Evidence row 116728

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://material.halowerk.com/copper-co2"
    ]
  ],
  "name": "copper_recycling_co2",
  "owner_address": "0x2880edfff13100677bf97a3cbdf3bc34771c4e5e",
  "raw": {
    "accepts": [
      {
        "amount": "2000",
        "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": "Multiplies the copper quantity by literature emission factors for the chosen secondary route and for primary cathode production, and reports the difference as low, typical and high. The factors are published life cycle averages and are stated in the response; they are not a certified product carbon footprint and are not a valid basis for a carbon credit, a customer declaration or an audited claim.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "bodyType": "json",
            "exampleUrl": "https://material.halowerk.com/copper-co2/schema#/requestExample",
            "method": "POST",
            "schemaUrl": "https://material.halowerk.com/copper-co2/schema#/inputSchema",
            "type": "http"
          },
          "output": {
            "example": {
              "copper_kg": 0.01,
              "factors_used_kg_co2e_per_kg": {
                "overridden": {
                  "primary": false,
                  "secondary": false
                },
                "primary": {
                  "high": 5.5,
                  "low": 3,
                  "typical": 4
                },
                "secondary": {
                  "high": 1.8,
                  "low": 0.7,
                  "typical": 1.1
                }
              },
              "limits": [
                "Literature life cycle averages, not a certified product carbon footprint.",
                "Not valid as a carbon credit, customer declaration or audited claim.",
                "Ore grade, electricity mix and process route drive the spread; use own verified factors where available."
              ],
              "method": "quantity x factor difference between primary cathode and the selected secondary route",
              "primary_emissions_kg_co2e": {
                "high": 0.06,
                "low": 0.03,
                "typical": 0.04
              },
              "route": "secondary_refined",
              "route_name": "Secondary copper, refined from mixed scrap",
              "saving_kg_co2e": {
                "high": 0.05,
                "low": 0.01,
                "typical": 0.03
              },
              "saving_percent_typical": 72.5,
              "secondary_emissions_kg_co2e": {
                "high": 0.02,
                "low": 0.01,
                "typical": 0.01
              },
              "transport_emissions_kg_co2e": null,
              "unavailable_fields": [
                "transport_emissions_kg_co2e"
              ]
            },
            "exampleUrl": "https://material.halowerk.com/copper-co2/schema#/outputExample",
            "schemaUrl": "https://material.halowerk.com/copper-co2/schema#/outputSchema",
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "additionalProperties": true,
          "properties": {
            "input": {
              "additionalProperties": true,
              "properties": {
                "bodyType": {
                  "const": "json"
                },
                "exampleUrl": {
                  "format": "uri",
                  "type": "string"
                },
                "method": {
                  "const": "POST"
                },
                "schemaUrl": {
                  "format": "uri",
                  "type": "string"
                },
                "type": {
                  "const": "http"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType"
              ],
              "type": "object"
            },
            "output": {
              "additionalProperties": true,
              "properties": {
                "exampleUrl": {
                  "format": "uri",
                  "type": "string"
                },
                "schemaUrl": {
                  "format": "uri",
                  "type": "string"
                },
                "type": {
                  "const": "json"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-25T18:53:31.67Z",
    "quality": {
      "l30DaysTotalCalls": 6,
      "l30DaysUniquePayers": 5,
      "lastCalledAt": "2026-10-25T18:53:31.254Z"
    },
    "resource": "https://material.halowerk.com/copper-co2",
    "serviceName": "copper_recycling_co2",
    "tags": [
      "recycling",
      "copper",
      "emissions"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Multiplies the copper quantity by literature emission factors for the chosen secondary route and for primary cathode production, and reports the difference as low, typical and high. The factors are published life cycle averages and are stated in the response; they are not a certified product carbon footprint and are not a valid basis for a carbon credit, a customer declaration or an audited claim."
}

What the leaf hashes

{"body":"b3cb2ea411a09ca1960ed226898044ec6b6aa0b4f8cc5531b083b0529e5b6630","id":116728,"kind":"listing","method":"baseline/1","observed_us":1793025610212135,"prev":null,"subject":"x402_bazaar:https://material.halowerk.com/copper-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).

1. 0xd59d55893f162b16edf5c7aa7a44a6f23bc66efea97ed7fb58d08e9e77d9fb21
2. 0x0961583925b867371dfcf4b8ccdbe6f8a0e0b71e3e93980031d072920c89c22a
3. 0xc67f7bb6c5f90ab251ffc540b7fe4653016af8699b64445d816520fae0e83000
4. 0x5f19242f0add88cab1a6a41434517df774acd8a73875eaaecb2f74f479ed3900
5. 0xbdc26b82a4b3e1a69704fd0f1589e977c9e842c4bfa1b4a1bdfd8137d109ff6e
6. 0xaf8f7a87d2114598408490200fea1c8a7e9da471a0a46b53e3234569a22c1e0d
7. 0x58bc0a8f6c2c02698258137872a51b5419d6c135a284c5cfd25c8c09029a03f9
8. 0xb23d4f81a215ce490d2b59883961cd0c5cfea84bf0f03d37c2baa6b953a9319b
9. 0x36642cde68b45669a292ab7ae6de5295af67582746f1e9a6f3a4c36d13663016
10. 0x90db080e84cc49e02327fe570e893ec90666ec445e285fba4414255e78f59735
11. 0xb662623cf3d981ba2c8b763c6eb8f856021264a195ee47844bfa430e2ef3597f
12. 0x7026808261896a203198354548e5e8cabce4a06e89d077c172084841b47ae119
13. 0x3199db04c2c73c3483386a86bf503eafde5af103465608156e2e5f42e72a6fbe
14. 0x6b927d53caa5125cdba9255612d524976c691f8672796c3f0885ba2c5b3af1ad
15. 0x6dc40f983a3840a0ad927a9ca17f4ff1e3b649a6c735e2a09b140db7c2caf13b
16. 0x703f95866af09c5e5d6ead7411e9a10f964a41a2aff64d4a55ff0053c023a023
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae