Evidence row 1784800

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://matrix.openverbs.com/v1/determinant"
    ],
    [
      "x402",
      "https://matrix.openverbs.com/v1/inverse"
    ],
    [
      "x402",
      "https://matrix.openverbs.com/v1/multiply"
    ],
    [
      "x402",
      "https://matrix.openverbs.com/v1/solve"
    ],
    [
      "x402",
      "https://matrix.openverbs.com/v1/transpose"
    ]
  ],
  "name": "matrix.openverbs.com",
  "owner_address": null,
  "raw": {
    "caip2_networks": [
      "eip155:8453"
    ],
    "category": "",
    "description": "",
    "domain": "matrix.openverbs.com",
    "endpoints": [
      {
        "description": "Compute the determinant of a square matrix via Gaussian elimination with partial pivoting. A non-square, ragged or empty matrix is a clean 400; a singular matrix simply returns 0.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": [],
            "group": "body",
            "name": "matrix",
            "required": false,
            "type": "array"
          }
        ],
        "pricing": {
          "amount": "0.004",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "2",
          "l30DaysUniquePayers": "2"
        },
        "serviceName": "Determinant",
        "tags": [
          "matrix determinant",
          "compute determinant",
          "square matrix determinant",
          "gaussian elimination determinant",
          "determinant api"
        ],
        "url": "https://matrix.openverbs.com/v1/determinant"
      },
      {
        "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 }.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": [],
            "group": "body",
            "name": "matrix",
            "required": false,
            "type": "array"
          }
        ],
        "pricing": {
          "amount": "0.004",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": null,
        "serviceName": "Invert a matrix",
        "tags": [
          "matrix inverse",
          "invert matrix",
          "inverse matrix api",
          "gauss jordan inverse",
          "check matrix invertible"
        ],
        "url": "https://matrix.openverbs.com/v1/inverse"
      },
      {
        "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.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": [],
            "group": "body",
            "name": "a",
            "required": false,
            "type": "array"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": [],
            "group": "body",
            "name": "b",
            "required": false,
            "type": "array"
          }
        ],
        "pricing": {
          "amount": "0.004",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": null,
        "serviceName": "Multiply matrices",
        "tags": [
          "matrix multiplication",
          "multiply matrices",
          "linear algebra multiply",
          "matrix product api",
          "compute a dot b"
        ],
        "url": "https://matrix.openverbs.com/v1/multiply"
      },
      {
        "description": "Solve the linear system A·x = b for a square coefficient matrix A and vector b via Gaussian elimination with partial pivoting. A non-square A or a b of the wrong length is a clean 400. A singular system is NOT an error — it returns a successful { solvable:false, solution:null }.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": [],
            "group": "body",
            "name": "a",
            "required": false,
            "type": "array"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": [],
            "group": "body",
            "name": "b",
            "required": false,
            "type": "array"
          }
        ],
        "pricing": {
          "amount": "0.004",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": null,
        "serviceName": "Solve a linear system",
        "tags": [
          "solve linear system",
          "linear equation solver",
          "matrix solve ax b",
          "gaussian elimination solver",
          "solve coefficients vector"
        ],
        "url": "https://matrix.openverbs.com/v1/solve"
      },
      {
        "description": "Transpose a matrix, swapping rows and columns. A ragged/empty matrix is a clean 400.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": [],
            "group": "body",
            "name": "matrix",
            "required": false,
            "type": "array"
          }
        ],
        "pricing": {
          "amount": "0.004",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": null,
        "serviceName": "Transpose a matrix",
        "tags": [
          "transpose matrix",
          "swap matrix rows columns",
          "matrix transpose api",
          "flip matrix axes",
          "convert rows to columns"
        ],
        "url": "https://matrix.openverbs.com/v1/transpose"
      }
    ],
    "enriched": false,
    "iconUrl": "",
    "id": "matrix-openverbs-com",
    "integrationType": "",
    "isNew": false,
    "name": "matrix.openverbs.com",
    "networks": [
      "Base"
    ],
    "priceSummary": {
      "avgCostBasis": "exact",
      "avgCostPerTransaction": "0.004",
      "currency": "USDC",
      "maxAmount": "0.004",
      "minAmount": "0.004"
    },
    "provider": "matrix.openverbs.com",
    "providerUrl": "",
    "serviceName": "",
    "tags": [
      "matrix determinant",
      "compute determinant",
      "square matrix determinant",
      "gaussian elimination determinant",
      "determinant api",
      "matrix inverse",
      "invert matrix",
      "inverse matrix api",
      "gauss jordan inverse",
      "check matrix invertible",
      "matrix multiplication",
      "multiply matrices",
      "linear algebra multiply",
      "matrix product api",
      "compute a dot b",
      "solve linear system",
      "linear equation solver",
      "matrix solve ax b",
      "gaussian elimination solver",
      "solve coefficients vector",
      "transpose matrix",
      "swap matrix rows columns",
      "matrix transpose api",
      "flip matrix axes",
      "convert rows to columns"
    ]
  },
  "source": "agentic_market",
  "summary": ""
}

What the leaf hashes

{"body":"6e52a6ed74e80aae8c66b0b9a70d8dd262bf1da72c5942555f2fc88e59af5699","id":1784800,"kind":"listing","method":"sync.agentic_market/1","observed_us":1793557140321479,"prev":2829,"subject":"agentic_market:matrix-openverbs-com","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-01 (302406 rows).

1. 0x2e3162964de686e24066014493abefaef3ebcbb1af584736f61819b4ebf2113c
2. 0xd6736ec839e3bfa805a1cd0aa96cd3178e7243170b33db91a8645324646bb92a
3. 0x54d34053f08050cc4acea9aedc8c7ceb6e2ddca8a4c2eb5f8b88c955a04e174e
4. 0x6a1f8e673e0855539ef419fe6d25af5973cd9f4fdf7ff2452d702c7bb634b774
5. 0x32803011b6f0f56c6f881622239c7312fc1fd52c74aa1d12584c963df75cb56f
6. 0xd49f772b3801f6385e5597fcb41e9b299254e3355f6f4e940810ce84b7dc09d7
7. 0xf7f039be7eebca7b22a51783dd63b9b534ece8504f050629ddc1905ff6d7ee33
8. 0xc641c2337cfe2a54727c55cd83153f403cb5761c82a3a129f7a857c9b77f5512
9. 0x99d868a143fa11d2679ab68ad5dfad864f7f76810311f50e4aa4387883f6713c
10. 0x9a211678fd18a82d04bfd6bcfee8a905beab9205e6a0363cecd39c090d10a2e2
11. 0x849cfb4589178cf0d1d37479ba128f95694c7f3f443353ef3bc84ad044a641d3
12. 0x675ad332e4e03c6ca7b83cb47e436561f58dcfd1e7039a7e5688dd0ab3ddfc65
13. 0x0112f1cf16780e57f3e96886bf4fa05aa46598025dc9396eb1cbe8b1dcdffd9f
14. 0x894f627e9eac1731ca26b2b4b6529eb16ab1b15294210edac68c8378063e2d8d
15. 0x80b1e578d986f759ca01ea02c7a922e757a26a65318f9844ac72c5c1d4fe339e
16. 0xa856ad79e6f29a2b5516257f0d4817172cca11251fe2e7e8f3911b105fe2b622
17. 0x02b3554752e71a19b12d7a76dbff436e85387226ceec89fdebdcdaf0122c2932
18. 0x1973893697931b7512ae5dc1a3c92ef92f633ae3574dce9029a35b5e94d2d364
19. 0x3315fd2757fdd435852cc277377234a3f3909a6d2a089d0e36f6d59aacfda910

Day root

0x7fa2cba1cf3d6b35630896f5fe1a650adb307ea2c376e80a5f2d9276b7cb5ab3

Chained

0x577ff89ba012beeff3197bcff7fa86752074bdf54205a24359cc437be2a952a4

Published

On Arc Testnet, block 70262758: 0x435bc1b9331471d72e1998f2e420983b5189d4da65ffbd6f27ef40daf5e1ea90