sequence 2,254

delphi.consensus.snapshot

Appended 30 Sept 2026, 05:31 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.

← 2253 2255 →

The entry

entry_hashc3bc164f8ec0REAL_UTC

sequence_number: 2254
entry_type: delphi.consensus.snapshot
entity_type: forecast_question
entity_id: f69e4ff3-bcaa-42f5-a8f1-8044a9975b0f
logged_at: 2026-09-30T05:31:20.366595+00:00
previous_hash: 0aae7c9e2209bf4e9f620dbbc605b6617512437acfe04281024119397a496fec
payload_hash: bd1e6834b22a1493199a6875d20c3db78168902935c54e16274c3e99da55e531
entry_hash: c3bc164f8ec037456dad6e403fbf1c14ea9de65fc27413706221078cd556d3b4

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

Payload

{
  "timebase": {
    "clock": "REAL_UTC"
  },
  "computed_at": "2026-09-30T05:31:20.360409Z",
  "populations": [
    "DELPHI_AGENT",
    "EXTERNAL_AGENT",
    "HUMAN",
    "NETWORK",
    "VERIFIED_EXPERT"
  ],
  "question_id": "f69e4ff3-bcaa-42f5-a8f1-8044a9975b0f",
  "series_commitment": "4807ba66c16a9dee965a93a440b92fe658748b0641899f86af6ec10cca886ba8",
  "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: 26f0346ca93fad6be8077c2d41dc190f980d53f49684640a215b2dc9a5b46ed3
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: 2254
tree_size: 2389
leaf_hash: 0ea991877bf5089bb63114c1cc0a25e2d76103566bc97181a5e2d82157a60785
audit_path (10): 0: fb2278072a8090329ee7896df6ea819d226fb9ebc05a6a39f03c97c346f440e21: b2f0393a844a68329314e78a1d8e82a0cb7af412e97df84a4c5d32f97289c08c2: 90b974b0e4590b4981b5a36c163e525a998e5187759683a0722edf66b7dccab33: 3c4fc56980af2aa0f69b5f9d58fa505229ccc5321b0a2659bd6ffbf9489254dd4: c068edafbe1d556931252450f48dd023302a27a3e529738c33e3d621eba495945: dcb1e788d76f2f9a839c0389799b0d205491dea92f2f56774d104d9ff08eea1a6: cbc4db984571c13242d6f4b551c8d58b2ac60b14ae1df2945b6a2428d447c0bb7: 126596474757e47b31a2f4c9d89412108fada5bcdc7a19a9a1de3d4012be0b578: 03c349147789bfb063beb6c472906eef54792e9077566daa1ada925b4ce9b91b9: c2a61f9c340fe90eca96b6ee3ce7a915f3c652848ec632eaa3e641ee4f30439d
root_hash: 4f7f1a3085d540e3b69ac022c801823029c04ad350f74966858670c2038ea3cd

The earliest published head that covers this entry

tree_size: 2265
signed at: 30 Sept 2026, 05:31 UTC
key_id: 042b55492fabadcb8ffb9fe4e9b6a3e8
root_hash: 0feab2262fa1e39174e25fc17ea9383a6fe15fa5d22c96afd722849e59baa3f5
signature: sBjF7+G1kwx7TvtzLvw4PVBUGRz/EBjcsSFszE4oR8Sldm2d36cygyHFWsQscgAwwkpOvuaKoBjxVsrH/E1HCw==

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