Evidence row 2201653

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://linear-algebra.x402tookit.com/transpose"
    ]
  ],
  "name": "Linear Algebra",
  "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": "Transpose a matrix (up to 10x10) with trace, symmetry and skew-symmetry flags, and Frobenius and 1-norms.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "A": "[[1,2,3],[4,5,6]]"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "asOf": "2026-10-12T00:51:57.037Z",
              "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.",
              "frobeniusNorm": 9.53939201417,
              "notChecked": [
                "symmetry is tested with a 1e-9 relative tolerance, not exactly",
                "definiteness (use /eigen for that)"
              ],
              "oneNorm": 9,
              "reasons": [
                "Entry (i,j) of the transpose is entry (j,i) of the original.",
                "Trace, symmetry and skew-symmetry need a square matrix and are null here."
              ],
              "shape": [
                2,
                3
              ],
              "skewSymmetric": null,
              "source": "computed locally",
              "square": false,
              "summary": "Transpose of the 2x3 matrix is 3x2.",
              "symmetric": null,
              "trace": null,
              "transpose": [
                [
                  1,
                  4
                ],
                [
                  2,
                  5
                ]
              ],
              "transposeShape": [
                3,
                2
              ],
              "verdict": "TRANSPOSE_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": {
                    "A": {
                      "description": "Matrix, JSON like [[1,2,3],[4,5,6]] or 1,2,3;4,5,6 (max 10x10)",
                      "type": "string"
                    }
                  },
                  "required": [
                    "A"
                  ],
                  "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"
                      ]
                    },
                    "frobeniusNorm": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "notChecked": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "oneNorm": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "reasons": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "shape": {
                      "items": {
                        "type": "number"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "skewSymmetric": {},
                    "source": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "square": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "summary": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "symmetric": {},
                    "trace": {},
                    "transpose": {
                      "items": {
                        "items": {
                          "type": "number"
                        },
                        "type": "array"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "transposeShape": {
                      "items": {
                        "type": "number"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "verdict": {
                      "type": [
                        "null",
                        "string"
                      ]
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-11-01T23:34:19.098Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-11-01T23:34:18.929Z"
    },
    "resource": "https://linear-algebra.x402tookit.com/transpose",
    "serviceName": "Linear Algebra",
    "tags": [
      "transpose",
      "matrix",
      "symmetric",
      "trace"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Transpose a matrix (up to 10x10) with trace, symmetry and skew-symmetry flags, and Frobenius and 1-norms."
}

What the leaf hashes

{"body":"a914b4662db1ced495ae6d2caf7b3445d16dca9b71140413cd9511bdaf43b499","id":2201653,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646807715606,"prev":null,"subject":"x402_bazaar:https://linear-algebra.x402tookit.com/transpose","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. 0x50c38eab0d10f11b33a83c359416c4d8c65e0ec92b3306aa2f9a42d087a7396a
2. 0x9f4569d7871d5befbf4b3a1295d60862da347407aca4fd9769e029359454355f
3. 0xdaabe2d9059ec62f4ab1bc27faa07b80b7ca2040f6c42a68ea59d533b64f02aa
4. 0x5354959eaa8f91f0f6b5f83d800843d019619496e6a5a6f6f948c39c602da525
5. 0x664f5761eb84d9358ca5c823a6f096fe77ee40915944a1cbcf47ed07cc56907b
6. 0x73a1029ce8e73c2a102f2cf37ea90509d1974fecb2636510010ce4f56d97d6f2
7. 0x4884992b36b9bb443f9f32825e03f434281e6a300cb7e1fabb6309695bd55f03
8. 0x94456b65efdfb21c399c8c8024c1331bb07d9b5efbd08e50a0a0f53f2e152c45
9. 0x458befb83b94dc59ae213db43157522fcab02c16c40fb3771b9ade325b1ba6a0
10. 0xe25393c83ae7a4d9eac48c9bd57f89eeb74855c41928d010888eb94f3b1158d4
11. 0xffaa649f3c394fc6a729f7e62fd70cc67baf7cac94b4346600e6beaa0c231876
12. 0x35f84c0e4e28cd4a63c3ad6490420fe24bf67bba5f080e714a71d6cb0d991695
13. 0x2f0e87a22fc6aaaa04d17a8f1c5dda340b8d3c208a1b8e26986aed7f54ec42a7
14. 0xa96ecfe7ab9f1788120ca262a1b69b7b258160df41b4041d36fcd211c95d26d9
15. 0x67c99d356de30f9cfab88af48fbaa18909ef230dd09947e84da060bc03aca929
16. 0x1068659ec8f2bcf26e4ad39786557a8c45d60e5ebba4fce2fb9962b2c9c59920
17. 0xf9973981f80219d4f00fa9186b40a8144accc0c9875572fb79eaea312a21a187
18. 0x4d205063c881c48edbbb37762a8d3bbb7444d4c42daa882f663a231893d25c35
19. 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af