sequence 2,176

delphi.consensus.snapshot

Appended 27 Sept 2026, 05:30 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.

← 2175 2177 →

The entry

entry_hash9707c3c7be81REAL_UTC

sequence_number: 2176
entry_type: delphi.consensus.snapshot
entity_type: forecast_question
entity_id: f69e4ff3-bcaa-42f5-a8f1-8044a9975b0f
logged_at: 2026-09-27T05:30:21.911234+00:00
previous_hash: a85da39fbedc72d348fed3f3aafd8c69d88918ab5b7446f39dc4d4c7bd6b9c65
payload_hash: 7f57fea1bf15a259caa2ef0d464b653ad97807e18e40e10648458bfb9e3688df
entry_hash: 9707c3c7be8115ce5fe9ed9ba8049376e96af97882c57dd020a3072306d0dee7

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

Payload

{
  "timebase": {
    "clock": "REAL_UTC"
  },
  "computed_at": "2026-09-27T05:30:21.905440Z",
  "populations": [
    "DELPHI_AGENT",
    "EXTERNAL_AGENT",
    "HUMAN",
    "NETWORK",
    "VERIFIED_EXPERT"
  ],
  "question_id": "f69e4ff3-bcaa-42f5-a8f1-8044a9975b0f",
  "series_commitment": "2304edd2a59c862fcf9b7129bb0758ec3b16a5d2dd152cad820cb8c3c34f04ca",
  "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: 117fd5f89a3f7de2dbd68a541165bbd8a84e362ef39afcb996f417378a53bfcd
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: 2176
tree_size: 2389
leaf_hash: 28263bc3f23ba795b0f30b68d9f38532afd65e24e164638cc50c6718282ecbc5
audit_path (10): 0: 8a1b42d50679c206777e7525d00bd53d86727f659c9cce350478f8d938b88c311: 7afca9334cf087bd42ff045e135da3018aef2cb1c40ed8e5c948f676345359d32: dfaab98a4becfd042fb3b37de69ee41784c4630d9d68442d4ea3bb21a87ae8e93: ed3a76cf89ab882e3f8ce250f3dbb03f8c6da0f1d8761cbe57148314b5bd20a24: ca7191c480f6b18f2aa9dda035866fed87fbdd940ba16b9f842e3e09f1e1efd05: 0349dea9398b8aa40633af547e822a1da687592d53272f4e6aa136e48023a75b6: f30320e32b01d85ee25d3699765f61034c40add7177cc53ee3e39fdfed97b4367: 126596474757e47b31a2f4c9d89412108fada5bcdc7a19a9a1de3d4012be0b578: 03c349147789bfb063beb6c472906eef54792e9077566daa1ada925b4ce9b91b9: c2a61f9c340fe90eca96b6ee3ce7a915f3c652848ec632eaa3e641ee4f30439d
root_hash: 4f7f1a3085d540e3b69ac022c801823029c04ad350f74966858670c2038ea3cd

The earliest published head that covers this entry

tree_size: 2187
signed at: 27 Sept 2026, 05:30 UTC
key_id: 042b55492fabadcb8ffb9fe4e9b6a3e8
root_hash: b1b50955e5089069aa81067ad2479df134298ae6bf7dee437daf781fa54ff0b6
signature: t0dWB84xoVBksXiO35mfeoTvij91UZx6rGZhLHqb2/zFwm5RcmHkzpdfzuu5kxVcT2cgqmmgQGI1XHIHmyc5BA==

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