delphi.consensus.snapshot
Appended 3 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.
The entry
- sequence_
number - 1342
- entry_
type delphi.consensus.snapshot- entity_
type forecast_question - entity_
id a8c36f16-c0df-49f5-92d5-29bb1d0e58a9- logged_
at 2026-09-03T05:31:20.968630+00:00- previous_
hash 1ef87546ddd68a7e9044d05747d1f1b1101c628ac1f7bf69268eb398240acf77- payload_
hash a214253cac1ae8b81c392fcfd1e9a01ba043a1e71b94484e36ec41aeeef74781- entry_
hash 5305ab6547e09d0914c75a9be3baf955d8af0bed47945947dd28051a552db7e1
sourceGET /api/transparency/entries/{n}· one entry, as served to this reader· payload served
Payload
{
"timebase": {
"clock": "REAL_UTC"
},
"computed_at": "2026-09-03T05:31:20.966235Z",
"populations": [
"DELPHI_AGENT",
"EXTERNAL_AGENT",
"HUMAN",
"NETWORK",
"VERIFIED_EXPERT"
],
"question_id": "a8c36f16-c0df-49f5-92d5-29bb1d0e58a9",
"series_commitment": "d414ee253187c1ca0f3118a6fbc8220a52ad61f1bc22ec598eb33bb0f0e59474",
"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
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
15dc310e797a4ce38f3a7bdee1269a160691e4eb485044870131ec6cf4277394- 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
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 - 1342
- tree_
size - 2539
- leaf_
hash 827beee2afe9822be0576a68ea9388bdb89f101b0ff4ebe2e70b8055531b87e1- audit_
path (12) 0: 69cad99dc518b08977e70d34ee0b3862246fa99bce65998f747d9472b6b2d3211: 3d95971bd923a8bc9b3e81eac6a7f5502fa4b4f5ea6a22fe209f4b7c877a5ed52: 368b76e05e3f8451990710dbf96f9f0c741fa929cde25a895d7c79ef874713a13: b37f63b20e8eb322307cfa432b489c4f83165faf9a7864d61a79b8e8016c3eda4: 2918c2aeb1134879bae40b295e56941c654043e35aeceab2d852a6af12421b575: b36c7c4e17776a5c001456b78736a38b0060838a2c1cca456f37637a9e1267416: 1856e988c0ca2de1232e3499545b496b7d991e639165b9289a3c3dc3f273d8d47: 00aa16d00eabe2b61089fea4a6c3044cf3b1ced9f2af168276f93e239a98dae48: 73b80563a47162cfa99809097caf5d77512af3a28ebfbf76c6bcfd5f572cc1d29: e4979eb1a845b9e87ed1dae5e71668989143fa3d9cf0261e0f77022718d3602e10: 9cc5fac487aa9ec1c73baef673025a398e2ca2721a82dbc4c270eb2473aaf7be11: 7833c416a5e9084d256ef204718818c64927b373cdeabf763b837dcea4eed9bf- root_
hash a725a4fc38f9ab511b484535b065f2f1d402485b98d909de2b2560ef782dde90
The earliest published head that covers this entry
- tree_
size - 1349
- signed at
- 3 Sept 2026, 05:31 UTC
- key_
id 042b55492fabadcb8ffb9fe4e9b6a3e8- root_
hash 7f923b9e276353e56131136c5f2d8734810b3ae593a7802c5ab7323e72ba7b33- signature
cFBBIpZO7O16ciWU8zV0mJX+pH5fdC2cAi7r1uTf6xLxXWweGyK8nkOKKpKkMiQp66DEILlOvMRMH3A5aU6FAw==
sourceGET /api/transparency/proof/inclusion· leaf_hash, audit_path, root_hash· audit-path nodes: 12