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 - 1328
- entry_
type delphi.consensus.snapshot- entity_
type forecast_question - entity_
id 1b1a20a9-2af9-4c58-972e-a6628e241b09- logged_
at 2026-09-03T05:31:20.870431+00:00- previous_
hash cec979946e30898dcb988072439f83e28a92601df1e5e77834bfe310a687443f- payload_
hash 7a2544c5421faacbf889fdaf0fcf65fbb6f25f23fe71498b00c025cdaf691a4f- entry_
hash 1effae310c995f90554d1243406b1fc0adf4c0460920b993f052dce7cf33d13e
sourceGET /api/transparency/entries/{n}· one entry, as served to this reader· payload served
Payload
{
"timebase": {
"clock": "REAL_UTC"
},
"computed_at": "2026-09-03T05:31:20.867221Z",
"populations": [
"DELPHI_AGENT",
"EXTERNAL_AGENT",
"HUMAN",
"NETWORK",
"VERIFIED_EXPERT"
],
"question_id": "1b1a20a9-2af9-4c58-972e-a6628e241b09",
"series_commitment": "a3075fdf81d1972b9e33336f0490e926fa76a1e80b61efa1e04abec73f415216",
"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
37a49ce115fc4d766aea8368d28d2dcb9b91dd6c39d122dc82315b8460025cf8- 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 - 1328
- tree_
size - 2341
- leaf_
hash ee901dfb032d7ddb302f2beea51bd56a36a9a6d6d8733da0a2f2d20a9b80843d- audit_
path (12) 0: baf97a21caeafbd9cf71a48b58df71537a396ade5c017193b9887ea692721b1d1: f7d33210ac8964c0f170cc3e1a35ace42d8621d9b7357a4ce606360f245627982: d9787f0580b8370881d90a07725338cc2797f44943d7c8b54f6a983f284f22ea3: dfbe1af2d4d370a02df80cf16ad32518b6b20d84466dc8b341d3fac9f970d08d4: 2918c2aeb1134879bae40b295e56941c654043e35aeceab2d852a6af12421b575: b36c7c4e17776a5c001456b78736a38b0060838a2c1cca456f37637a9e1267416: 1856e988c0ca2de1232e3499545b496b7d991e639165b9289a3c3dc3f273d8d47: 00aa16d00eabe2b61089fea4a6c3044cf3b1ced9f2af168276f93e239a98dae48: 73b80563a47162cfa99809097caf5d77512af3a28ebfbf76c6bcfd5f572cc1d29: e4979eb1a845b9e87ed1dae5e71668989143fa3d9cf0261e0f77022718d3602e10: 9cc5fac487aa9ec1c73baef673025a398e2ca2721a82dbc4c270eb2473aaf7be11: bd18df2de60e205be411a53ea96887ec76f5a16c15250bf48e3f90dc788abbaf- root_
hash 9f32e37b52a81f4fc0f11a1b956464ef6acde09c58b0ce26dc44277199cb7df0
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