sequence 1,992

delphi.consensus.snapshot

Appended 20 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.

← 1991 1993 →

The entry

entry_hash4967a928fb5eREAL_UTC

sequence_number: 1992
entry_type: delphi.consensus.snapshot
entity_type: forecast_question
entity_id: cd22f6a9-1eb7-4927-a2e9-6736a77b75cc
logged_at: 2026-09-20T05:31:21.003854+00:00
previous_hash: ac4712eb0e508bfffd9c5e03425433ef782470dd2be11302ecb9ab51a4a86164
payload_hash: 315e53ac44795a2e54621e7f59f50886569ec6ec8812e178f05d39e9d1d42495
entry_hash: 4967a928fb5edd58df89dcef62cfbc25bd9b274818cbfc3fc04feb4697cc5a3c

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

Payload

{
  "timebase": {
    "clock": "REAL_UTC"
  },
  "computed_at": "2026-09-20T05:31:20.997939Z",
  "populations": [
    "DELPHI_AGENT",
    "EXTERNAL_AGENT",
    "HUMAN",
    "NETWORK",
    "VERIFIED_EXPERT"
  ],
  "question_id": "cd22f6a9-1eb7-4927-a2e9-6736a77b75cc",
  "series_commitment": "c6be6a3f718680300c3c0b7fdc6e69070e9086f7294a64b51f1f9c83e2bd78e8",
  "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: 0f5a5fc1ca89cbd131b714e9650f4d21acacea016a0758108f57e9dea355b9fe
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: 1992
tree_size: 2479
leaf_hash: 71d9f6f315d16ad512a929a5d11a2ae267b6cd30a4c9ffc8a19f5516ef37dfad
audit_path (12): 0: 29890caddd6e031a58473995ea652bf66c6d1d87f64673558bb679bda81da8111: 0043aff63c3addaf30388330a4ac8324f0c5261d2bd098da4138529e74024f092: 08ce321bd625303eeabe6db631b66f753b926f3f6f26cb7c49b96c6d959c647e3: 98e98cb2e99e90a10792886412c376d983058e52333234e7e071243c68afeb474: 0660e870df08b3e5f265fe28da6fd51268d00673b6dbcff1999891e134500c085: a50e0e977ad9842f45f35f6e8d03b29bd4c453b61b361ba211d57763c2a168e96: c321285e45ea8a57cf869ad4aefceaa5840e364ae5f182e7b0c7b58aab9054be7: 8018b7deda34c522f2ac360ffdd9cc85624549e7457ea594e86a7f04e9a264aa8: 5ab1df6751f0dac25a6ce29d97587d6e08dcdd2d94987223ead725483527e08e9: 5fb1ed5f5a35e845232517268bf48c5384c29f290dd198d1d6f802756a73a76d10: 9cc5fac487aa9ec1c73baef673025a398e2ca2721a82dbc4c270eb2473aaf7be11: 8d949d6aef53b2e3322ef5e232755263eaea63b886b405d936c87ac0c842b6a1
root_hash: 2135d33fc3b42de9408df8505e145fcd175142e943af391ea41c56bc99a1e5e2

The earliest published head that covers this entry

tree_size: 2005
signed at: 20 Sept 2026, 05:31 UTC
key_id: 042b55492fabadcb8ffb9fe4e9b6a3e8
root_hash: 60e3cd283b73840cd440288cca33b52ceafee6c202d421678a412f3c5ee05946
signature: cd67hFwY1ta97P30k//m20Gy5B+NCvWm0//2kBrcp9vTc1CKExyU43VM3CfB7s59bHxcLHAWq/omhe+LeHwvDQ==

sourceGET /api/transparency/proof/inclusion· leaf_hash, audit_path, root_hash· audit-path nodes: 12