sequence 271

delphi.consensus.snapshot

Appended 17 Aug 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.

← 270 272 →

The entry

entry_hash4c904d413b95REAL_UTC

sequence_number: 271
entry_type: delphi.consensus.snapshot
entity_type: forecast_question
entity_id: b6f50ed5-05a7-40ca-90e0-588fcc89df0b
logged_at: 2026-08-17T05:32:22.521189+00:00
previous_hash: f30480acfdf2a13d6e882da865c0a912970d2800cc10e1ffca7de3af1a1f477d
payload_hash: 08c994eeaa0151ee3419e3c332365cde2d09707d9d05815b840e79d9c6fbe7bd
entry_hash: 4c904d413b95e2e75e965d76625cb05f772c3b02ffb5ecf2620a4725802f401e

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

Payload

{
  "timebase": {
    "clock": "REAL_UTC"
  },
  "computed_at": "2026-08-17T05:32:22.518007Z",
  "populations": [
    "DELPHI_AGENT",
    "EXTERNAL_AGENT",
    "HUMAN",
    "NETWORK",
    "VERIFIED_EXPERT"
  ],
  "question_id": "b6f50ed5-05a7-40ca-90e0-588fcc89df0b",
  "series_commitment": "d333ee45e722c5cdb9fd62cdfc1224cc3dbb4c7a2d4ea10ff63882499b36ebca",
  "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: 2ac1d61a46295e4e611cecb19dc683a7e6a14228889baf35a45c52d1a92d8f0c
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: 271
tree_size: 2341
leaf_hash: 0f11650afd007f1cf0cb16232d12b72c8e918e0da83ed54520e4f909b7bc68bc
audit_path (12): 0: 108daf423892105a028d4228d53d1f39c85fc292b6252357c8e9bb9e92a52c701: 96c14cde75b35153f539e1c33b48806c0b00d58e7a649e589d51dc3f14cb1bcb2: 1c5e6dea3254b72ac3e42a44ba51cbccad1f00d0ae892812ec5731f6bf9b1f4b3: fa710e9b98f8842811cec9e46f7bbe191c53aebc42dc7e9519a9cb17bc56386c4: b72aa60f23412fb51abcda53b6fcf69f02631da2699b85803cd382de35469fd75: a42809d126c568e62025f792d0dceaf9cd24a755d024064f710db9f30bff07b06: 9640f2238aad678a6c39ef2afc9894d61a7aa5d18f0e3d98352873acf175f1757: b6b1a03b6c4cb71ca9f74b67d202bb3853e053dac5fde4936e3466bfa6ad09fd8: 895db6b8306be0a0cab88cc38987289ed45422a6223f6a873d831c26678719179: 2fb679aab258481705c982e553094522ea7bb93361711a8387ebf359e8c3e43110: 86666e2cb262024eb1c2584c671184dc2fb8b8d41a345bde94ca518e487ac23911: bd18df2de60e205be411a53ea96887ec76f5a16c15250bf48e3f90dc788abbaf
root_hash: 9f32e37b52a81f4fc0f11a1b956464ef6acde09c58b0ce26dc44277199cb7df0

The earliest published head that covers this entry

tree_size: 374
signed at: 19 Aug 2026, 20:25 UTC
key_id: 042b55492fabadcb8ffb9fe4e9b6a3e8
root_hash: ecf4adc708ae542a0339e03fd4cc181cf49d0329768627c5345c915a58bd813a
signature: 3yL+JZfMhiQ6rm5rCTTg7iT+or04nCGVcQ08ILMw/d7eqvR4Jid7cEg2rQU5fCX7llStjVkTC9jVZjfGQvtMAg==

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