delphi.consensus.snapshot
Appended 24 Aug 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 - 741
- entry_
type delphi.consensus.snapshot- entity_
type forecast_question - entity_
id 7fc5454c-0827-492e-a574-d01f70586fc4- logged_
at 2026-08-24T05:31:21.328691+00:00- previous_
hash 5fee69a12dfd73466b49c7a4062528176606bbf75f656fb7c232b9608921d4c8- payload_
hash fd6e9cfe0878138601266b13ff11612ee238b348cb42a885d4770d4f17f9d9fe- entry_
hash cac2185360d0eda9966a737db691bc3909990a1de146ec1c033c9db50b320d19
sourceGET /api/transparency/entries/{n}· one entry, as served to this reader· payload served
Payload
{
"timebase": {
"clock": "REAL_UTC"
},
"computed_at": "2026-08-24T05:31:21.325268Z",
"populations": [
"DELPHI_AGENT",
"EXTERNAL_AGENT",
"HUMAN",
"NETWORK",
"VERIFIED_EXPERT"
],
"question_id": "7fc5454c-0827-492e-a574-d01f70586fc4",
"series_commitment": "f9883dad185c2652221f94ad89d06534af741910b75b8d2a2caaf9205ccb77b6",
"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
94624a7ca4232b9620b6ef52c7a1061239ba73ac67a29f36a086d5b4264d9cc1- 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 - 741
- tree_
size - 2305
- leaf_
hash c42cb3264496373f4c93d8a65884712396d275f6d268c7a6a450b7cf45c55a89- audit_
path (12) 0: c7dcc5cabe0f28dfaf212faff1c5f40e58306b8192166f30e971fc3ee43b30d81: b240e67604727b9b298075058bd1d27c46ac57f1f8aad3f871c18eb8507611862: 37e17c7b949faa10e98938586e51e0d65cc65c6d52a9f158841c2f2003d1d0ab3: 43e219b6cf0552c7bf6ce8cb021ae3172500fa073b9234e882bcc222f68315994: 8335811e9c7fe8827b37303eaaa95d4a6488055638006b48e867a188b026e5385: f61c26919896eb83bd50507688cc1ccfc0bb60fc4cb57a63d694786e83bb71096: 973deb9be25f19e01b3343769d1f20b7f7bf6fe2638c57970f015700d2ee78897: 9580dc2d498dc3b39d2b35bfb7dd13e8996199674c5dfe44e04c8ccc43e9c0d88: 1ed805746441fabcaa9e107f622f886b1692796b8a67f3eaf5f2122c01401d239: e5a5c76fa4bfc3f31f74c026263990b303ea76d2ec828987b307239036c908ac10: 86666e2cb262024eb1c2584c671184dc2fb8b8d41a345bde94ca518e487ac23911: 4ed47b3cf2c766bbf573b761e9026e21f264edbbd6420d65b1efd886894c770c- root_
hash 9259657b60d7c54c7f061a7a621bf2f8747cab0885ee335ac1ed3b6657c9740d
The earliest published head that covers this entry
- tree_
size - 767
- signed at
- 24 Aug 2026, 05:31 UTC
- key_
id 042b55492fabadcb8ffb9fe4e9b6a3e8- root_
hash a28d9edb9694f1cda2f626078fae254accc380b4f2549aa7194ad4e4bd63a67a- signature
JMkjMTErBa2bqo2Rs6CcdmWk6Ehro+QvUn6ngPbf4o9ZZnLXtGSJxijgC+C0p5sEaXG37JHg4YRCxAbtVD1mCw==
sourceGET /api/transparency/proof/inclusion· leaf_hash, audit_path, root_hash· audit-path nodes: 12