sequence 1,516

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.

← 1515 1517 →

The entry

entry_hashb6bc6da5f2b4REAL_UTC

sequence_number: 1516
entry_type: delphi.consensus.snapshot
entity_type: forecast_question
entity_id: 28453d7d-6676-414d-a36b-2fcf2cf13265
logged_at: 2026-09-07T05:32:20.435639+00:00
previous_hash: 6f6b57746c62555873e9d8b1d9d63e3e05832c3931ab7a8d29f361f5a63fe99b
payload_hash: cc31f224c3eea48814dfea93c3486b25be93e0f912ceb83beae6518a8fbb4a4e
entry_hash: b6bc6da5f2b449e8989ab50fba96a79186639f022990385578d4ec9c2a936145

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

Payload

{
  "timebase": {
    "clock": "REAL_UTC"
  },
  "computed_at": "2026-09-07T05:32:20.429042Z",
  "populations": [
    "DELPHI_AGENT",
    "EXTERNAL_AGENT",
    "HUMAN",
    "NETWORK",
    "VERIFIED_EXPERT"
  ],
  "question_id": "28453d7d-6676-414d-a36b-2fcf2cf13265",
  "series_commitment": "4569c874183cf0ecf05cb07cfc23630f59d4eb1dd855404dab3889a18b0afb38",
  "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: 4827a06f08a875d1951f5f9f1b0085e5d7081ef99b43980de057d13408c348b6
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: 1516
tree_size: 2285
leaf_hash: db9a6078ff311bb04dd94f105c59e10f8a8168b54611ab0eea0d2f2e6656f98b
audit_path (12): 0: a8beb466cabedb3ae8db6d160953bafd2c478f74562e4c6d283b674b4a96f8841: c11c83b4f517b5384a5d90f7064b33279bbe64b7f4ff1a5e9cfe643d8dfec0012: 6a424c4d3bf25c045cabb4ec4faed92a7eb1f02a6330b470aef2869fb779b9db3: 1dbd675448dc84edc9ad7f1b007fbfe61898594ab192a12cb258835692bbc3e64: 2865852750e0901757d4fa42b4a15129fe3a234b931d0736a755862f8d7e79ce5: 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