Evidence row 76974

Observed 26 Oct 2026, 14:38 UTC, by baseline/1.

Kind: listing
About: source_record x402_bazaar:https://klima.halowerk.com/v1/heating-co2
Recorded: 26 Oct 2026, 14:38 UTC
Previous row: None: the first of its kind about this subject
Body SHA-256: 0383ef7a7d0bee7bd78fdb525599bb86e1623380201b3062ee9387bb8ccfd4e9
Leaf: 0x983ada792555fbc456f2b428d7165c99da0615dad7c1e8070bd9e9e48a3b6bf9

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://klima.halowerk.com/v1/heating-co2"
    ]
  ],
  "name": "klima.halowerk.com/v1/heating-co2",
  "owner_address": "0x2880edfff13100677bf97a3cbdf3bc34771c4e5e",
  "raw": {
    "accepts": [
      {
        "amount": "4000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "currency": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "asset": "USDC",
          "assetTransferMethod": "eip3009",
          "eip712Domain": {
            "chainId": 8453,
            "name": "USD Coin",
            "verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
            "version": "2"
          },
          "name": "USD Coin",
          "network_name": "Base Mainnet",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
        "recipient": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
        "scheme": "exact"
      }
    ],
    "description": "Calculates heating emissions from energy and a published heat factor. Missing facts are returned as null and named in unavailable_fields where applicable. Derived values disclose their method; source-backed values disclose source, time window and age. This is neither legal advice nor customs advice.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "energy_kwh": 5000,
              "factor_kgco2e_per_kwh": 0.2,
              "heat_source": "district heating",
              "source": {
                "published_at": "2026-06-10T00:00:00Z",
                "title": "UK 2026 conversion factors",
                "url": "https://www.gov.uk/government/publications/greenhouse-gas-reporting-conversion-factors-2026"
              }
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "additionalProperties": false,
                  "properties": {
                    "energy_kwh": {
                      "description": "",
                      "maximum": 1000000000000,
                      "minimum": 0,
                      "type": "number"
                    },
                    "factor_kgco2e_per_kwh": {
                      "description": "",
                      "maximum": 1000000000000,
                      "minimum": 0,
                      "type": "number"
                    },
                    "heat_source": {
                      "description": "",
                      "maxLength": 512,
                      "minLength": 1,
                      "type": "string"
                    },
                    "source": {
                      "additionalProperties": false,
                      "properties": {
                        "published_at": {
                          "format": "date-time",
                          "type": "string"
                        },
                        "title": {
                          "description": "",
                          "maxLength": 300,
                          "minLength": 3,
                          "type": "string"
                        },
                        "url": {
                          "format": "uri",
                          "type": "string"
                        }
                      },
                      "required": [
                        "url",
                        "published_at",
                        "title"
                      ],
                      "type": "object"
                    }
                  },
                  "required": [
                    "energy_kwh",
                    "factor_kgco2e_per_kwh",
                    "heat_source",
                    "source"
                  ],
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST",
                    "PUT",
                    "PATCH"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-23T02:02:25.865Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-23T02:02:25.447Z"
    },
    "resource": "https://klima.halowerk.com/v1/heating-co2",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Calculates heating emissions from energy and a published heat factor. Missing facts are returned as null and named in unavailable_fields where applicable. Derived values disclose their method; source-backed values disclose source, time window and age. This is neither legal advice nor customs advice."
}

What the leaf hashes

{"body":"0383ef7a7d0bee7bd78fdb525599bb86e1623380201b3062ee9387bb8ccfd4e9","id":76974,"kind":"listing","method":"baseline/1","observed_us":1793025493194227,"prev":null,"subject":"x402_bazaar:https://klima.halowerk.com/v1/heating-co2","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).

0x983aef404e73c9b6bdac07733c66848f3ab842a6f61367aaf96b0853c3d15fab
0x5ece49b89c3b1e70ecb9607e4291c5d2dbae13bc66fa4a2fc70f05bcbe623100
0xef0ffefc4458c9093d5bfd27430598c99032d1eb8b4524b62fb09d61c098dcb2
0x16f70325cadabe751475f5312f973cdb4c9290eb0eb58daad94f4ba417ae4dd4
0xcf90f7ede897b89de8c08d6a5aeb5cc2b53a32dac27b0cc8bdbe123638034dfd
0xde03f08549016b1929cb53caada0b2ccd4f7d23f5ff1330fa3790aa999a276ab
0x100d5216a00b76a6031dd14533b21828a9009c8d25d9c73d6d78c8c6d221bf72
0x3756c5e8966ecf0cfda8db62de40217c768d1e74b63c0e92f322fdc851818ccf
0xed85265c32db23134a8dd906de16c3913576f79ef1876c4390c434e31018001d
0x62dba386f50cb8efacb93dad4cf930ac3e24a2aa9dd76d9a72cb57081301531b
0xdc8fbefd31fb9903d70279fafdb3f8c1ade2281bea30bd73cec515e9ff4113ed
0x6ae9e6ee1b544d831982666bd3570457659e78fc0064894d7ec23f971a37ff2f
0x239fd39716710e7412bd120c373072b4c0d8b11bb9ee431dad62a2ce57b3d6f4
0x49062da782c4f73855ddd5fdd51840749f928b5f17d1ce75ac50f2d829104e72
0xf0bd63870f0bb378fa300bd33563050dcb7b3e02b44eb3ee550c1c534ec4b246
0x1ac20d30773e1f4f2f811540e9a99b5cca9177c9e2e029acc0d80cf3f1d11f0f
0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

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

How to check it · This row as JSON