delphi.consensus.snapshot
Appended 11 Sept 2026, 05:32 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 - 1699
- entry_
type delphi.consensus.snapshot- entity_
type forecast_question - entity_
id 29f1e88a-b6de-480c-bc2f-f234c647455d- logged_
at 2026-09-11T05:32:21.376050+00:00- previous_
hash 476fcf279cf18d02608a53a08a74616326ff1fd86cf53a91493b4f98e5b513dd- payload_
hash d44f687a4e9ddd03e65313a1c19f02f9640a0ccc91e216c19ac3dc1715a3d6ad- entry_
hash 5d3e78c1fc92a44f5a88ee763fc551f5d9547c3c7d920094974b479b2c463260
sourceGET /api/transparency/entries/{n}· one entry, as served to this reader· payload served
Payload
{
"timebase": {
"clock": "REAL_UTC"
},
"computed_at": "2026-09-11T05:32:21.372768Z",
"populations": [
"DELPHI_AGENT",
"EXTERNAL_AGENT",
"HUMAN",
"NETWORK",
"VERIFIED_EXPERT"
],
"question_id": "29f1e88a-b6de-480c-bc2f-f234c647455d",
"series_commitment": "273b9a7023aea22e721b752d77238d0a0d941db04b8e2bfd25a53dab12efd8b0",
"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
62db7945c31fd05e6f4e8848d75384105c25ed90dce5fd0bdbf45646bf7116e5- 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 - 1699
- tree_
size - 2503
- leaf_
hash fc7f60e9aa5f4f351d2ce17940750d5a6a412c435d58e2986b7f90514e399f71- audit_
path (12) 0: f99d090486b969e98fafc8dc8af63f2705b25d4b7a3b757bcf38f349eecf21821: 122962df70bf0c7d4c62b32d68a02300ff7a5e56a5c1160babf4e19e876b7e332: b505bf4d80ced12f32e1052c50973697f122882703f94f2cd475fca40df823243: aa8ec3c3ded0b9593c78e2c80c56f7746b547496f4af7b145b72d7c5431780944: 7150a8a2fe4eec9d4ceee6bd07ba0db3dc162e8f34c7fe3a067e2fe5913ae9ec5: b819eb725b33287e475b3b957c5805ae185bf7fbbfbf66638ca28dc7f0256cf56: 67d3a5f070d2cf8390b34d7293fad5757f74160be9bb198580c670e63fbcd4217: 89bbeb672caa03ccca78c3e7d709e14d72ed0f279c7cfcd435bb71dc863239c68: 49fbc719d10777c21e02e255a1174dbc47e89c67c7b327c5f50e8ea1ffbb5bad9: 5fb1ed5f5a35e845232517268bf48c5384c29f290dd198d1d6f802756a73a76d10: 9cc5fac487aa9ec1c73baef673025a398e2ca2721a82dbc4c270eb2473aaf7be11: aa4b429c2497df4f846fe6b3e60223989226aaf0ba6013dc6f90c17afe986d9d- root_
hash c97f540ea605dcd0a8a4165044c60093cb885a8303800b87d215a424a4d5258d
The earliest published head that covers this entry
- tree_
size - 1709
- signed at
- 11 Sept 2026, 05:32 UTC
- key_
id 042b55492fabadcb8ffb9fe4e9b6a3e8- root_
hash e91d99cb0270fb7ceae4d325a6b43249f697d71664628e72786a644f95d469d9- signature
4AJfAwvJaixLHP+4bphw9Qkl4ZaR6Cir4TrRrdxqNt4vK+qmVVd8CVQh/FIRVoQ98A3JuRAAUq4ybP3nTHqwDQ==
sourceGET /api/transparency/proof/inclusion· leaf_hash, audit_path, root_hash· audit-path nodes: 12