Evidence row 2519

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://grundpreis.halowerk.com/v1/category-unit-prices"
    ],
    [
      "x402",
      "https://grundpreis.halowerk.com/v1/pack-compare"
    ],
    [
      "x402",
      "https://grundpreis.halowerk.com/v1/pack-size"
    ],
    [
      "x402",
      "https://grundpreis.halowerk.com/v1/unit-price"
    ],
    [
      "x402",
      "https://grundpreis.halowerk.com/v1/unit-price/batch"
    ]
  ],
  "name": "grundpreis.halowerk.com",
  "owner_address": null,
  "raw": {
    "caip2_networks": [
      "eip155:8453"
    ],
    "category": "",
    "description": "",
    "domain": "grundpreis.halowerk.com",
    "endpoints": [
      {
        "description": "Distribution of latest included product/store observations, with regular and promotional prices separate. Example: category en:pastas, country DE. Cheapest means cheapest included observations, not the whole market.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "en:butters",
            "group": "body",
            "name": "category",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "DE",
            "group": "body",
            "name": "country",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "2",
          "l30DaysUniquePayers": "2"
        },
        "serviceName": "",
        "tags": [],
        "url": "https://grundpreis.halowerk.com/v1/category-unit-prices"
      },
      {
        "description": "Compare supplied packs within the same mass or volume basis. Example: 500 g at EUR 1.49 versus 1 kg at EUR 2.69. Unknown quantities and incompatible units are marked rather than silently compared.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": [],
            "group": "body",
            "name": "packs",
            "required": false,
            "type": "array"
          }
        ],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "2",
          "l30DaysUniquePayers": "2"
        },
        "serviceName": "",
        "tags": [],
        "url": "https://grundpreis.halowerk.com/v1/pack-compare"
      },
      {
        "description": "Current documented pack quantity for an EAN string from Open Food Facts. Example: ean 4008400401621. Snapshot and data gaps are explicit. This is neither a historical shrinkflation measure nor a retail price.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "4000417025005",
            "group": "body",
            "name": "ean",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "2",
          "l30DaysUniquePayers": "2"
        },
        "serviceName": "",
        "tags": [],
        "url": "https://grundpreis.halowerk.com/v1/pack-size"
      },
      {
        "description": "Calculate price per kg or litre from your price and quantity or an available EAN pack size. Example: price_eur 1.29, quantity 4x125g. This is a calculation, not an observed store quote.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": 2.49,
            "group": "body",
            "name": "price_eur",
            "required": false,
            "type": "number"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "6 x 0,33 l",
            "group": "body",
            "name": "quantity",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "2",
          "l30DaysUniquePayers": "2"
        },
        "serviceName": "",
        "tags": [],
        "url": "https://grundpreis.halowerk.com/v1/unit-price"
      },
      {
        "description": "Calculate kg/l unit prices for up to 50 rows of price_eur plus quantity text or EAN. Example: items [{price_eur:1.29,quantity:\"500 g\"}]. Errors are reported per row; kg and litre groups are not comparable. Empty batches with no usable line are not charged. No observed store offer.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": [],
            "group": "body",
            "name": "items",
            "required": false,
            "type": "array"
          }
        ],
        "pricing": {
          "amount": "0.005",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "2",
          "l30DaysUniquePayers": "2"
        },
        "serviceName": "",
        "tags": [],
        "url": "https://grundpreis.halowerk.com/v1/unit-price/batch"
      }
    ],
    "enriched": false,
    "iconUrl": "",
    "id": "grundpreis-halowerk-com",
    "integrationType": "",
    "isNew": false,
    "name": "grundpreis.halowerk.com",
    "networks": [
      "Base"
    ],
    "priceSummary": {
      "avgCostBasis": "exact",
      "avgCostPerTransaction": "0.0026",
      "currency": "USDC",
      "maxAmount": "0.005",
      "minAmount": "0.002"
    },
    "provider": "grundpreis.halowerk.com",
    "providerUrl": "",
    "serviceName": "",
    "tags": []
  },
  "source": "agentic_market",
  "summary": ""
}

What the leaf hashes

{"body":"91592faf57c1a5d0e7903f6c79e962be1ca38b121b5b9e3ecebdf4cdd58794cf","id":2519,"kind":"listing","method":"baseline/1","observed_us":1793025266868101,"prev":null,"subject":"agentic_market:grundpreis-halowerk-com","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. 0x3a8ed851725ca21716eab27a47141f1a3349c3b40ffea7ded39e7ad9303d252b
2. 0x7832969a6fd1385db95c6cd552201ef3b246e5e1c98c460b91fa04754b4d94e5
3. 0x517f44aa7d60d0b840c1c77b23d09becc7b0684e578806703cd4d1a5c7feb5f1
4. 0xbde2518ba03b964ad0c53fb742a93d06f21b2f5fdbae11974e0c9eb5acdb4635
5. 0x472d6f0ad270ec0cdf36d908ad7005814cd40b920c7063740ca17f216f117667
6. 0x6b7264c655653078d1be70b3b2ca4388fc27c617496f5c8f43754484ee1a752b
7. 0x6677ddf6167a65ce72fd39136bf542792d0497afe9c965f72bc72ea41258124e
8. 0x9141b81cdea4d08efd8ab22c31829b1db038b6b766e3504178f720302d425116
9. 0x0955a8913c350c9c9ef2cc0992a5f48059533b9ac5d73b2b5427ca48abc7f553
10. 0x863fdad252f29b9d159c447e1d98ff6a548fe9d1906f3279b63f975f260e25a5
11. 0x229584c1d304842544db84ca7b368b5ececeb9d3bea2b23265eba1c7595d1220
12. 0xdb4b9388e3fe1df4b04e149e559f925fb354066ae1d2537fd6f918162716fadf
13. 0xe2214b3d6a48396930d1739b02ea366de2aac5337c9b9ff2aff28cecf6518139
14. 0x7f594f5609f388d64d3cda87b5631d393ee8300bb09bad71f150113a5886ee33
15. 0x4b52a97f7a80ff7778a702b85267b8d2e5c93ce160942656435c29ae7be68bf4
16. 0x2e6a32eb32761c210560e852405e2f865f958ddbe01027894f8b9c1b3433b9f0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae