sequence 2,178

delphi.consensus.snapshot

Appended 27 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.

← 2177 2179 →

The entry

entry_hash051b8319ebd1REAL_UTC

sequence_number: 2178
entry_type: delphi.consensus.snapshot
entity_type: forecast_question
entity_id: 3b91df80-00fc-4a4b-b86e-3310edcb9332
logged_at: 2026-09-27T05:30:21.937453+00:00
previous_hash: aaaa6ae8eda29686ab6c5e993b52dc98324ca7d8f8195f0bd9f05d4ff7ed01ac
payload_hash: b267c05c06d9e17531aa5a7bd1d4458f385c76b3c06b5794a1743cad4c4b1311
entry_hash: 051b8319ebd1c9ed0e4e1d0527824365aeb373e9ddceaec5dec3fc7549709800

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

Payload

{
  "timebase": {
    "clock": "REAL_UTC"
  },
  "computed_at": "2026-09-27T05:30:21.933344Z",
  "populations": [
    "DELPHI_AGENT",
    "EXTERNAL_AGENT",
    "HUMAN",
    "NETWORK",
    "VERIFIED_EXPERT"
  ],
  "question_id": "3b91df80-00fc-4a4b-b86e-3310edcb9332",
  "series_commitment": "ad2480c5198e1202e26b14b6356b2fec97ae1527e5553ecdc437b373e5a11820",
  "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: c867d890035a5da14a2f11094f9d1f5b9ffb39627dc0ae9c65daa257c3213422
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: 2178
tree_size: 2389
leaf_hash: 06d58d157ad826ea0d256a8a19d79f4a04a34e1217a428243096f48d84a33466
audit_path (10): 0: 5b49d05f70704b1acf657645fbc814332d9675a7a2cf402d119275acb5afc9f21: 55cac9a75cf508668c636970d4916d7bb9f8744bd10336706a9a364871c97cae2: dfaab98a4becfd042fb3b37de69ee41784c4630d9d68442d4ea3bb21a87ae8e93: ed3a76cf89ab882e3f8ce250f3dbb03f8c6da0f1d8761cbe57148314b5bd20a24: ca7191c480f6b18f2aa9dda035866fed87fbdd940ba16b9f842e3e09f1e1efd05: 0349dea9398b8aa40633af547e822a1da687592d53272f4e6aa136e48023a75b6: f30320e32b01d85ee25d3699765f61034c40add7177cc53ee3e39fdfed97b4367: 126596474757e47b31a2f4c9d89412108fada5bcdc7a19a9a1de3d4012be0b578: 03c349147789bfb063beb6c472906eef54792e9077566daa1ada925b4ce9b91b9: c2a61f9c340fe90eca96b6ee3ce7a915f3c652848ec632eaa3e641ee4f30439d
root_hash: 4f7f1a3085d540e3b69ac022c801823029c04ad350f74966858670c2038ea3cd

The earliest published head that covers this entry

tree_size: 2187
signed at: 27 Sept 2026, 05:30 UTC
key_id: 042b55492fabadcb8ffb9fe4e9b6a3e8
root_hash: b1b50955e5089069aa81067ad2479df134298ae6bf7dee437daf781fa54ff0b6
signature: t0dWB84xoVBksXiO35mfeoTvij91UZx6rGZhLHqb2/zFwm5RcmHkzpdfzuu5kxVcT2cgqmmgQGI1XHIHmyc5BA==

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