delphi.consensus.snapshot
Appended 19 Aug 2026, 20:25 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.
The entry
- sequence_
number - 358
- entry_
type delphi.consensus.snapshot- entity_
type forecast_question - entity_
id eb8beb52-14b3-4956-b29e-909a936abbc4- logged_
at 2026-08-19T20:25:53.697889+00:00- previous_
hash fde0e4a123e08b89fa83be3bcbfe9f9ed19f95435e2810ad30324f5a96f39c06- payload_
hash cfc01f8a1c5adcab98f8002232ea8cf1f62d992f390ebb34b0c3b0236b5f3b61- entry_
hash 7cca30228ab72671dc180a23b4b1f9d15d1b7797e1e3448a3db59cce24960272
sourceGET /api/transparency/entries/{n}· one entry, as served to this reader· payload served
Payload
{
"timebase": {
"clock": "REAL_UTC"
},
"computed_at": "2026-08-19T20:25:53.695503Z",
"populations": [
"DELPHI_AGENT",
"EXTERNAL_AGENT",
"HUMAN",
"NETWORK",
"VERIFIED_EXPERT"
],
"question_id": "eb8beb52-14b3-4956-b29e-909a936abbc4",
"series_commitment": "9d8ea63df67b162eb6f997e7f3669e5fff83eb8134ce6cf48ca5a218f5676aed",
"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
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
d650f27c550c88abfa6e92dccdbbdb3848aaaf34d0753ee49ca71309a06134a8- 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
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 - 358
- tree_
size - 2341
- leaf_
hash e30bb2a0b5de708ec41b21428ef057e38ce7ec4cbb35b7dc8faa97743a8b0a12- audit_
path (12) 0: a76c7f7e8e48554952d0d7d7f9345798d7df88b20f1b645924664ab26fcb2eb01: 5e307d3f51259fbe1cde8680559d36d1410a9e61c1f9203d836503d95444e0352: 76e5890693b567f316c794d9f7ee04420052b0f012a9783279606f7db30096293: 577e146fd59a527ad4c814ae5a2c69f780bc933856790cc65b82bdd386f9a0b14: 5017bed2539c89027a362051b3f615ec6a6b5c4d6636a5c0dc982357d57262d35: 2595355eed4d48ec0c80ac31f76e58b5020ff9a705ae14cb94e2e491fcaf2c3a6: 4e2b3509b8ca9f9d4bd60d1a8236d9ff586b63b2e0bf7572cd8261d81af879617: 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