Evidence row 116732

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://matrix.openverbs.com/v1/inverse"
    ]
  ],
  "name": "Invert a matrix",
  "owner_address": "0xb3f4de103f34b99f0da19b4f16d6b53a14c2194a",
  "raw": {
    "accepts": [
      {
        "amount": "4000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A",
        "scheme": "exact"
      }
    ],
    "description": "Invert a square matrix via Gauss-Jordan elimination. A non-square, ragged or empty matrix is a clean 400. A singular (non-invertible) matrix is NOT an error — it returns a successful { invertible:false, inverse:null }.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "matrix": [
                [
                  1
                ]
              ]
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "additionalProperties": false,
                  "properties": {
                    "matrix": {
                      "description": "Square matrix (n×n).",
                      "items": {
                        "items": {
                          "type": "number"
                        },
                        "minItems": 1,
                        "type": "array"
                      },
                      "minItems": 1,
                      "type": "array"
                    }
                  },
                  "required": [
                    "matrix"
                  ],
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-02T02:32:50.049Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-02T02:32:49.771Z"
    },
    "resource": "https://matrix.openverbs.com/v1/inverse",
    "serviceName": "Invert a matrix",
    "tags": [
      "matrix inverse",
      "invert matrix",
      "inverse matrix api",
      "gauss jordan inverse",
      "check matrix invertible"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Invert a square matrix via Gauss-Jordan elimination. A non-square, ragged or empty matrix is a clean 400. A singular (non-invertible) matrix is NOT an error — it returns a successful { invertible:false, inverse:null }."
}

What the leaf hashes

{"body":"bb9c4f0b80e63a7e5acead657422bc0ce40b7de89655b727df88dc8695ded1f7","id":116732,"kind":"listing","method":"baseline/1","observed_us":1793025610217010,"prev":null,"subject":"x402_bazaar:https://matrix.openverbs.com/v1/inverse","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

1. 0xeff914dd1cb7b30d396532f389f45c7834d7427038d06cedf6ea32364e5cae42
2. 0xd88d5369321d918ff27edeb7132918955cb16cdc72fbc446adbfaca91262f966
3. 0x630e7edfbadf8fe1e1887c86310fa573358d135159d72c40cadc745833ce047a
4. 0x01af3ba99d6900cc00fbef018005dd5f168b287ca01a38c8be8d2b996b7b166a
5. 0x88d7892ffc3d38e83eee2a4a7b35f5ee0072d9f4c464bac7ff90f1207a922b2f
6. 0x7caa6eb1fd21c30b1a58c66a87c969cd18df577e4f67cd81608d7b2627170957
7. 0xdba2da1a182babe047c4303921881784316e4e33d5bfe1a243809b7c220ad439
8. 0xe6caacae8008ebe2d4af96592fedc1dd1683d414daf68417b592bd2c95ceb89c
9. 0x9a1ac8afd86edde88ef2bbbb9ea2299a023fa773eeaa5783a8e634d48ce7fc24
10. 0x3596b9717d8451909e6f610690c73b18907f0580f92978c2a8862668158a8f31
11. 0xe34b4862878cc4926f0e4b84b3f031ef1f0cf0de9bf8fb3c13adbc6abc010ee1
12. 0xb0cc0b4ce5a68e83d3e3e55b0387f828adf6f5eb6cfa666d75f6e16ed9d89c1f
13. 0x746e9e5b6765727b6b96f41204cc115b0302259f6c67be0cf0efbf245601d500
14. 0x614d844c9e0509d9f9e63697aa2935555bce5f13695a8dc0047aa9e9898d70b3
15. 0x95657a7d540ed6cac0bde9995782333b2562a9a6641853269ac95148827410f0
16. 0x5fb5dda563336cd1bc1b9f44c52b76237ae72ed2145cb9290f39f304ca7dd678
17. 0x74a0a08e4e7ab9aa5bfbead33dec7e1c7e8e364cff69a63720d764bbe987aadc

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae