sequence 1,520

delphi.consensus.snapshot

Appended 7 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.

← 1519 1521 →

The entry

entry_hash233c41764c8eREAL_UTC

sequence_number: 1520
entry_type: delphi.consensus.snapshot
entity_type: forecast_question
entity_id: 3707c33d-0301-4c72-8c13-ee685e8a0a88
logged_at: 2026-09-07T05:32:20.476228+00:00
previous_hash: 8f340b657e63be7a2ef9ae6ea319f9ff89ce3a626ee3f6581b94079f4a773ea2
payload_hash: dec3d747792998513762f9388ffafe7979372d9e72f86934525e72931941682e
entry_hash: 233c41764c8e9df6f4017083a2d5666cfac8a9801cef01d685c7bad52350834f

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

Payload

{
  "timebase": {
    "clock": "REAL_UTC"
  },
  "computed_at": "2026-09-07T05:32:20.473630Z",
  "populations": [
    "DELPHI_AGENT",
    "EXTERNAL_AGENT",
    "HUMAN",
    "NETWORK",
    "VERIFIED_EXPERT"
  ],
  "question_id": "3707c33d-0301-4c72-8c13-ee685e8a0a88",
  "series_commitment": "8397c8d3d216896c7c4b968f7a9566d8f1bd5b48e4d7a3c40202746032f5c4ef",
  "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: c9fec9023460e6954d1b4f41ec987d3fe9aee4ea8fce6ee869334444dfe67ddf
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: 1520
tree_size: 2285
leaf_hash: d8b09ac3d393a67e3e2579606f22203feafa59ae2b6a26c5c8741b223da0749f
audit_path (12): 0: 4c8bd9a6b303cffed127fcbd5b5dd438d61ba3802568ebe55495f0223bb1f48f1: 194669b390198130fc31e61e532f4dfcc95b40c7067b3a7cc8ea25127e27d8f62: 13f28d944c2806bfc9b6866bd9cb5693482546314a314d8a8bc86ac9a42668023: 2d5f1c8f0e4cf98870b8991615229d0b85a8c2fa1952ab64005e8c93b7dd51904: 186fd3378c18fea8fb6da7f0fdb301f4b90c8983dfa5aa0bb5375f2b2699bda15: 116fe9e1fce946c94a088265bf94d7539ae1b7eb30ec656da7e96abcaee8da4a6: 35aca0f2b9f8c478040e38216ad4f2e9efa65fae1c6fc41a8df2a826f260686c7: 59548e903d1441fb0d6e6d441d39382bb2fbf2f915e94e4c49c6bda187d8c1278: 73b80563a47162cfa99809097caf5d77512af3a28ebfbf76c6bcfd5f572cc1d29: e4979eb1a845b9e87ed1dae5e71668989143fa3d9cf0261e0f77022718d3602e10: 9cc5fac487aa9ec1c73baef673025a398e2ca2721a82dbc4c270eb2473aaf7be11: a95d574e00e9fefbc454b084e8cb19edc83831071366b2d8dc1af2f7114b646f
root_hash: 17330c6327e6363b8237bd4a68d5ee420a6d0f745c8d8bab0a90305d6bccba50

The earliest published head that covers this entry

tree_size: 1539
signed at: 7 Sept 2026, 05:32 UTC
key_id: 042b55492fabadcb8ffb9fe4e9b6a3e8
root_hash: 5f62430a970697dbff207fbbc55e8c2e5cef33d00f3440f0eb91ce69905c40a4
signature: Cp1jg9rr3x9GvHY4Gcbb4Ye3N4dXZIRAhxuuWkgecXc4Q/yKfKaNU1B/1nlLfseihdJ4SzKVkZGsC9+w/DufDw==

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