sequence 2,175

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.

← 2174 2176 →

The entry

entry_hasha85da39fbedcREAL_UTC

sequence_number: 2175
entry_type: delphi.consensus.snapshot
entity_type: forecast_question
entity_id: 3b1bf8d0-fa87-4392-b4cf-333e6cba3622
logged_at: 2026-09-27T05:30:21.898234+00:00
previous_hash: 440cc7d9c5b0dfb462f366e79d6c09b201af559a2a5a3c2b2ae36f812f337b9d
payload_hash: 10b1d94bdf083ade7224e56dca36b8dce3d0d58e1c6c24bc44c49729f35f59dd
entry_hash: a85da39fbedc72d348fed3f3aafd8c69d88918ab5b7446f39dc4d4c7bd6b9c65

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

Payload

{
  "timebase": {
    "clock": "REAL_UTC"
  },
  "computed_at": "2026-09-27T05:30:21.893335Z",
  "populations": [
    "DELPHI_AGENT",
    "EXTERNAL_AGENT",
    "HUMAN",
    "NETWORK",
    "VERIFIED_EXPERT"
  ],
  "question_id": "3b1bf8d0-fa87-4392-b4cf-333e6cba3622",
  "series_commitment": "d923749499ef8765a62b2faaa3c0d20659442b5f3cc36cad346f3b617463d830",
  "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: 71ee52501510c9c8101264d59cc2366fd50ca86c42b28ea5e4b4f4f4bb3befe2
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: 2175
tree_size: 2389
leaf_hash: d8ff3861039c73f0b6b32930fc0cf6eaedfc22258bda42573e0350bd615b021c
audit_path (10): 0: 23dc5349bda29a9fb4bbffe052ecf65d2aa86409dbcaaf0f9863864cdfcc38411: 9b1e12d6d39a8c4e38649a953a237b9c95bde057280f42fde222061dc9814f792: 93223be8e555a6577a4d09e1c9d5883bf398350b554a5368d9bb7fdbe5d6854d3: bc54494ec26d46ee6d53a8ac2b531e6f585610511b47874527317bc58b5c78604: 9ae41f12a8d808947700fd5bb9f854759bbc814a9dd681b7d300197e26a268795: 50cc49d79f0f3c552cc19006c4d6b819801e07bb4acb2a3fb50f66393c28555e6: f4d02cca79f588f9c172b1dc53f54784db35848f8f8b4fa96ae1493d76b463787: 32d97e61743fccf6d32da7a407cb944cdd5c52aa0de4e874e2c78dadf7892a908: 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