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 - 67
- entry_
type delphi.consensus.snapshot- entity_
type forecast_question - entity_
id 24c5a768-70af-4997-afe5-05e9edc2e4a7- logged_
at 2026-08-15T15:53:37.891497+00:00- previous_
hash d5b3c940da5943f90ffd27adde4378f1effeebb26b4889ec3580bc45201455e2- payload_
hash 9e6bbf72a094265fe515946376e74550973a50e209d36cef5c1cdeeeb6cf21ed- entry_
hash ecdd06e7285272d2706c7ea712852006dcf384bb81b064daa376ee711d4bd954
sourceGET /api/transparency/entries/{n}· one entry, as served to this reader· payload served
Payload
{
"timebase": {
"clock": "REAL_UTC"
},
"computed_at": "2026-08-15T15:53:37.888133Z",
"populations": [
"DELPHI_AGENT",
"EXTERNAL_AGENT",
"HUMAN",
"NETWORK",
"VERIFIED_EXPERT"
],
"question_id": "24c5a768-70af-4997-afe5-05e9edc2e4a7",
"series_commitment": "fa8cde92b6a9b9c0537b5e3c331ced1b32c2e9958c3b0aa71f5ee7b11f407820",
"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
84f3a256ccf6a106a6996dcac8e155387e2b792aa320a8099b9db782dadc894b- 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 - 67
- tree_
size - 2265
- leaf_
hash 2ef0c35f3a17127abd6a04f48c4fd085e1040e48c6c0d072fa6bb057d0910e2b- audit_
path (12) 0: c153950e288e34147ef6f158b6402bfd29b2b9711f8f4e395a1b679a7e34ca3d1: 8ea88b6be8ae25f8d511e2f0a60728b008aec10ab40e06814f478fd17b24cdd42: 40ecbcca1de18289107f2ca219e58a6a6395d60f627d6771a43cf367290f31023: f4a68b91efeded9ba075d89086c93a42419b28e2a8d1828dc64e70cc58b74a724: 90ca477c832ae34ed00dfa76c2b10e36cff69ccd72ce614d0c507e05920007b15: bfda397922356f7a423fafc090d2af03517b89157a8d6cc66d277e2cca96e8316: 9fe2edb4769e24911c893b0836891045cef78ef8ed4ae19ec89e6d92edfad5a37: 925d039cfaa2795efce751d71988395a9d8544d4910a71d82c761e6c8e51ba2e8: 6e5b02022079dc614c5f74ca1c784cf9700d832e05c2eec11f0ad0a37376b46d9: 2fb679aab258481705c982e553094522ea7bb93361711a8387ebf359e8c3e43110: 86666e2cb262024eb1c2584c671184dc2fb8b8d41a345bde94ca518e487ac23911: 15428b80842f9a0801cf7667918b216c9ce4186d9825e806ba86972b039c03f9- root_
hash 0feab2262fa1e39174e25fc17ea9383a6fe15fa5d22c96afd722849e59baa3f5
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