sequence 1,817

delphi.consensus.snapshot

Appended 14 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.

← 1816 1818 →

The entry

entry_hash21b000094f05REAL_UTC

sequence_number: 1817
entry_type: delphi.consensus.snapshot
entity_type: forecast_question
entity_id: 29f1e88a-b6de-480c-bc2f-f234c647455d
logged_at: 2026-09-14T05:32:20.128497+00:00
previous_hash: 7df096fb13b2532e29e389ca4fc6e039f214a453964a5c30c398aa931bd8cf88
payload_hash: 0b3b97b5e112d9ab3a5f55864316df0af00dd24534f22ea6c59a0c916f3917cc
entry_hash: 21b000094f0596023a03937deef238631b4ec532ede5b8967012c3fc7360916e

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

Payload

{
  "timebase": {
    "clock": "REAL_UTC"
  },
  "computed_at": "2026-09-14T05:32:20.125975Z",
  "populations": [
    "DELPHI_AGENT",
    "EXTERNAL_AGENT",
    "HUMAN",
    "NETWORK",
    "VERIFIED_EXPERT"
  ],
  "question_id": "29f1e88a-b6de-480c-bc2f-f234c647455d",
  "series_commitment": "acf60e345fc5a19e93d060c029414624be1c272307f1cfd1fdabd6a4df1c2f57",
  "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: 7a4cd29920fcf233ec78c33fe2faa6427f05f99f96dd1b9b931d35ce0b5695b1
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: 1817
tree_size: 2491
leaf_hash: de9c12d7aae774ac76b8c01f3fcccdbdfb3a39fc2c396c0ede0d0f2ee6c91d9a
audit_path (12): 0: a6ec8ed4580a5521ee84b9c88eeaac5de4287efd1157c03db878c59c51f95e501: 6cb5362ecdb4c45c36be172251ab7079882aca69d139591823c11acc86a701e72: 1317a0d663424f6e991bec71799fd0fea592164504cd566df9a57fe276dffe243: 6ce51839d4e7c758a257178f42e379fb962bfe38fa2fbc19439695a93a4e72934: 910ebb775e841c1de5206f3757643ca7d376ad37a8e3efed1b2f1d57a8b5e2085: 35e93264a628694567ffa81b9f6b6754295524d7648668627e7e79e320561d416: 66e877548a61fd36a62ff399c81b1533c5b6efa4d42185e861a4558efb824d297: 250a7c52b8fa3c4932ca872a3a7842e2fb00579ab86c9b5fb8782329fdedf9fc8: 5ab1df6751f0dac25a6ce29d97587d6e08dcdd2d94987223ead725483527e08e9: 5fb1ed5f5a35e845232517268bf48c5384c29f290dd198d1d6f802756a73a76d10: 9cc5fac487aa9ec1c73baef673025a398e2ca2721a82dbc4c270eb2473aaf7be11: 083d0806ed3c3d656f2d8c4762013d3fb4c0ed984cb03e95e8ae46936f2431df
root_hash: a9a1dac66ff7c8ec3d4b27b434ff70fbde5df3ef3dcd4b4fe4b41bb80f78a7c7

The earliest published head that covers this entry

tree_size: 1827
signed at: 14 Sept 2026, 05:32 UTC
key_id: 042b55492fabadcb8ffb9fe4e9b6a3e8
root_hash: 6e05cf324ce30b70ee7ce89eee15228fde23a83f821f9ba8523ebaf1d8fefc5d
signature: uMGbdZogepiib7kJvGrMkp166pSNlL4XyQglenQ+IL0wzHUIeA4uonjnlmZa4EixtTu6l4fAF5nBpky7UwM9BQ==

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