sequence 1,064

delphi.consensus.snapshot

Appended 29 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.

← 1063 1065 →

The entry

entry_hash4c5acef8ee43REAL_UTC

sequence_number: 1064
entry_type: delphi.consensus.snapshot
entity_type: forecast_question
entity_id: 3b91df80-00fc-4a4b-b86e-3310edcb9332
logged_at: 2026-08-29T05:31:00.408899+00:00
previous_hash: 24443c355f97cd230136562e5d13700bc0ea980ea8c950b846c825f2d0297e0b
payload_hash: 1d01e6ac7a7d7d9fd324f7596edbdfd7123ec50a62ff9a9f4a3b05b9281dce2f
entry_hash: 4c5acef8ee43652a51ee0b6d6779854efe64eb635b9e166928190a711578fef2

sourceGET /api/transparency/entries/{n}· one entry, as served to this reader· payload served

Payload

{
  "timebase": {
    "clock": "REAL_UTC"
  },
  "computed_at": "2026-08-29T05:31:00.405953Z",
  "populations": [
    "DELPHI_AGENT",
    "EXTERNAL_AGENT",
    "HUMAN",
    "NETWORK",
    "VERIFIED_EXPERT"
  ],
  "question_id": "3b91df80-00fc-4a4b-b86e-3310edcb9332",
  "series_commitment": "7b0ac81bddadf9c5188be35b10b05ac719c4ef5baac3252b10159721b70da86c",
  "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

migration 0021 salted this digest · both versions coexist in one append-only log

commitment_versionv2stated in the payload

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: f88b5fabf604d5516597fa30cc5c36b9075d1a204fc2fc146d88e1aa54652587
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

computed in your browser, not on the server

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: 1064
tree_size: 2357
leaf_hash: 193f78470ea9d5df40cb8b48e525c7b7cfef4e4a1657641981f83bbe265815db
audit_path (12): 0: c61586b0ca2357d1b9428b01a3d2a7fb17e81711dccf175f9f0f4c9b3cf3ecd21: 1db8c1460af9a2b9ea4cfa28ff4a6f1984aba3785ee4e2584ab69bc72dcc9e392: 521525056cebd8ff3284b2479453a6a5ee7ae0140c1f79d995e02d3fd7ca2fed3: c705dc950b6265e897e5e5b6369cd3ebd20c008328f3443b0640b0d704423a7f4: d0267cbc326f3cc9e4ff338f21eb34ace34989c2f89b76c958e5491bfb9fa3ca5: de01980cc2d9fbeb76026da9c048d75551c73417ef383a31739b0bbf4a69e81d6: d82a2e270b0289b874ebb92edc37695f28bdf9f53266c9bda129fd6b58431b787: bbfee2f96690132143d2a2a16089df72535201b31174873b1f1a4d4c85a029a98: 6ce18fb0b650e54a2c9454c3e9abde48f8386826f5bd1752662ede2993ff557e9: e4979eb1a845b9e87ed1dae5e71668989143fa3d9cf0261e0f77022718d3602e10: 9cc5fac487aa9ec1c73baef673025a398e2ca2721a82dbc4c270eb2473aaf7be11: 2f361a0c4a49843181536f3a7baa572ba4bc0573be4bb8272112c3d056aa1031
root_hash: 58c8c5ab99dba36e8c6b398578e37592253a716c9cf756f72e78b6606a198d59

The earliest published head that covers this entry

tree_size: 1073
signed at: 29 Aug 2026, 05:31 UTC
key_id: 042b55492fabadcb8ffb9fe4e9b6a3e8
root_hash: 5dba160bb906a884e1f1fb90970356c08cd125402790a82dec37eed1ce1dbf60
signature: pp/gqpXj883uC3rBTWjoYIk190+lqVqjxj7iskZY/ZhrKiUo7PHanG0AwhJgLmVKUeHax3qxw2kQjeT8SweHCw==

sourceGET /api/transparency/proof/inclusion· leaf_hash, audit_path, root_hash· audit-path nodes: 12