Evidence row 116733

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://matrix.openverbs.com/v1/multiply"
    ]
  ],
  "name": "Multiply matrices",
  "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": "Multiply two matrices A·B. The inner dimensions must agree (columns of A equal rows of B); a mismatch or a ragged/empty matrix is a clean 400.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "a": [
                [
                  1
                ]
              ],
              "b": [
                [
                  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": {
                    "a": {
                      "description": "Left matrix (m×n).",
                      "items": {
                        "items": {
                          "type": "number"
                        },
                        "minItems": 1,
                        "type": "array"
                      },
                      "minItems": 1,
                      "type": "array"
                    },
                    "b": {
                      "description": "Right matrix (n×p).",
                      "items": {
                        "items": {
                          "type": "number"
                        },
                        "minItems": 1,
                        "type": "array"
                      },
                      "minItems": 1,
                      "type": "array"
                    }
                  },
                  "required": [
                    "a",
                    "b"
                  ],
                  "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": "2026-10-02T02:32:51.074Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-02T02:32:50.789Z"
    },
    "resource": "https://matrix.openverbs.com/v1/multiply",
    "serviceName": "Multiply matrices",
    "tags": [
      "matrix multiplication",
      "multiply matrices",
      "linear algebra multiply",
      "matrix product api",
      "compute a dot b"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Multiply two matrices A·B. The inner dimensions must agree (columns of A equal rows of B); a mismatch or a ragged/empty matrix is a clean 400."
}

What the leaf hashes

{"body":"752f491f769118d7327fa6913c993cd5c022937a10983a94779744f4ab638462","id":116733,"kind":"listing","method":"baseline/1","observed_us":1793025610217975,"prev":null,"subject":"x402_bazaar:https://matrix.openverbs.com/v1/multiply","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. 0x108b4a97eb0cda497b2117b3366fd672597b67c73ac544fecdc27b16516fdf24
2. 0x227f4cadc5c9feb077c08890d5ed02e9cd8fa65fe63aca1fcdae151aa672994b
3. 0xaf94520a2ad126b047ccfb9cf92ab18c2d1b625a7ee2c1ea0fa7b922eb1e9d75
4. 0x223a1d6b6cc29e618833a03bc06c2ea09f4cd6b450df43dfd906db90b4464c4d
5. 0x508f38561033847aea28d272ea22c87bc142996c88b42f45c2194f301e32f11b
6. 0xfcee8f35739344b58597226f13c3754c25b892c2224bc5cba49bcba54d7efb9b
7. 0xd954e27553b603fee22d418b1f5af0c0684ba7d180b1e0589984c41e670e4d0d
8. 0xc9685f4fd395267631de22508b369c78928fc2a75baf01a4802703770433a14d
9. 0xc78969e1448b4e00b22c1b3dc7e51f8123c9e7092baaaedc96ecfaebe34d69e7
10. 0x966bf10795d50c9f81eb3c272b7279beecfe723480c50bbb3c87bcd23b5cd5b5
11. 0x27ff2940d5376ec3cc70015c126b688bae838938b2846686279ceb190eb69456
12. 0xc02d9eff6ef94d46d90d54320548f18fc3f05787047265548577569253c19969
13. 0x294f7935f78a896b5f246a7c9a7ee1b023720acdb03fff3cd549c63479848ec9
14. 0xb49e8c2564256e5322e375cb619d9ac70fd17c1d1eba9c991bba4cb6428f45cc
15. 0x60582ab4b41e72eb70eb0bce07fbf0fb4d2b62a8bad5be50f5d16d511adc746c
16. 0xc6a4d7899a0f442958e26505011190b7cff2483611c1b94eba9043e0ba9ac36e
17. 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae