sequence 2,231

delphi.consensus.snapshot

Appended 29 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.

← 2230 2232 →

The entry

entry_hashf194ba7f0ca6REAL_UTC

sequence_number: 2231
entry_type: delphi.consensus.snapshot
entity_type: forecast_question
entity_id: 4bfc7aa0-f12f-479c-ba06-d8e4cebfe625
logged_at: 2026-09-29T05:31:20.831090+00:00
previous_hash: b7b6298731f27f410ce8abb402396808fd59e6f3c4e1ebdfee40cb3a0492b440
payload_hash: b454b0662d24cf766bae4a9d4520e40d5854ddda7563a23270855712a9409906
entry_hash: f194ba7f0ca6a0416947c65a1a89091fe509ce5935ee242fc7c88ec66939285e

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

Payload

{
  "timebase": {
    "clock": "REAL_UTC"
  },
  "computed_at": "2026-09-29T05:31:20.827261Z",
  "populations": [
    "DELPHI_AGENT",
    "EXTERNAL_AGENT",
    "HUMAN",
    "NETWORK",
    "VERIFIED_EXPERT"
  ],
  "question_id": "4bfc7aa0-f12f-479c-ba06-d8e4cebfe625",
  "series_commitment": "2a819bdee04e598d87a470f0067bb91967889d07c0ba7171291e29de2d1fb113",
  "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: a5fce35590037277ac716a66562d28b3aa154ef247274684611481ccf5cfd1aa
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: 2231
tree_size: 2503
leaf_hash: b9bb53b0ac6977c3404388d8eb6f93b02e1524332574eb9d79097836e4e85779
audit_path (10): 0: e5025c8516080e40f4afcb6186acb3c82be0ea1e04d34526578b911f4b8751821: e10f4c2f5ec334ec8d5742fe2e9509c908cd6e505891efb638d325cadbfa30c22: fdd5bd9205a2a4540976078b110f171fe552b84c4a6c8742c90db46426c88d9d3: 8ecfa0211918b2e9d96b6da731a3372dc96703f1648e49caae3b3b8476b6eac34: d2c68d760af74d87740ca89ff1ff67d32bd189e548ad56ef83ea1334e37149175: ff576d5d5ebff608e9a429939d33e803b4f824aa935c65d508ae2b3f2eec66696: f30320e32b01d85ee25d3699765f61034c40add7177cc53ee3e39fdfed97b4367: 126596474757e47b31a2f4c9d89412108fada5bcdc7a19a9a1de3d4012be0b578: 47a3489f8ed18aca1e6e6b6ae98a5d47ac64bb31c7314e873c7cbac9cda2eebe9: c2a61f9c340fe90eca96b6ee3ce7a915f3c652848ec632eaa3e641ee4f30439d
root_hash: c97f540ea605dcd0a8a4165044c60093cb885a8303800b87d215a424a4d5258d

The earliest published head that covers this entry

tree_size: 2239
signed at: 29 Sept 2026, 05:31 UTC
key_id: 042b55492fabadcb8ffb9fe4e9b6a3e8
root_hash: 03dd6fb33b4bd65222257eec0069956926795f14f7354795bcb42af5fe51ba08
signature: u8ChL0jIyB0SQwYB26vHeURVL3Ia2DcWQObp46M30jJWJb4SKWQ36EVhUNp29FUDMGkSZ7aAlkHhiTbNS6OGAA==

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