Evidence row 547787

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://pennydatahq.com/api/carbon/:postcode"
    ]
  ],
  "name": "GB Carbon Intensity",
  "owner_address": "0xd0a3c0f5612ecd88e4b16ef1cd458e1a5e8ffd49",
  "raw": {
    "accepts": [
      {
        "amount": "2000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xd0A3c0f5612EcD88e4b16Ef1cD458e1a5E8FFD49",
        "scheme": "exact"
      }
    ],
    "description": "Forecast carbon intensity of Great Britain electricity for the current half hour in the region of a postcode, with the generation mix, as JSON.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "pathParams": {
              "postcode": ":postcode"
            },
            "queryParams": {},
            "type": "http"
          },
          "output": {
            "example": {
              "dno_region": "SSE South",
              "from": "2026-10-27T14:00Z",
              "generation_mix": {
                "biomass": 5.2,
                "coal": 0,
                "gas": 20,
                "hydro": 0,
                "imports": 3.1,
                "nuclear": 9.2,
                "other": 0,
                "solar": 20,
                "wind": 42.5
              },
              "intensity_gco2_per_kwh": 85,
              "intensity_index": "low",
              "postcode": "RG10",
              "region": "South England",
              "to": "2026-10-27T14:30Z"
            },
            "type": "json"
          }
        },
        "routeTemplate": "/api/carbon/:postcode",
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "pathParams": {
                  "properties": {
                    "postcode": {
                      "description": "Great Britain postcode or outward code (the first half, such as RG10), with or without the space, any case. Northern Ireland (BT) is not on the GB grid and is not supported.",
                      "type": "string"
                    }
                  },
                  "required": [
                    "postcode"
                  ],
                  "type": "object"
                },
                "queryParams": {
                  "properties": {},
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "dno_region": {
                      "description": "Distribution network operator area",
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "from": {
                      "description": "Start of the half hour, ISO 8601 UTC",
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "generation_mix": {
                      "additionalProperties": {
                        "type": "number"
                      },
                      "description": "Percent by fuel",
                      "type": "object"
                    },
                    "intensity_gco2_per_kwh": {
                      "description": "Regional forecast",
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "intensity_index": {
                      "description": "very low, low, moderate, high or very high",
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "postcode": {
                      "description": "Outward code",
                      "type": "string"
                    },
                    "region": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "to": {
                      "description": "End of the half hour, ISO 8601 UTC",
                      "type": [
                        "string",
                        "null"
                      ]
                    }
                  },
                  "required": [
                    "postcode"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-27T14:41:00.453Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-27T14:41:00.185Z"
    },
    "resource": "https://pennydatahq.com/api/carbon/:postcode",
    "serviceName": "GB Carbon Intensity",
    "tags": [
      "carbon-intensity",
      "electricity",
      "energy",
      "esg",
      "uk"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Forecast carbon intensity of Great Britain electricity for the current half hour in the region of a postcode, with the generation mix, as JSON."
}

What the leaf hashes

{"body":"352fab4d0a5203b603e5cfad4ec252c1d955a4200e76f947e2d1d66ad6dea1b7","id":547787,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793133215512729,"prev":null,"subject":"x402_bazaar:https://pennydatahq.com/api/carbon/:postcode","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0xe324ac54f9a2dce328d2679b0b5ac0f03e36a8e15f837a6b2b5abcd05c00101f
2. 0xf40a379750286fdc0375ee4f08277d9d28d32ed73859d00035a4b7dc26141c3d
3. 0x87fd729962a1435394040b87c854e2b89674428ee3e4b1c5ebfbe12db8297636
4. 0xd41f32115d5c4b4b96d23b88cceeb811da73d8a112b59b9ba05a0d51c9f5614b
5. 0x96ab16bbcce203b46a422ff2f34966b9e60f13eac571183b5af4a546960f8897
6. 0x700e371bb950c77c0ae823a9cbb5cc4d62ef4b3dac543e74e6e8d4c33114b0c7
7. 0x8bcf8f407f87e79b3e44b349c7f8f65b2a732fa1cc10a255f564d8ee9c0aa403
8. 0xcf1f421e1924be2bc5f4e29837bb2ebe70e0b8e9bd77f2ac333e1521a545d9fa
9. 0x19824223ee11ddb016efd2e327ed643b913aa224363800e37b517eebd94adff4
10. 0x9dd5b513b09ea681169c98daa1974e29a8c41be70e08e7d4aeba42ed6a336da7
11. 0x34f3c48e71e3a51d90a85a367f52d52a7bd33af28aa5a0369e154bffa6a38243
12. 0x46ff3840378aba3ab5311ff9a58e7269ceff45cbef540c18a2bad9af3d6127bb
13. 0xd98ea318b514153f74841c90aff18a807e61314ec99610bf3bdbb7219da01cbd
14. 0xf72dee7a0c7534cb19ede4959b957b00c0a8285c36ad49dd2ce1c1092bf60d93
15. 0x24e3e2bb8ee1e8d20756de35f0e0c4ec8eb1f193bd2cf3f077ee1f92f211c34d
16. 0x8745bd887f5ce9f7a49558fd2b04cdcd97a05ea9f8a23f62d0e80cb13d328b0f
17. 0xdf1105afdc109de3c09a98fc8a3864159ad964e6f49b635c105a27a1e1f14310
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4