Evidence row 2202110

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://chess-notation.x402tookit.com/piece-moves"
    ]
  ],
  "name": "Chess Notation Tools",
  "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": "Squares a knight, bishop, rook, queen, king or pawn reaches from a square on an empty board, with the count.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "piece": "knight",
              "square": "d4"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "asOf": "2026-10-12T01:02:04.109Z",
              "count": 8,
              "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.",
              "from": "d4",
              "notChecked": [
                "blocking pieces, captures, pins and checks (the board is empty)",
                "castling and en passant",
                "…1 more"
              ],
              "reasons": [],
              "source": "computed locally (piece movement rules on an empty board)",
              "squares": [
                "b3",
                "b5",
                "…6 more"
              ],
              "summary": "From d4 a knight reaches 8 square(s) on an empty board.",
              "verdict": "COMPUTED"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "color": {
                      "description": "white (default) or black, used for pawns only",
                      "type": "string"
                    },
                    "piece": {
                      "description": "knight, bishop, rook, queen, king or pawn (or n, b, r, q, k, p)",
                      "type": "string"
                    },
                    "square": {
                      "description": "Starting square such as d4",
                      "type": "string"
                    }
                  },
                  "required": [
                    "piece",
                    "square"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "asOf": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "count": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "degraded": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "disclaimer": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "from": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "notChecked": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "reasons": {
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "source": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "squares": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "summary": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "verdict": {
                      "type": [
                        "null",
                        "string"
                      ]
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-11-01T22:42:04.321Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-11-01T22:42:04.149Z"
    },
    "resource": "https://chess-notation.x402tookit.com/piece-moves",
    "serviceName": "Chess Notation Tools",
    "tags": [
      "chess",
      "moves",
      "knight",
      "bishop"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Squares a knight, bishop, rook, queen, king or pawn reaches from a square on an empty board, with the count."
}

What the leaf hashes

{"body":"7b7cf4bd769e557c63a1d6f9ccdb708c7842689ed5b6da0c4e1278489eacb57f","id":2202110,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646812524331,"prev":null,"subject":"x402_bazaar:https://chess-notation.x402tookit.com/piece-moves","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. 0x6226d206297092d12859f0949a9cbfdb452dc6dc28e8d8203e70916e5b468681
2. 0xf714f8d5a4e5290df0a2b7ee9cf595520ce41573ca52b95011b4cf8a2484ac90
3. 0xf3236f0ae03759f491f3effdd9c461ff61ae6f42f7cecf2a4db86eb88e74f800
4. 0xb66bbb7dbb677808d1d4b29b63866e046d01a1a9e43d948fa17a00c8472720a8
5. 0x605072fa60c7faf8a784ec5c65aae732aa183d0764c86d3d706d3f9b9eac74f0
6. 0x46846ea1a0ba75fdf1a8449687ec917baf6f6a7103fc2453e465c9b345adc9e1
7. 0x6c19b874efea6d0bd0e10911b1ddd5c48d9e9f96f541ebae595034685fe58712
8. 0x80aa7985fa3584d8e410e3de871e4f12322ebd0ab2a3b93e703f2dd1f1ce116a
9. 0x588430c97fd5fbfe4c2576f65ed300081c08aa32cd475cc8fa6d552355825343
10. 0x0363db2ddd4804d8589daf989402865cc229bc39219381b3117c3d58f106c28d
11. 0xbfa01cba6849cecd2c8f2b513afec8bb5ea92a87c56cd492662578b665f74197
12. 0x01f1d6bc3b4b6d999bc8426485b340e41a9ad059d38c36f458e881f8b52146d1
13. 0xfcf5d9c790c40588489c41a23736feba4efc9e83eda3317c30f53a98ce8d1d89
14. 0x6ae97c2bdc679e3326a739627f6c3a307d7e25e547b9bf23dbf2622fb26d858e
15. 0x23f4763e8db2efe57fbc28dfc68f2b97b65f54a03425994e68157763af649a50
16. 0x0e5696ae625571c52ddcd8dc09aa6c994b4ab38f2086df20d56f1f01c603e501
17. 0xf9973981f80219d4f00fa9186b40a8144accc0c9875572fb79eaea312a21a187
18. 0x4d205063c881c48edbbb37762a8d3bbb7444d4c42daa882f663a231893d25c35
19. 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af