delphi.consensus.snapshot
Appended 21 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 - 2021
- entry_
type delphi.consensus.snapshot- entity_
type forecast_question - entity_
id 29f1e88a-b6de-480c-bc2f-f234c647455d- logged_
at 2026-09-21T05:32:21.262624+00:00- previous_
hash 7d9188a7b027c2f020844e39a963f32be8da949e02a50bf1c605939e3d6ce43d- payload_
hash 97a434336707ea2aa1b6c641f31b989e0e336d112842bedc19140fe24e28cac3- entry_
hash f8552d13fb700f6437394568eff0a1aa3ea6ee6a0c0dd7cc240a72d1c655d8df
sourceGET /api/transparency/entries/{n}· one entry, as served to this reader· payload served
Payload
{
"timebase": {
"clock": "REAL_UTC"
},
"computed_at": "2026-09-21T05:32:21.256377Z",
"populations": [
"DELPHI_AGENT",
"EXTERNAL_AGENT",
"HUMAN",
"NETWORK",
"VERIFIED_EXPERT"
],
"question_id": "29f1e88a-b6de-480c-bc2f-f234c647455d",
"series_commitment": "d2b940dec1d91ce082dac3c9cc72833be1f5694a689f8f109bb46a4d38517d5b",
"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
f3a5f9722699499d201f66a2fbbc0fb25ddda1ac27e2bc063f51e92762bca406- 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 - 2021
- tree_
size - 2503
- leaf_
hash 6297d4774af7f95ee96c9b608add0c51d16292acb7741ea12fbd0e588671104a- audit_
path (12) 0: 1a3d8790c7c4206bdca4044c2c44e60d9c3e4fd8b338a6a4bf9ecbb365bb6b4a1: 59defcc4a906979317e2f6e25c92d7ac32d4ae374267a453bdac527e246611602: 7660e2db2765be64d01efd42980ff07e8a6308e0d7193fc6af7668888706eb413: 047523647d66613417d2f1d98e5b34804176107904592bfe9c5c125d0685485f4: da4f2279e5b2ba6a3c561625dde3ed65cf2e58731e81644803545a0f57d4673c5: 67597ad3c6d4b363732dc65bb4d4bcf26e23a5338a996842c3364d3486e683a96: c321285e45ea8a57cf869ad4aefceaa5840e364ae5f182e7b0c7b58aab9054be7: 8018b7deda34c522f2ac360ffdd9cc85624549e7457ea594e86a7f04e9a264aa8: 5ab1df6751f0dac25a6ce29d97587d6e08dcdd2d94987223ead725483527e08e9: 5fb1ed5f5a35e845232517268bf48c5384c29f290dd198d1d6f802756a73a76d10: 9cc5fac487aa9ec1c73baef673025a398e2ca2721a82dbc4c270eb2473aaf7be11: aa4b429c2497df4f846fe6b3e60223989226aaf0ba6013dc6f90c17afe986d9d- root_
hash c97f540ea605dcd0a8a4165044c60093cb885a8303800b87d215a424a4d5258d
The earliest published head that covers this entry
- tree_
size - 2031
- signed at
- 21 Sept 2026, 05:32 UTC
- key_
id 042b55492fabadcb8ffb9fe4e9b6a3e8- root_
hash d7dff8ca0510692bba88562f7c5f129ee1e03c0fcff159a2d25cd0840ce2ecb1- signature
9Umj6vHgIBaNgF7jwBQM6ESv34AmXWWEcf309hSjTOzBMxvg5CfN63zw/AUGDCy3iJVWeSOv+291e5B646/1AQ==
sourceGET /api/transparency/proof/inclusion· leaf_hash, audit_path, root_hash· audit-path nodes: 12