delphi.consensus.snapshot
Appended 15 Aug 2026, 15:53 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 - 27
- entry_
type delphi.consensus.snapshot- entity_
type forecast_question - entity_
id ba007bf6-84af-41a3-bad7-f36ecf2ac953- logged_
at 2026-08-15T15:53:36.118215+00:00- previous_
hash 660529669c5d28af23f2999783a5dbc8e6ceda848baa39041e849ca29693fe55- payload_
hash 311f4e5af7b0c55d45518730eaea83624e3722995911c91ee144bbc28f27ea80- entry_
hash 1c761165566fe951a960975617bcb6ca8e05a14bb1b98d4e8ac272d9421eea3d
sourceGET /api/transparency/entries/{n}· one entry, as served to this reader· payload served
Payload
{
"timebase": {
"clock": "REAL_UTC"
},
"computed_at": "2026-08-15T15:53:36.114876Z",
"populations": [
"DELPHI_AGENT",
"EXTERNAL_AGENT",
"HUMAN",
"NETWORK",
"VERIFIED_EXPERT"
],
"question_id": "ba007bf6-84af-41a3-bad7-f36ecf2ac953",
"series_commitment": "f2d2a38069faf95c34607934f8d73227455dffb8736a95d8bf4a4574020646e6",
"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
867b8156c0f730ae6fb5a31c410593b2355a4bb2fca5070d2590de941f54b8a3- 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 - 27
- tree_
size - 2285
- leaf_
hash 4b80680a00c9fa3f9330a2b3ffcd20dd54d14531a3190a7e4fdddad72bf5651b- audit_
path (12) 0: d909540080eb4d697ae5bdf6a502548e80aad4956c95a422ae5a9a31fce697ad1: 143f0bb32796d42c9f3df69f3d99492112ebe710d90fd1b52a424032aca9795d2: 9388af5d6c467dfae025223077240609a9f56df811b859f128b52d504c7444693: 1cf5d64fb4965f4940c526fa698108d7c4578146408b3cd51dabd149d5674bd74: 7d6682fa6e600d077f7841e30621efe19877a3f61ce600d24a3eb3948d17dd255: b74c92a6356a40d4a8987db99772ead75d18bf349905054ba53bbc3401d9b2b96: 432b3bec17cc8d9bd118f5d2d11fc56d0578ec1940af60be2192f2f1b8d43dc67: 925d039cfaa2795efce751d71988395a9d8544d4910a71d82c761e6c8e51ba2e8: 6e5b02022079dc614c5f74ca1c784cf9700d832e05c2eec11f0ad0a37376b46d9: 2fb679aab258481705c982e553094522ea7bb93361711a8387ebf359e8c3e43110: 86666e2cb262024eb1c2584c671184dc2fb8b8d41a345bde94ca518e487ac23911: a95d574e00e9fefbc454b084e8cb19edc83831071366b2d8dc1af2f7114b646f- root_
hash 17330c6327e6363b8237bd4a68d5ee420a6d0f745c8d8bab0a90305d6bccba50
The earliest published head that covers this entry
- tree_
size - 374
- signed at
- 19 Aug 2026, 20:25 UTC
- key_
id 042b55492fabadcb8ffb9fe4e9b6a3e8- root_
hash ecf4adc708ae542a0339e03fd4cc181cf49d0329768627c5345c915a58bd813a- signature
3yL+JZfMhiQ6rm5rCTTg7iT+or04nCGVcQ08ILMw/d7eqvR4Jid7cEg2rQU5fCX7llStjVkTC9jVZjfGQvtMAg==
sourceGET /api/transparency/proof/inclusion· leaf_hash, audit_path, root_hash· audit-path nodes: 12