delphi.consensus.snapshot
Appended 27 Aug 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.
The entry
- sequence_
number - 926
- entry_
type delphi.consensus.snapshot- entity_
type forecast_question - entity_
id fc61e6d4-5001-4db0-95d4-be60a131bd47- logged_
at 2026-08-27T05:31:41.610937+00:00- previous_
hash c9a7bc738b36429d3672b2d9fdce9338e0fbddb3c195055eabe9a0acc762d06c- payload_
hash 352ea39a9ee9bcacf5f739c708d90651e63a0171dce8b75aaf07ca63360f3aa3- entry_
hash d96346527c837f9aef4be243b97b272ecc5f8cd0eab827043cf3c0c4b7d6f5fa
sourceGET /api/transparency/entries/{n}· one entry, as served to this reader· payload served
Payload
{
"timebase": {
"clock": "REAL_UTC"
},
"computed_at": "2026-08-27T05:31:41.607488Z",
"populations": [
"DELPHI_AGENT",
"EXTERNAL_AGENT",
"HUMAN",
"NETWORK",
"VERIFIED_EXPERT"
],
"question_id": "fc61e6d4-5001-4db0-95d4-be60a131bd47",
"series_commitment": "0341bb49e2b41cb489f9a6bd09f05c938ecd888e464334fbcab0fee369bd7103",
"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
27e57d53cf521f18a4c770eccff903739cf646e95e7c71b9d6d51c343608e897- 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 - 926
- tree_
size - 2239
- leaf_
hash c28d800a5ca281ab849ebf33c0879253d3d139aa9fe9bd5e7296148d1a69ec9d- audit_
path (12) 0: 1ae9e88893ccc8075d559a3c2cf61076af5cb548523fa4179c3f316e48457df81: 2d8596a63b7921d9a564093f00d2fc4a181583b1d765cc4639cbb2e9468d97622: a42c269ed87e3aa8f405310b538bb888f107b0fe5f91666f1e35c9db1642070a3: 2bdaa1a51ce1993395f846a80fbfdf0ab69533ff17e4b240dc953b208f1605254: de56fbc4af91f856b64481e0d71aeaade8792bcbcf18d89b9d8a18cced0d58ea5: 99bff9bbae4f32bf8db82e931bb3407e647ddb95798066fdf9855c6f9ef036ce6: 0b2df4116ce96d4c1fa68d027745d1dc76550ebc49d5cb7aa6fcb4e26ccf8f8d7: 9f20cfd56c132d1d00fe76cb2e482a3a9b4fbe96bc0d292d29ba8016ce161e9d8: 184a24c3b623669a5fc418f1a01a448ab12c5b650e771370beaf16f761dd2e6c9: e5a5c76fa4bfc3f31f74c026263990b303ea76d2ec828987b307239036c908ac10: 86666e2cb262024eb1c2584c671184dc2fb8b8d41a345bde94ca518e487ac23911: 9203a1600de814d3afb819f841569332c7e3b58c4d0e0ea56c377729f25dca49- root_
hash 03dd6fb33b4bd65222257eec0069956926795f14f7354795bcb42af5fe51ba08
The earliest published head that covers this entry
- tree_
size - 953
- signed at
- 27 Aug 2026, 05:31 UTC
- key_
id 042b55492fabadcb8ffb9fe4e9b6a3e8- root_
hash 777b84e80ce59d38be10789755416a4f30978c344b4fac71e55a1730db98b7a2- signature
RuM+HDdwLwkwChNgs5UCcJZC9MkAJ3Wm0H42BkAdbOcleJjXbre134gogmmC+Veo5jcMHalx4/2FVClJdH0ADg==
sourceGET /api/transparency/proof/inclusion· leaf_hash, audit_path, root_hash· audit-path nodes: 12