sequence 2,278

delphi.consensus.snapshot

Appended 1 Oct 2026, 05:32 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.

← 2277 2279 →

The entry

entry_hashf33727f0d0c2REAL_UTC

sequence_number: 2278
entry_type: delphi.consensus.snapshot
entity_type: forecast_question
entity_id: a8c36f16-c0df-49f5-92d5-29bb1d0e58a9
logged_at: 2026-10-01T05:32:02.956392+00:00
previous_hash: d77896b7cfeae3795e56005b3edabda0c2407372762c1d22182224ba22743a40
payload_hash: ab9770a7276502934d82653d8c4f99b89d1f3d47e7c27b78a43db80dd92e59c2
entry_hash: f33727f0d0c285e195ff0480b20c6761e0be4dd54a6a67f9396a05587d12e8b0

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

Payload

{
  "timebase": {
    "clock": "REAL_UTC"
  },
  "computed_at": "2026-10-01T05:32:02.909268Z",
  "populations": [
    "DELPHI_AGENT",
    "EXTERNAL_AGENT",
    "HUMAN",
    "NETWORK",
    "VERIFIED_EXPERT"
  ],
  "question_id": "a8c36f16-c0df-49f5-92d5-29bb1d0e58a9",
  "series_commitment": "885b6f453e34fb683ef099b05f338fabdcdb504d4b83fa9bdeaa67700b1bcc83",
  "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: 951a01de5aa15b47209231d1af95ef4ac25459d979f7dd36a397744f82c8d840
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: 2278
tree_size: 2479
leaf_hash: 774a82d5327997233151836c1ec9245ae3da42395d0748f7c990e59f205bdb4f
audit_path (10): 0: 47ef40eef6738ca8dbd06fb40d9dacf129aaf813083c311f1c02d59872420f0c1: 1505853e8c78a4670dc0bf0cf74d663a265e1e2e1d33f943e436cb5faadf03b92: 9f47046bbc5697bc4d2b2d956eac2bb5b9e206111548a99c17545ccfef241a453: e8a87685ffc0c045844f48048e15e73d87bc3b0e8f22683bd6dc45e7883291754: 17915314b26d6769039107000ee4044a98d3c61a06eb7fa7121566ca8a4107f35: 453a26486f28dbe1e75e2f01f0d5e9fd3fe713113fe66b00eb5763b442ca537c6: cbc4db984571c13242d6f4b551c8d58b2ac60b14ae1df2945b6a2428d447c0bb7: 126596474757e47b31a2f4c9d89412108fada5bcdc7a19a9a1de3d4012be0b578: fc41f233aac25cd7d868667ffe62e2d6bc79ebfa41e20ba3937ba4144f68af369: c2a61f9c340fe90eca96b6ee3ce7a915f3c652848ec632eaa3e641ee4f30439d
root_hash: 2135d33fc3b42de9408df8505e145fcd175142e943af391ea41c56bc99a1e5e2

The earliest published head that covers this entry

tree_size: 2285
signed at: 1 Oct 2026, 05:32 UTC
key_id: 042b55492fabadcb8ffb9fe4e9b6a3e8
root_hash: 17330c6327e6363b8237bd4a68d5ee420a6d0f745c8d8bab0a90305d6bccba50
signature: TlvQ+bw63yzvEDWcOD5MbBx7k0BSImf5PEym3jf4RkUEAcxz9SLwuoK5KlbtkboyqggWJf91cbdWSuZ+NP3aCQ==

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