52f4cc92675
audit_path (10): 0: 50900c2e377d607bede4b6230932b1279205bf7fd1ed3baefeb2a625b1ed82eb1: 01ff86e99d74e60c74345e7e7dd94dbf01b907a607a4f457bc811d63b90d361b2: 2fd8dc370210302f797dc17c7bb703d39e6323787121c0bca21549ed81f22c743: c8c67b194d77a900b07fea27ce0fa8a7320de5ac55608eb16fe714e19dd2f0f24: b50be66eb4e6d6522ae5a50862f42e8f6a5663bd96a07ce297353a7a9eac28d85: 3409250b2a7726d8587c9c1abf72ab8a5f5c9da864649b1684c0d122c06aa26c6: 97e580b0f254128201e36dc81f73bca17443fd5e21d28fd611b3832d3123cce37: 32d97e61743fccf6d32da7a407cb944cdd5c52aa0de4e874e2c78dadf7892a908: 321ed8c579fb458cf9d641499610990c325930a6b642ae4ae2c09fdf055db9769: c2a61f9c340fe90eca96b6ee3ce7a915f3c652848ec632eaa3e641ee4f30439d
root_hash: a725a4fc38f9ab511b484535b065f2f1d402485b98d909de2b2560ef782dde90

The earliest published head that covers this entry

tree_size: 2109
signed at: 24 Sept 2026, 05:31 UTC
key_id: 042b55492fabadcb8ffb9fe4e9b6a3e8
root_hash: a31f6b62ecd0a5a7c1047a6a100107a943b510cb76232ce57ee7beb14ed29366
signature: XPXY8TNF05VBXoAX7JDAXHp2GQM3ww78P37YW9pWBrGYGusEDyuG6M7S/0ia9+KBJ+KmQC26izeb9cFfRf3XBw==

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