sequence 1,738

delphi.consensus.snapshot

Appended 12 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.

← 1737 1739 →

The entry

entry_hash1ccfc13333faREAL_UTC

sequence_number: 1738
entry_type: delphi.consensus.snapshot
entity_type: forecast_question
entity_id: 3b1bf8d0-fa87-4392-b4cf-333e6cba3622
logged_at: 2026-09-12T05:32:20.898343+00:00
previous_hash: 84297024acb23f70563eec822db19c93c4707ccfd7e6f683e09507184bc4c3df
payload_hash: ac895147ec09091a54dcbd0c417306007212fb3b89d4e2807f2f923a49c0f8c1
entry_hash: 1ccfc13333fae6a63de2442f35fec68a4159122deb2f266714d122a5ae37410c

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

Payload

{
  "timebase": {
    "clock": "REAL_UTC"
  },
  "computed_at": "2026-09-12T05:32:20.895875Z",
  "populations": [
    "DELPHI_AGENT",
    "EXTERNAL_AGENT",
    "HUMAN",
    "NETWORK",
    "VERIFIED_EXPERT"
  ],
  "question_id": "3b1bf8d0-fa87-4392-b4cf-333e6cba3622",
  "series_commitment": "b2762911dfe63502aa7694827f7f8bf1baaa718e612dc946e919906b52adbe8f",
  "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: 0029c37c0579b9ec3fd07a507bb2dcd2c1c97369ba8f446590eff24aad211599
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: 1738
tree_size: 2305
leaf_hash: cf7f844fa87af3191bf6ea75826956f18691f7d2c2212243ff95e9b7b1104870
audit_path (12): 0: ff6ea4973d2222cf096f71708e14354828f91d137abd0703dac2d00248e8f6c81: 19d0536740cb5a6bc78d4e6301fe4cae8d7d18b0a94a5e9586ae6e6b9c82b4ce2: 4175cc4cebe6e682022c589321051accadc556b88f023bd207f3f5dddb63cfef3: 635aae6193961455327075b2fe16ff662110a049f19d8f0882cf12b56058acb74: 0c9bd5c162fc6aaf5d9bf93b62d6c7267bc3226cfca9518555e4803f850180b65: fd82ea2957dec252aaf0f497194cc97cb06fa6fdc01911c77e1a2e46ff4eaa336: ac160a0852932e7e1298c12b7bbeac8a979011b4c86d850294a53e9c58329b547: 89bbeb672caa03ccca78c3e7d709e14d72ed0f279c7cfcd435bb71dc863239c68: 49fbc719d10777c21e02e255a1174dbc47e89c67c7b327c5f50e8ea1ffbb5bad9: 5fb1ed5f5a35e845232517268bf48c5384c29f290dd198d1d6f802756a73a76d10: 9cc5fac487aa9ec1c73baef673025a398e2ca2721a82dbc4c270eb2473aaf7be11: 4ed47b3cf2c766bbf573b761e9026e21f264edbbd6420d65b1efd886894c770c
root_hash: 9259657b60d7c54c7f061a7a621bf2f8747cab0885ee335ac1ed3b6657c9740d

The earliest published head that covers this entry

tree_size: 1749
signed at: 12 Sept 2026, 05:32 UTC
key_id: 042b55492fabadcb8ffb9fe4e9b6a3e8
root_hash: e8cba9a99f4a57e7aaabf2bd0c850bb0715afb51953cf8fcda65ca036a6c608e
signature: cNlPz9oqpkHabbJeJhuOvJLMF32ooelAhyWb8yHCQmsqZM9LEZ0petdc0dMGAZbz5avsJ6pUSC4TluX7fEBpAw==

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