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 - 1691
- entry_
type delphi.consensus.snapshot- entity_
type forecast_question - entity_
id e732630b-b551-4965-92e6-7168c5a86d89- logged_
at 2026-09-11T05:32:21.295196+00:00- previous_
hash 0ecf132c3801d44959789b326a50b241ccf2b9c90f617fb38b7fb65240930969- payload_
hash f48d586241287834a79626ab1ba5af58caf8549dec75ea4e9a30fffc61311dbf- entry_
hash efafc44e1e2a9e5d2aff84e203050e35db6e773ed14279de2c0c57b692f49b01
sourceGET /api/transparency/entries/{n}· one entry, as served to this reader· payload served
Payload
{
"timebase": {
"clock": "REAL_UTC"
},
"computed_at": "2026-09-11T05:32:21.290907Z",
"populations": [
"DELPHI_AGENT",
"EXTERNAL_AGENT",
"HUMAN",
"NETWORK",
"VERIFIED_EXPERT"
],
"question_id": "e732630b-b551-4965-92e6-7168c5a86d89",
"series_commitment": "7f9ea9d9f63d01e220303e50ae324c527a3c90a2424571135640b633a7cfc1b1",
"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
9667ba893f4722f6ec6f8064789add2fb10fd3c239c37e2b40cc88fad3657b9e- 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 - 1691
- tree_
size - 2265
- leaf_
hash e0c3597a69e6f1d4cfcfc89ffa208d5fc1410cd5cb7d6b378c88c2040303504b- audit_
path (12) 0: 47c067f1dd52af3357f19b2ddceaa914d2385221a4374c7661ea933d98fd65441: 37392c97e7f1babf5191ba5c43d192f224d3bdd12337ac29e26393a63881f2a62: 3c8c79f4c2fbc521005667d563049ea3aa0c2fd9a1fb54f5be4e4de9582fbefd3: a71166ec0bc591942b11c00947c6b0d0bfc23ecd77c6bbc01d6eff52642a75a84: 58ab6b571e4523ea252504b45981c61c96978b26cbb70e0525c1539b1b7ed8bb5: 8453c042861ef52e19b9d1a9a8f53516dd414e406f8674b7dfe3260c435b50cb6: 67d3a5f070d2cf8390b34d7293fad5757f74160be9bb198580c670e63fbcd4217: 89bbeb672caa03ccca78c3e7d709e14d72ed0f279c7cfcd435bb71dc863239c68: 49fbc719d10777c21e02e255a1174dbc47e89c67c7b327c5f50e8ea1ffbb5bad9: 5fb1ed5f5a35e845232517268bf48c5384c29f290dd198d1d6f802756a73a76d10: 9cc5fac487aa9ec1c73baef673025a398e2ca2721a82dbc4c270eb2473aaf7be11: 15428b80842f9a0801cf7667918b216c9ce4186d9825e806ba86972b039c03f9- root_
hash 0feab2262fa1e39174e25fc17ea9383a6fe15fa5d22c96afd722849e59baa3f5
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