Evidence row 122005

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://stats.openverbs.com/v1/correlation"
    ]
  ],
  "name": "Pearson correlation",
  "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": "Pearson correlation coefficient and covariance of two equal-length paired series. Rejected as a clean 400 if the lengths differ or either series has zero variance (correlation undefined).",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "x": [
                1,
                2,
                3
              ],
              "y": [
                2,
                4,
                6
              ]
            },
            "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": {
                    "x": {
                      "description": "First series.",
                      "items": {
                        "type": "number"
                      },
                      "maxItems": 100000,
                      "minItems": 2,
                      "type": "array"
                    },
                    "y": {
                      "description": "Second series (same length as x).",
                      "items": {
                        "type": "number"
                      },
                      "maxItems": 100000,
                      "minItems": 2,
                      "type": "array"
                    }
                  },
                  "required": [
                    "x",
                    "y"
                  ],
                  "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": "2026-10-08T05:38:33.483Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-08T05:38:33.231Z"
    },
    "resource": "https://stats.openverbs.com/v1/correlation",
    "serviceName": "Pearson correlation",
    "tags": [
      "pearson correlation",
      "correlation coefficient",
      "calculate covariance",
      "paired series correlation",
      "linear relationship stats"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Pearson correlation coefficient and covariance of two equal-length paired series. Rejected as a clean 400 if the lengths differ or either series has zero variance (correlation undefined)."
}

What the leaf hashes

{"body":"4bbed7dee194bb50423ae18ea2bfd7edbe06c0505d1c8e490a57da301a6d0424","id":122005,"kind":"listing","method":"baseline/1","observed_us":1793025620793625,"prev":null,"subject":"x402_bazaar:https://stats.openverbs.com/v1/correlation","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. 0x4f2a0d50b73f9056a183719bcf1a68ca0741730409df6c47aa22f21319b53ee2
2. 0xaf30fa6a24ef02bd0ddad509b12897eaf6bab7540cba189556f970af8ea1c7cc
3. 0x4e876c765ebab26b1770c2ac7b459d10d3aad7750f12467063f2bb2ddeb84112
4. 0x3282d9830d899520b1d87a6ea7c4bcc1feeb2b1af8d22f3132fb0c9eaddf48c6
5. 0x6c75581470efa11d57ef9e84f102c15c2a6ddeea60a62041fd89d6b5297230cc
6. 0xb656ed3c4b871119a8a7780f956e7b5287ea175cb164cc42b830f44f6c729b11
7. 0x736ec247a09f7091f17b9ee05500cf54b258325afbe6852563bba3f9cbe2de8f
8. 0x36e97ff41387896104c89fa5234d0ce76ef0e4361db68e74b1598e885a6995b5
9. 0x554945e31247d5effa12c35a766af0a6593ce3d6c46306c9e801ec9b4f3dce47
10. 0x9c9aa21507586994cc0a4dfd3b2e86976a38eb16db18f84817d4a85797c70f48
11. 0x72d408a0419640ce55a8ca5f9c16e8da5334b5f106300a379634eb22bded71e1
12. 0xaf14a84837a57dc5a0cb0ebd158daaad24c19301b9257d9e97c322a7d8c54bc0
13. 0xf7d2cf278e5d2768b8bdb70730c378877cf7165d8efcbec8bcd3282fdc50d177
14. 0x0733993143f0230e79482cef2c38e95d98f9eafbe64a43cdc74a4545938a4167
15. 0x2be1e80e065dd6b2cc75a7142be22225acd144ac975d70bf24b4f01fd76dc497
16. 0x2e6a32eb32761c210560e852405e2f865f958ddbe01027894f8b9c1b3433b9f0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae