delphi.consensus.snapshot
Appended 1 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 - 1224
- entry_
type delphi.consensus.snapshot- entity_
type forecast_question - entity_
id fc61e6d4-5001-4db0-95d4-be60a131bd47- logged_
at 2026-09-01T05:31:21.056535+00:00- previous_
hash c500fcff9499e2cd38960dd8ce6985890aa58c3f6615fcc873fac09667fb9539- payload_
hash b3c666e473c23f4dcfbf37af35d25fd25e4da0b4b5a01625ee77059068382839- entry_
hash bb11fcb8c1c247d3ff77076afb9e99d4482d4a608260552d2dfb892c7a523635
sourceGET /api/transparency/entries/{n}· one entry, as served to this reader· payload served
Payload
{
"timebase": {
"clock": "REAL_UTC"
},
"computed_at": "2026-09-01T05:31:21.052354Z",
"populations": [
"DELPHI_AGENT",
"EXTERNAL_AGENT",
"HUMAN",
"NETWORK",
"VERIFIED_EXPERT"
],
"question_id": "fc61e6d4-5001-4db0-95d4-be60a131bd47",
"series_commitment": "b2ccad0f0cb22c185c3079cc2dd3a184d2f92124ceda6dc34d5020e6a6a13796",
"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
387e3c00b5cc1f48097b9da2e7a1a55c67c31996e4c6cc0c3a764a43e3941f45- 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 - 1224
- tree_
size - 2239
- leaf_
hash 2f41227aefa42653163402a3af9fdc323b7e5af5d345dc33168308167d29e61d- audit_
path (12) 0: eafe060e2214e941d8664c8e1c8687eb26e989a45583a3d4471bd00ed3a1920e1: da79680335f0bbeeaf664967980184b5d18e69543f81f77b4c7a87fb6e345aec2: b206c0ddf28d9b6520058290f5ca00e6584d310d77cda95f2b2ffd24ad2dd4713: 3e43b19ae1e010c9bbaee35143d66679c4c85073c09edb6246103e2956c861f64: 51b434f905bc1d03aa1c4c7891c9a2bd50345d7f45cdca5e0097915161d83bfb5: 6457d041f692165a2d435e4fc16b6e2b8617893057f2ad51fdffb8c9363d31346: 669172607016fd0304cbb59132e0f82cb4f48e391f29d72a97f4ceee2d3ffff47: ccb0e9f17cd47f20723bd8ade751778a3fd4e9649264dffce135260eaca872fa8: 6ce18fb0b650e54a2c9454c3e9abde48f8386826f5bd1752662ede2993ff557e9: e4979eb1a845b9e87ed1dae5e71668989143fa3d9cf0261e0f77022718d3602e10: 9cc5fac487aa9ec1c73baef673025a398e2ca2721a82dbc4c270eb2473aaf7be11: 9203a1600de814d3afb819f841569332c7e3b58c4d0e0ea56c377729f25dca49- root_
hash 03dd6fb33b4bd65222257eec0069956926795f14f7354795bcb42af5fe51ba08
The earliest published head that covers this entry
- tree_
size - 1253
- signed at
- 1 Sept 2026, 05:31 UTC
- key_
id 042b55492fabadcb8ffb9fe4e9b6a3e8- root_
hash 3cad2e0ecd54264a32b17f29b929d62f47446173c606f2674397638082b88c60- signature
SHbETlpvRB27T/YGfMM7HotNXTLex8tuCpVRhveEwor5ov11zp/0/nH9vNjfR6pUQvGFOvKwCymEB9fXzs55Dg==
sourceGET /api/transparency/proof/inclusion· leaf_hash, audit_path, root_hash· audit-path nodes: 12