Evidence row 408523

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://listing-grader-ai.lovable.app/api/public/paid-preflight/amazon"
    ]
  ],
  "name": "listing-grader-ai.lovable.app/api/public/paid-preflight/amazon",
  "owner_address": "0x154db68dfc226d9427a4aece976e1161f50939e4",
  "raw": {
    "accepts": [
      {
        "amount": "50000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "quote": "q_smr8pa7l5v6q9wa24",
          "version": "2"
        },
        "maxTimeoutSeconds": 600,
        "network": "eip155:8453",
        "payTo": "0x154DB68DFc226d9427a4aecE976E1161F50939e4",
        "scheme": "exact"
      }
    ],
    "description": "Product Listing Preflight — one metered assessment.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "category": "Home & Garden > Gardening > Seeds",
              "currency": "GBP",
              "description": "Everything needed to grow fresh basil on a windowsill: seeds, peat pots, compost discs and a step-by-step guide.",
              "features": "50 organic seeds; 6 biodegradable pots; Germinates in 7-10 days",
              "imageCount": "5",
              "keywords": "basil seeds,herb kit,indoor garden",
              "price": "14.99",
              "returns": "30-day returns on unopened kits.",
              "shipping": "Free UK delivery in 2-3 working days.",
              "title": "Organic Basil Seed Kit - Grow Your Own Herbs Indoors"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "checks": [
                {
                  "detail": "Title is within the recommended length.",
                  "id": "title-length",
                  "label": "Title length",
                  "scope": "platform",
                  "status": "PASS",
                  "weight": 10
                }
              ],
              "counts": {
                "fail": 0,
                "pass": 9,
                "warning": 2
              },
              "keywordObservations": {},
              "missingInformation": [],
              "payment": {
                "chainStatus": "confirmed",
                "quote": "q_example",
                "receipt": "rcpt_example",
                "transaction": "0x..."
              },
              "recommendations": [
                "Add at least two more product images."
              ],
              "score": 82,
              "summary": "Listing is close to ready; address the warnings before publishing.",
              "verdict": "NEEDS_WORK"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "additionalProperties": false,
                  "properties": {
                    "category": {
                      "description": "Marketplace category or path.",
                      "type": "string"
                    },
                    "currency": {
                      "description": "ISO 4217 currency code, e.g. GBP.",
                      "type": "string"
                    },
                    "description": {
                      "description": "Full listing description.",
                      "type": "string"
                    },
                    "features": {
                      "description": "Features/specs, separated by ; or newlines.",
                      "type": "string"
                    },
                    "imageCount": {
                      "description": "Number of product images.",
                      "type": "string"
                    },
                    "keywords": {
                      "description": "Comma-separated search keywords.",
                      "type": "string"
                    },
                    "price": {
                      "description": "Price as a decimal string, e.g. 24.99.",
                      "type": "string"
                    },
                    "returns": {
                      "description": "Returns policy text.",
                      "type": "string"
                    },
                    "shipping": {
                      "description": "Shipping policy text.",
                      "type": "string"
                    },
                    "strict": {
                      "description": "Refuse requests with missing fields.",
                      "enum": [
                        "1",
                        "true",
                        "0",
                        "false"
                      ],
                      "type": "string"
                    },
                    "title": {
                      "description": "Listing title.",
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "checks": {
                      "description": "[{ id, label, scope, status: PASS|WARNING|FAIL, weight, detail }]"
                    },
                    "counts": {
                      "description": "{ pass, warning, fail }"
                    },
                    "keywordObservations": {
                      "description": "object"
                    },
                    "missingInformation": {
                      "description": "string[]"
                    },
                    "payment": {
                      "description": "{ receipt, quote, transaction, chainStatus }"
                    },
                    "recommendations": {
                      "description": "string[]"
                    },
                    "score": {
                      "description": "integer 0-100"
                    },
                    "summary": {
                      "description": "string"
                    },
                    "verdict": {
                      "description": "READY | NEEDS_WORK | NOT_READY"
                    }
                  },
                  "required": [
                    "score",
                    "verdict",
                    "checks"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "json",
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input",
            "output"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-26T19:06:27.042Z",
    "quality": {
      "l30DaysTotalCalls": 3,
      "l30DaysUniquePayers": 3,
      "lastCalledAt": "2026-10-26T19:06:25.706Z"
    },
    "resource": "https://listing-grader-ai.lovable.app/api/public/paid-preflight/amazon",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Product Listing Preflight — one metered assessment."
}

What the leaf hashes

{"body":"205cd53a2a1086a421aeeb34056e6ff3012a5cab3ee9c14742bbe754208ae08a","id":408523,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793080310884935,"prev":279320,"subject":"x402_bazaar:https://listing-grader-ai.lovable.app/api/public/paid-preflight/amazon","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. 0x08334998c5648cd95bedd2bcdbf4fdf7de62edf035c97cbcd4befd93c2295785
2. 0x19c0daebe3113741b20bcb307ec1aa306aa5496cd0f9686847c237f8ed9ebbc4
3. 0x57dec6a12942ec092baccc56cffbfc90de1e48cea01e116c36df3724fc8d4935
4. 0x914b1784dd13ff9f1e3cf6f04ae58fedd1464423832a220d4df67e54c63eef85
5. 0xbbe61a40d13bffc3b90ce40c09c9c8d1b1f04983af1a5025a18283e2a05f164a
6. 0x067fdfdd90964d20191b158cbcc1759267eb01908f460aa79fe4c700927e458b
7. 0xe36c412b35a9ee02b7c9907f4dc60d5f3a71249faa9f42475a09fc15aeb92a4e
8. 0x1fbb99bb0c38e1db354f57e1410693fa5ab9483f6a0bd488cd498bbe62b6c6b4
9. 0x740ec594d6aff0936b9c48f184e5a2bc46e8f81097ecd3b4db9f1a8f0e8ba38b
10. 0x9b0ee21fb0dd4ea92822e278c74c3eb75e4e9befde7e8b9320eae9afc29fc065
11. 0x32ff11116925d4f6cb886f2b10aaee347411638da7594e1a01520f7289fefe5e
12. 0x032ecda033bf8a986e559148b1dda067c67bf4dee01f0000782b450c72286406
13. 0x74ffd6144e8464591ea30392b981f197426cfd361178829fb8a66915e2f727b0
14. 0x3e0ec8a2a8a954695a9b53a4a48a7656d7e3fd6a8795c73b49e2ef05b201ec3f
15. 0x2cf27e8a181d60d0dd27c186c2eddfcbb4e8fa71cf66feeb55a4d730e15ee8c4
16. 0x518b93854db03dc9fc938883abf30da6eaae5ae0d4336903968fd32a7df8c71b
17. 0x22c1fb9487ee0b9732fa017a0cc321eb27a60c08450d112f755089796e12cb1c
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4