Evidence row 2201901

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://file-formats.x402tookit.com/extension-vs-content"
    ]
  ],
  "name": "File Format Inspector",
  "owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
  "raw": {
    "accepts": [
      {
        "amount": "20000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
          "transactionVersions": [
            0
          ]
        },
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:137",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      },
      {
        "amount": "20000",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:42161",
        "payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
        "scheme": "exact"
      }
    ],
    "description": "Compare a file name's extension with its real type from the first bytes; flags executables disguised as documents or images.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "filename": "invoice.pdf",
              "hex": "4d5a90000300000004000000ffff0000"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "asOf": "2026-10-11T23:43:20.979Z",
              "degraded": false,
              "detectedCategory": "executable",
              "detectedMime": "application/vnd.microsoft.portable-executable",
              "detectedType": "Windows PE executable (MZ)",
              "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
              "doubleExtension": false,
              "extension": "pdf",
              "filename": "invoice.pdf",
              "notChecked": [
                "anything beyond the header bytes",
                "double extensions are judged by the last one only",
                "…2 more"
              ],
              "reasons": [
                "The content is Windows PE executable (MZ) but the name says .pdf: an executable disguised under a harmless-looking extension."
              ],
              "source": "computed locally (published file signatures)",
              "summary": "Mismatch: .pdf versus Windows PE executable (MZ).",
              "verdict": "EXECUTABLE_DISGUISED"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "filename": {
                      "description": "The file name as supplied, for example invoice.pdf or photo.jpg",
                      "type": "string"
                    },
                    "hex": {
                      "description": "First bytes of the file as hex, up to 512 bytes",
                      "type": "string"
                    }
                  },
                  "required": [
                    "filename",
                    "hex"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "asOf": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "degraded": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "detectedCategory": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "detectedMime": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "detectedType": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "disclaimer": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "doubleExtension": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "extension": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "filename": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "notChecked": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "reasons": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "source": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "summary": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "verdict": {
                      "type": [
                        "null",
                        "string"
                      ]
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-11-01T22:54:02.858Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-11-01T22:54:02.563Z"
    },
    "resource": "https://file-formats.x402tookit.com/extension-vs-content",
    "serviceName": "File Format Inspector",
    "tags": [
      "file-type",
      "extension",
      "spoofing",
      "security"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Compare a file name's extension with its real type from the first bytes; flags executables disguised as documents or images."
}

What the leaf hashes

{"body":"8c0a462c814187b3439d943480006e85310530b34d7ab119daae8cb2e4663d8c","id":2201901,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646810119253,"prev":null,"subject":"x402_bazaar:https://file-formats.x402tookit.com/extension-vs-content","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-02 (444186 rows).

1. 0x83294b4141d0499844fccac59921c6b3463e5670b7bfb532f61cad4c1f53eecc
2. 0xdf48e27d09894c85c4e166a7e4eca08eac0ad99896897d3e006c7533763ade9a
3. 0x9832baa8172a8b7f82035829155d504e7ff972bd743bf7450184137d3962a33f
4. 0xf03f1d6d5d83c38ff51c33c80fbb09cb91b50c803d5bec99af42dcb181453b46
5. 0xc1f8944e46fc220fe93cb9632cb386b2701406c4569b6cd54dea0d9a2339ddce
6. 0x892b056dc7ed82e740f66207b196feaa9987aee1d858da2c3481a893ad3220ca
7. 0xd4c9c82e605d6aa31e40e53aab04d46beef4e00001f7de0bb45314fd6e8b8868
8. 0x9b3996cf4188a1965fdf644f187ebc4033996512375cfa854101070080654fdc
9. 0x6585370b019150c880c40270ab9dee0ceed03628a12203020ef140d171849aff
10. 0x9e2ca5752fef40d4be1227be83c850baaf380ccbd2be2b126e86d74ae001c6c7
11. 0x6012ca3e294d721e95293a0f0d4d05cfe67ff640b8184bb4d81660ad69ab45f4
12. 0x9236ce44089e10e350435c01e569b60f72046bb5112e06356a17b8f3c0a940ee
13. 0xf82dc9b9d8e081f36e55e80fab45654768c11eb158257f63f8ca7ff17d181d54
14. 0x5d40473873ebe898bcca4e49df524bf4345695f06abe3579f4bdb7b306b863f8
15. 0x46991481c678139203ebc3c532867ce1643c09ddc33966c4fb48bb7f033ab22f
16. 0x3b89dd05634a82075204d3c671f613081ddfd9df739c64c0a8f39081bdfa32c7
17. 0x1805ef693fbdb2c23fcb61616f830408ca89bec1dc5b68ee47a770ffc0b9760a
18. 0x4d205063c881c48edbbb37762a8d3bbb7444d4c42daa882f663a231893d25c35
19. 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af