Evidence row 2201196

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://text-similarity.x402tookit.com/hamming"
    ]
  ],
  "name": "Text Similarity",
  "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": "Hamming distance between two equal-length strings (text or binary), with the differing positions. Unequal lengths are undefined.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "a": "karolin",
              "b": "kathrin"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "asOf": "2026-10-12T00:50:07.130Z",
              "degraded": false,
              "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
              "distance": 3,
              "ignoreCase": false,
              "lengthA": 7,
              "lengthB": 7,
              "notChecked": [
                "insertions and deletions: Hamming distance only counts substitutions, use /edit-distance for strings of different length",
                "grapheme clusters: compared by Unicode code point"
              ],
              "positions": [
                2,
                3
              ],
              "reasons": [],
              "similarity": 0.5714,
              "source": "computed locally (Hamming 1950)",
              "summary": "Hamming distance 3 over 7 positions.",
              "verdict": "DIFFERENT"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "a": {
                      "description": "First string, up to 2000 characters",
                      "type": "string"
                    },
                    "b": {
                      "description": "Second string of the same length, up to 2000 characters",
                      "type": "string"
                    },
                    "ignoreCase": {
                      "description": "true to compare case-insensitively (default false)",
                      "type": "boolean"
                    }
                  },
                  "required": [
                    "a",
                    "b"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "asOf": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "degraded": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "disclaimer": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "distance": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "ignoreCase": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "lengthA": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "lengthB": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "notChecked": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "positions": {
                      "items": {
                        "type": "number"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "reasons": {
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "similarity": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "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": "2026-11-02T04:08:54.732Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-11-02T04:08:54.59Z"
    },
    "resource": "https://text-similarity.x402tookit.com/hamming",
    "serviceName": "Text Similarity",
    "tags": [
      "text",
      "hamming",
      "distance",
      "binary",
      "error-detection"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Hamming distance between two equal-length strings (text or binary), with the differing positions. Unequal lengths are undefined."
}

What the leaf hashes

{"body":"a94a93f32d4c591499c64889568770b68df093fc416230def0b25f94dcd5ed01","id":2201196,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646801247235,"prev":null,"subject":"x402_bazaar:https://text-similarity.x402tookit.com/hamming","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. 0xc18ecd93bbb84f0aebe311cc598e9971fe329d8d3dd4d00bc0756bf29bc3b4c6
2. 0xeddb86b01b496a58672aac883441e2209ed643851beb7b691a0dc3a9bddb51e4
3. 0x956e15f69166b35e939be5d392f5b67e1e7ff4f4d6b1ec95a4e63dab24ca80b7
4. 0x5fe27dbe40da2ead819e9f10eeb9363f7606f366c741d0a9952c1f849f6e4212
5. 0x2d1959967b097cf176bdfeb9806e4075d2f8387172ef85f63742b524d56163b1
6. 0xa8f31bd0611898c2c535a9137e8e7beafe76ead63c0d71b16bdff0899f346bd8
7. 0x5c5f84e018ccbee6542373c1ec2d7857a1a36f1177c359bf1d339aedfea9a378
8. 0x82452a9557ad64faa825234987cac4dc7f3b04c453d0d871e92cadc2a011aa0e
9. 0xf4966dd68e81b5114471b44a86f93d0df774cfadb2ae5d20f12a89a51323c14b
10. 0x0b5a471453206668a6eb19f48c05916ee653befcfcd6beffe12601aeabd22372
11. 0x1fa3c6e9243d9ae6c0546a8f2dae78ee6cfe9843f31a4b3bd9431dffa3ae06e7
12. 0x7ad018da9217f00e9553ad7f613d19ec65a84c3a339588527c8b35c90d6567b4
13. 0xd7f4adbe11763ae678ef4c51fd1fa9ddf52bf60add48464d376475766e9accfe
14. 0x0b45a0435ea40bcbc48c2b318e8c62aa48a7e6b10e52b4548ada394225a7bd9f
15. 0xcbfaf790331071a9b3499a4db6f9d951fe5d04baefda2c66846b52b023ab8ae5
16. 0x37d31d28d0bd3743650d57e9fbf999efa4592cac831267f83aa125335b35a16b
17. 0xdb8bd933619a267f9790faac9839143d202be46af284371cc369cdf683f897ba
18. 0x98cbbf2c68ab4c0b4db782aeb88bea1f30b02178cf8b5d3d24a931d19492ea6d
19. 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af