sequence 2,397

delphi.consensus.snapshot

Appended 8 Oct 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.

← 2396 2398 →

The entry

entry_hash3fa5051c71caREAL_UTC

sequence_number: 2397
entry_type: delphi.consensus.snapshot
entity_type: forecast_question
entity_id: 4bfc7aa0-f12f-479c-ba06-d8e4cebfe625
logged_at: 2026-10-08T05:32:21.077044+00:00
previous_hash: 3dc79f67c13c617339655b35a07c0037c5fe84f6de99d6812d3de628cf4d4139
payload_hash: 2509888faa6c81041b2d119b74de488c815b6370092ba58388f7a2c60c4958a3
entry_hash: 3fa5051c71caa4d907f17fa8a23c28ccfae90dfadab95df48b01ab6d43119757

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

Payload

{
  "timebase": {
    "clock": "REAL_UTC"
  },
  "computed_at": "2026-10-08T05:32:21.065896Z",
  "populations": [
    "DELPHI_AGENT",
    "EXTERNAL_AGENT",
    "HUMAN",
    "NETWORK",
    "VERIFIED_EXPERT"
  ],
  "question_id": "4bfc7aa0-f12f-479c-ba06-d8e4cebfe625",
  "series_commitment": "f2836c5519ae13d5bbef064dc212fea86c921fd8d7a2b12576c1267cfed87b28",
  "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: a04fc6f1dfde21d4aea50c58258b46adda2d2f4feb53e3621bef36fcbc60801f
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: 2397
tree_size: 2479
leaf_hash: cabd5a0cfd742da996c33d6ddae37643d0023b2618f4971d4c610a1621a68ea1
audit_path (10): 0: 4ebc064943b367c7b49ed479e3ce60486989234b240da940810f7a828098db841: cd05bc415f790aea4810bc79a9711e704c7575b2de8b86541db26155de709bc12: 32f4ae1a9c2501900ee51bbfd6de451ca41daac877dbf4a2b3d7134d717c22c93: 6d139f9ed8ada8a8ad0faf4429631a25390bd84f98ec3176d32c2878244c2a444: 5a9b5c3bbfe4872d51680afcd853c4eed3977ea9a65a63d48e58875c83d6ee145: 3e5c5766e4940cb7dda94351a5e27dfc8f706fef9342e7bf2324464ea61fae746: 834c6985c52ea8f25de55920638ea90cbddfd15c7f0b1819c969144787359e5b7: 99ee92a7962953bad0227dbe9ab05c66de08e3b0b7eb51768dee6e3fc62b3b558: 765303d6f29939e50694ecde6538ee53e894bb299166d5a65c9a000adbb546d99: c2a61f9c340fe90eca96b6ee3ce7a915f3c652848ec632eaa3e641ee4f30439d
root_hash: 2135d33fc3b42de9408df8505e145fcd175142e943af391ea41c56bc99a1e5e2

The earliest published head that covers this entry

tree_size: 2405
signed at: 8 Oct 2026, 05:32 UTC
key_id: 042b55492fabadcb8ffb9fe4e9b6a3e8
root_hash: 4eef6060c1a86765c41fc475675c40859e9183cff9ea197195987acb5a90176e
signature: QwUVoQex+SpRs5ZFJNphfLrl+ELAHBLeDYNey7Bjm9lof0t99cJa7JPMsk13JMhvdHw5lnWb+IY/ik34rk9tBQ==

sourceGET /api/transparency/proof/inclusion· leaf_hash, audit_path, root_hash· audit-path nodes: 10