delphi.consensus.snapshot
Appended 10 Sept 2026, 05:30 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 - 1650
- entry_
type delphi.consensus.snapshot- entity_
type forecast_question - entity_
id 3707c33d-0301-4c72-8c13-ee685e8a0a88- logged_
at 2026-09-10T05:30:41.013493+00:00- previous_
hash 022b0606153684f138546963ee02fd5e69e3d04531ae85ecfb291b83dedc7887- payload_
hash 804096aa2adac36e30d04ebdc0966d6184b84e4a75e33f9cbdec899b5b9ca085- entry_
hash 791a67279c6c128f12e01deb0453b7faf4c519570d3d81b7e3b2692c47342f70
sourceGET /api/transparency/entries/{n}· one entry, as served to this reader· payload served
Payload
{
"timebase": {
"clock": "REAL_UTC"
},
"computed_at": "2026-09-10T05:30:41.009359Z",
"populations": [
"DELPHI_AGENT",
"EXTERNAL_AGENT",
"HUMAN",
"NETWORK",
"VERIFIED_EXPERT"
],
"question_id": "3707c33d-0301-4c72-8c13-ee685e8a0a88",
"series_commitment": "9f5ec9133e628a7aa8b5d8a478bdb279b26dcbc43ad77c670ea448393060400c",
"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
69b819577876d4eb7c2e58a68894ea63c2a139be2ee9ee2a495e43f12ea8b388- 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 - 1650
- tree_
size - 2239
- leaf_
hash 81b49ac31f998b6cd12d52344e461e779932066dcaf3007780624adbfa41dbd2- audit_
path (12) 0: 2db3a1dfadd9a39a96844c8a1f10dec9af736b533492e8db2946e215c7b558a51: c7164c94dea740161d517825e590da5d7b291e699792c77a9e09464283c2d25c2: 826e6bab675eb5b97b1dc3140e609282c3947b83cc087d3002cc2ae4fd6c86203: 5fa484a0fc2acc1d3a864f3a4ff30f37014723dd710355f60cadafa942770bc04: 3e3b5e32b4d43ed48e4b662c8baf5aa348a5a0701fb48ccec5fa81ff8dd1d49a5: 68134fb504110907cd6ea503e3b9ad00d7f4eeee8e5c017e134a0023f49e1d2b6: 00d36260786b8ce290bee853db49e73fdd5d2800eb992fa1e6e2b98e2e9d62487: f4a858c5afd6d2bbfe79825cc00005d2e5bc4cb6a3723b70509ff06cb4f713008: 49fbc719d10777c21e02e255a1174dbc47e89c67c7b327c5f50e8ea1ffbb5bad9: 5fb1ed5f5a35e845232517268bf48c5384c29f290dd198d1d6f802756a73a76d10: 9cc5fac487aa9ec1c73baef673025a398e2ca2721a82dbc4c270eb2473aaf7be11: 9203a1600de814d3afb819f841569332c7e3b58c4d0e0ea56c377729f25dca49- root_
hash 03dd6fb33b4bd65222257eec0069956926795f14f7354795bcb42af5fe51ba08
The earliest published head that covers this entry
- tree_
size - 1669
- signed at
- 10 Sept 2026, 05:30 UTC
- key_
id 042b55492fabadcb8ffb9fe4e9b6a3e8- root_
hash 523070ab7c9144911686b260582d7847bb9af7cd001319dcd81f849fddf5ca28- signature
tlF26vhUzkZ1g6+zQtD/Vl7F+8URBvYLFh6zLzoV9MBBJJwMGhXJhrE3GhWFFjxrBmxlZH/66rXkfK9tIDB4Dw==
sourceGET /api/transparency/proof/inclusion· leaf_hash, audit_path, root_hash· audit-path nodes: 12