Evidence row 68084

Observed 26 Oct 2026, 14:37 UTC, by baseline/1.

Kind: listing
About: source_record x402_bazaar:https://api.polls.karbach.digital/v1/federal/trend
Recorded: 26 Oct 2026, 14:37 UTC
Previous row: None: the first of its kind about this subject
Body SHA-256: e6b3efc4cb377bb6cde225e06e5d4ac15dcd9952f4d8eb59708b52e80127c93a
Leaf: 0xc9cbf9a0f7e8d18d5b41f45d5a5117fccc8bf0b3e6d99158889eed131271bd14

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://api.polls.karbach.digital/v1/federal/trend"
    ]
  ],
  "name": "polls.karbach.digital",
  "owner_address": "0x6d8444caed95d9155785da10ac00247948957d61",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x6d8444CaEd95D9155785Da10aC00247948957D61",
        "scheme": "exact"
      }
    ],
    "description": "Federal polling average today per party with 95 percent band (Bundestag). Use when asked how German parties currently stand nationally. Source-attributed, German data, updated every six hours.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "type": "http"
          },
          "output": {
            "example": {
              "data": {
                "election": "btw-2029",
                "parties": [
                  {
                    "ci95": [
                      19.8,
                      40.4
                    ],
                    "entry_probability": 100,
                    "median": 28.5,
                    "name": "AfD",
                    "party": "AfD",
                    "poll_average": 28.5
                  },
                  {
                    "ci95": [
                      11,
                      30.9
                    ],
                    "entry_probability": 100,
                    "median": 18.8,
                    "name": "Union (CDU/CSU)",
                    "party": "CDU/CSU",
                    "poll_average": 18.8
                  }
                ]
              },
              "docs": "https://api.polls.karbach.digital/v1/",
              "model": {
                "point_estimate": "weighted_poll_avg (Fenster 5, temporal_decay_14d + institute_quality)",
                "polls_used": 5,
                "simulations": 10000,
                "version": "4.16"
              },
              "notice": "Scenario analysis based on published opinion polls. Not a prediction and not a voting recommendation. Coalitions are arithmetic majorities only, not statemen...",
              "project": "Ein Projekt von Karbach.Digital (https://karbach.digital)",
              "source": {
                "polls": "dawum.de",
                "polls_license": "ODbL 1.0",
                "polls_license_url": "https://opendatacommons.org/licenses/odbl/1-0/",
                "processing": "polls.karbach.digital (Max Karbach)"
              },
              "uncertainty": "ci95: range that contains the result with 95 percent probability in the simulation. Out of sample in 2026 the band held 17 of 21 values (81 percent).",
              "updated_at": "2026-10-18 18:00:10"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {},
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
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              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-19T13:42:04.382Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-19T13:42:03.906Z"
    },
    "resource": "https://api.polls.karbach.digital/v1/federal/trend",
    "serviceName": "polls.karbach.digital",
    "tags": [
      "elections",
      "germany",
      "polls",
      "politics",
      "bundestag"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Federal polling average today per party with 95 percent band (Bundestag). Use when asked how German parties currently stand nationally. Source-attributed, German data, updated every six hours."
}

What the leaf hashes

{"body":"e6b3efc4cb377bb6cde225e06e5d4ac15dcd9952f4d8eb59708b52e80127c93a","id":68084,"kind":"listing","method":"baseline/1","observed_us":1793025466160633,"prev":null,"subject":"x402_bazaar:https://api.polls.karbach.digital/v1/federal/trend","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

0xc9cbfca157d11d5f486383e6c6eb2c20b8c8d04cd5aaac2c74b0c08abb383f05
0xf48b6c82294d6c11ce3cc3df4b52d05c1f3ce84a3e6137bf4b349301443ffe6c
0x6317285bc58e81b56f98fc534e17949825426f8b8732324c52e34a0e1c96277f
0x0fc2ac9844667eb163bfa7a0653f3c7c107cd990a281769c21c6c42768933db7
0x3fcab7a1f2002a7aba6644369f3355a9ac18abee19e308f914908eb23f710022
0xfe83087e996701c7952443f34d310b9909ef7a8a39683056d282cd38cffadba0
0x6d6cc408d7d3d91da513d4d882ceed8c82f61632dc6614f5659e43ccb2777f03
0xcbf246dd29448c433d63e0879498fd6345d6abdb90ff389ab58a1f75a6ae58cf
0x7defb96cd7c4f1f4cdc1d33dbed6775edfd6f1d3f3dcd10f8601f08a2c66e41b
0xff8a61dc0d7a2ad53748c909044ecbbf5355b001e1be01dd836899cb83511970
0x60eabf7e1a3db5892c30621c19c096fd56eb4ad1f2ace810471d00503c868d2b
0x02a11c0460d1a42b6246e1c715f0c3098d82c39154a56e918e2c22b56ca2c978
0x985acd37cc044d5aa6ad959194da8e91c81045df83517891ed92f1763a9ab825
0x5b20d8aab05225a3497eadcce89d2e2a586a510fb31334793d3f46f88f0157c5
0xe94ca5b798e9899ad611e57835af42266e20f53f44977e487d81365e30972beb
0x703f95866af09c5e5d6ead7411e9a10f964a41a2aff64d4a55ff0053c023a023
0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root: 0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
Chained: 0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
Published: On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae

How to check it · This row as JSON