Evidence row 2201774

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://grades-calc.x402tookit.com/percentile-rank"
    ]
  ],
  "name": "Grades & Study Calc",
  "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": "Percentile rank of a score in a class list (mean-rank method), with rank from the top, mean, median and z-score.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "scores": "50,60,70,80,90",
              "yourScore": 70
            },
            "type": "http"
          },
          "output": {
            "example": {
              "asOf": "2026-10-12T01:53:42.538Z",
              "classSize": 5,
              "degraded": false,
              "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
              "maximum": 90,
              "mean": 70,
              "median": 70,
              "minimum": 50,
              "notChecked": [
                "whether your score is included in the list (include it for the usual rank)",
                "different percentile conventions (some use below / n or below / (n-1))",
                "…1 more"
              ],
              "percentileRank": 50,
              "rankFromTop": 3,
              "reasons": [
                "Percentile rank = (scores below + half the ties) / number of scores."
              ],
              "sampleStandardDeviation": 15.811,
              "score": 70,
              "scoresAbove": 2,
              "scoresBelow": 2,
              "scoresEqual": 1,
              "source": "computed locally (percentile rank = (below + 0.5 x equal) / n)",
              "summary": "70 is at the 50th percentile of 5 scores (3 from the top counting ties as better); class mean 70.",
              "verdict": "COMPUTED",
              "zScore": 0
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "scores": {
                      "description": "Comma-separated class scores, 2 to 500",
                      "type": "string"
                    },
                    "yourScore": {
                      "description": "The score to place in the class",
                      "type": "number"
                    }
                  },
                  "required": [
                    "scores",
                    "yourScore"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "asOf": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "classSize": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "degraded": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "disclaimer": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "maximum": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "mean": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "median": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "minimum": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "notChecked": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "percentileRank": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "rankFromTop": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "reasons": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "sampleStandardDeviation": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "score": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "scoresAbove": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "scoresBelow": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "scoresEqual": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "source": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "summary": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "verdict": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "zScore": {
                      "type": [
                        "null",
                        "number"
                      ]
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-11-01T23:26:34.394Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-11-01T23:26:34.234Z"
    },
    "resource": "https://grades-calc.x402tookit.com/percentile-rank",
    "serviceName": "Grades & Study Calc",
    "tags": [
      "grades",
      "percentile",
      "rank",
      "class"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Percentile rank of a score in a class list (mean-rank method), with rank from the top, mean, median and z-score."
}

What the leaf hashes

{"body":"a65822acb3b9185d5338e9de7f11804c4e3a63e43256ba42f72159b9a4f57875","id":2201774,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646808856332,"prev":null,"subject":"x402_bazaar:https://grades-calc.x402tookit.com/percentile-rank","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. 0x2b7358407e3b0dc811a50eda258cdcff6fd04e739d56a230960a675b9f8bd8d5
2. 0x1949007c0862b0c8a36d39be9f8ae74c729c44b60c258c9aab494969c88471dd
3. 0xb67ef39bf48f0bb7d30c06a31bd17333600d785c221c184fa5e52520aec4164a
4. 0x1bf6ce7a9edd6cc322f0f99803b42e956d8f2c22bf9219305c697f26e8b7c16b
5. 0xebc9ed0407b90fe2611132699edd2dfa753f6f295ecc405575bc0cd0caacf47d
6. 0xe00a0e42c97e0dafd4b59eef4eb0df9e1c981d4408814c4945d4ad5fefdeaf0c
7. 0x076b708398e00b49096650e44b7e3c5e8f05065daa3d6c81c61beed5315e8ebc
8. 0x154c732feb8dd84a951664b503cdf5dddbbddb7dd936514c6c1c83995fde3705
9. 0xc7a71b9e1da7070ed67ca72e668fbbe2bef54e3b9d098e758bf90f298c431dbf
10. 0xf56080b69bacf60fa2716022266d098d7955598998243f857dd19bd036c5575e
11. 0x8e6feec569a9685c68f59ce2b7ddb7565142c8a86a928fc54491abdad75494cf
12. 0xe190d3e775cf157368fa6ec6b0e77b39fa82005076265ca0fc15ff428080d4a8
13. 0xdb8f582c0e06dcc12f31eb42bfcf649e95cea3ce20a525db7917ecfd954357bb
14. 0x037a66c2ea899586d58b52761f6b950a97cda22bb80294e40013ebea171a684f
15. 0x9cb76be6423133397c3da69f801d6af35dcce77b458aa17bd796c877ed7bc8fd
16. 0xd42916b5c6441e9c8d91ff91715af1489cb83dee26d47e7da107caa4d2a68b65
17. 0xa20b9be86af7d690e040c9060a373b2fc5498edf3432f43c26f74fa2febc1e9a
18. 0x050f2978b537f7afb21ee1551577cdf146d1c56f4df12d24315ae5e69366b0a4
19. 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af