Evidence row 2201591

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://math-geometry.x402tookit.com/matrix-ops"
    ]
  ],
  "name": "Algebra and Geometry Solvers",
  "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": "Matrix determinant, inverse, transpose, rank, trace, product with a second matrix, and eigenvalues of 2x2 and 3x3 matrices.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "matrix": "4,7;2,6",
              "op": "inverse"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "asOf": "2026-10-11T08:51:19.119Z",
              "conditionNumberInfinity": 14.3,
              "degraded": false,
              "determinant": 10,
              "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
              "inverse": [
                [
                  0.6,
                  -0.7
                ],
                [
                  -0.2,
                  0.4
                ]
              ],
              "notChecked": [
                "exact rational results (decimals are returned)",
                "numerical stability of nearly singular matrices (the condition is flagged for inverses)",
                "…1 more"
              ],
              "reasons": [
                "Gauss-Jordan on [A | I]."
              ],
              "source": "computed locally",
              "summary": "Inverse found (determinant 10, condition number about 14.3).",
              "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": {
                    "matrix": {
                      "description": "Rows separated by semicolons: 1,2;3,4",
                      "type": "string"
                    },
                    "op": {
                      "description": "determinant, inverse, transpose, rank, trace, multiply or eigenvalues",
                      "type": "string"
                    },
                    "other": {
                      "description": "Second matrix for multiply",
                      "type": "string"
                    }
                  },
                  "required": [
                    "op",
                    "matrix"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "asOf": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "conditionNumberInfinity": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "degraded": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "determinant": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "disclaimer": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "inverse": {
                      "items": {
                        "items": {
                          "type": "number"
                        },
                        "type": "array"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "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": "2026-11-01T23:37:26.484Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-11-01T23:37:26.308Z"
    },
    "resource": "https://math-geometry.x402tookit.com/matrix-ops",
    "serviceName": "Algebra and Geometry Solvers",
    "tags": [
      "algebra",
      "matrix",
      "determinant",
      "inverse",
      "eigenvalues"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Matrix determinant, inverse, transpose, rank, trace, product with a second matrix, and eigenvalues of 2x2 and 3x3 matrices."
}

What the leaf hashes

{"body":"a335c7358e5088c09443877ba6f006db6ecceeb17d0ded5f2b786a9dca8fca5b","id":2201591,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646806800053,"prev":null,"subject":"x402_bazaar:https://math-geometry.x402tookit.com/matrix-ops","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. 0x03b0040a71f371044fd20d3b605b8837c74c018c3a4ce2efca651bd90ea0a998
2. 0x1a2534420e1ca2e1736fda8a3456c146f7728205d41cdd23b6f6f6fcc400d486
3. 0x699b0c3e4f122115324193bf2fc69bde7403a358e0942d5f945825413c86ff0c
4. 0xd5d88822fb7508a4ab80b08de420a5060e96e07e24518d9072bc83223c27eb3d
5. 0xe6a4c42814161e0b5234c99a88133cab423589ecb1c0378b23dc78ca4c0b6d45
6. 0xa828343d3d83195f76a1a50685654cafd4d61c88f6f77088c647c3d4fbffb442
7. 0xf9ac2f7d71e6ce7b963aac578c6114a85fa777fdbb8c03a7bdcaf2b756b2023d
8. 0x6c280248e9ac86574b3388978ff84f02f11769f2c79112d3087f98c79cfefd0f
9. 0x714fcf901248346ac425ec6614c0b675905ff0ed6d26e9a57ab57f2051f002a1
10. 0x9eb0634f24ad97f771ca0b8a6bead1471911158a27c1480390fe93d51edb00de
11. 0xb00d74146bafcb898ce02fde92fe625ed050319119aef4d9f503fa8370c8b24f
12. 0xf11ae2cb1682c9682f842de4b47631873e04eb9bb372b2940fa325facb202e3e
13. 0xf7591712adf911c6cfa936eea0be6a219c802459fb85a626a46bcc03207d81e1
14. 0x9acdcc385ecc9f1094faf2e01677d863638d23bede5aed4ca22def76698e0af3
15. 0x150a4dbcf309a6bb857da0b59f7588bd57a20fca094e579bf41d6cc6df9c7bff
16. 0x7cb861d18f06406535ade133f716d897f27d257cf0121f99d94c78c713c4b54d
17. 0x53a741b69e9e51c4a288a74712aa6ac3fb28c8923cd3e6461d161c4f2d48b31a
18. 0x050f2978b537f7afb21ee1551577cdf146d1c56f4df12d24315ae5e69366b0a4
19. 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af