Evidence row 279320

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": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-21T17:20:27.987Z"
    },
    "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":"0741a37923bcc4238f7be0ea1df1863e82b980ca185902b1b5cc0a771e86332c","id":279320,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793042197497582,"prev":77160,"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 2026-10-26 (296695 rows).

1. 0x7e4fcb12fa261c1247ba789d32a75b5195942be7b53f98f11625c7cd39c997f5
2. 0xbeac4aaac2a5a3d440c5fc81c44c412999e3adf654ae5a492eecf99e8a0e47e3
3. 0xec4cf556d1005b9dc5b5029e13bc5a41d17d40ee9f00566ecb95978fb0a192c8
4. 0xb533a58b64c3e8b2419af215c618327ee4b0cad7a5863cbe62d6db20661daee2
5. 0x72a24250690347995634abd6103fe1bb77ce4a69f5e2a66cb10a1563265b39c1
6. 0x14976bc0d4e7d36193c2c3e2cec9bd48e15b26e41f50e6296690cce7853a3c7a
7. 0x05d52221d7846103bb4a0b1f8657afcc96ca97a78a051c1b9cd520849f468b5a
8. 0x39b7bdf8346ee40a433e89dd598296cdac633b4a46c3744497041c3e324ebd50
9. 0x7d6ff8d99565f9f3d177151c94c94ffb5c789a5608dacd07ddde5b20f0151c26
10. 0x2718d6dca57166b1f1fa238e8a139e4cdbab7b7485a09970fff985d3b3878bfd
11. 0xaf10e841089e5989890dc77ffce42a46564d25ef15f30d1e35bf53a495483ad4
12. 0xab729e4203b650f2a3c15efd6fd44eb2482232373bc1de662fd9d496869eb2d3
13. 0x0bffb634300aa5609bddaa79e8d31d7cde36c0a5a4465472f809b9f5287e40d2
14. 0x7721d38652b6444b18e1193824e50490ade04851ce6221771f6e374c4527d80f
15. 0x15039087bf60ae9b06b756ec3cbc299760e59923a438bbd91e34d105186db0ed
16. 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae