sequence 2,180

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.

← 2179 2181 →

The entry

entry_hashdf8f301ab9e5REAL_UTC

sequence_number: 2180
entry_type: delphi.consensus.snapshot
entity_type: forecast_question
entity_id: a8c36f16-c0df-49f5-92d5-29bb1d0e58a9
logged_at: 2026-09-27T05:30:21.957517+00:00
previous_hash: b38211b5cb5630ba5b25161a10d8dcd9ee2fdb86fe710bef88cd5febe252ad30
payload_hash: 8dd259d365f64386f7346601cae1580dfaf9fa87eabec749fd63b7f9e5780046
entry_hash: df8f301ab9e5fa0d4607100a5a268e556a47c6958f2752549547cf51c63bf1a5

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

Payload

{
  "timebase": {
    "clock": "REAL_UTC"
  },
  "computed_at": "2026-09-27T05:30:21.953717Z",
  "populations": [
    "DELPHI_AGENT",
    "EXTERNAL_AGENT",
    "HUMAN",
    "NETWORK",
    "VERIFIED_EXPERT"
  ],
  "question_id": "a8c36f16-c0df-49f5-92d5-29bb1d0e58a9",
  "series_commitment": "33334d1e5562a5eaf911b3d37886cdaceb5f0b763b0af3822d44a4616b5815be",
  "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: 1e141c2cd57b84afaa8c74fb8a98f3e3ac67a44881c02e5178d0bd90ddf413df
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: 2180
tree_size: 2515
leaf_hash: d8eaf2c148b2a50e4ea1343e1d45323de5da0ed411cb6df39117e6eaae8ba585
audit_path (10): 0: e7569370b59ced54a058260f86ab4724d977ac9e69a77e0dd1fbb0bca89ac1c11: 3eaf68433ce20a3fe2a3bde21ac5dc70447fada706d09677ae46837e4cc6d8472: 52cae77b712fcb14996320482e9809b32d84d1c5305f456cf0ad352f9243248c3: ed3a76cf89ab882e3f8ce250f3dbb03f8c6da0f1d8761cbe57148314b5bd20a24: ca7191c480f6b18f2aa9dda035866fed87fbdd940ba16b9f842e3e09f1e1efd05: 0349dea9398b8aa40633af547e822a1da687592d53272f4e6aa136e48023a75b6: f30320e32b01d85ee25d3699765f61034c40add7177cc53ee3e39fdfed97b4367: 126596474757e47b31a2f4c9d89412108fada5bcdc7a19a9a1de3d4012be0b578: 42bcd2f1a75494aef2c027c7b7df37127b336fd1fc6fe4575a64ee72af9e41b19: c2a61f9c340fe90eca96b6ee3ce7a915f3c652848ec632eaa3e641ee4f30439d
root_hash: 94ed3e67e0f3ca6ab90e872a7f03020d191548311e8610028e47ddc18fbfbf90

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