Evidence row 2201800

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://sports-calc.x402tookit.com/elo-rating"
    ]
  ],
  "name": "Sports Calculators",
  "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": "Elo rating update after a game: win probability for each side, new ratings and the points exchanged.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "k": 32,
              "ratingA": 1600,
              "ratingB": 1400,
              "result": "win"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "asOf": "2026-10-11T14:34:06.586Z",
              "changeA": 7.6881,
              "changeB": -7.6881,
              "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.",
              "expectedA": 0.7597469,
              "expectedB": 0.2402531,
              "kA": 32,
              "kB": 32,
              "newRatingA": 1607.6881,
              "newRatingB": 1392.3119,
              "notChecked": [
                "which federation's rules apply (FIDE, USCF and others add rating floors, provisional periods and K-factor rules)",
                "that the K-factor suits the player's rating and games played",
                "…1 more"
              ],
              "ratingDifference": 200,
              "reasons": [
                "Expected score E = 1 / (1 + 10^((opponent - own) / 400)); new rating = old + K x (actual - expected).",
                "With equal K-factors the points A gains are exactly the points B loses."
              ],
              "scoreA": 1,
              "source": "computed locally",
              "summary": "A expected 76% to win, B 24%. After the result A 1607.7 (+7.69), B 1392.3 (-7.69).",
              "verdict": "COMPUTED"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "k": {
                      "description": "K-factor, default 32",
                      "type": "number"
                    },
                    "kB": {
                      "description": "K-factor for B if different",
                      "type": "number"
                    },
                    "ratingA": {
                      "description": "Player A rating",
                      "type": "number"
                    },
                    "ratingB": {
                      "description": "Player B rating",
                      "type": "number"
                    },
                    "result": {
                      "description": "Result for A: win, draw, loss (or 1, 0.5, 0)",
                      "type": "string"
                    }
                  },
                  "required": [
                    "ratingA",
                    "ratingB",
                    "result"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "asOf": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "changeA": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "changeB": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "degraded": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "disclaimer": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "expectedA": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "expectedB": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "kA": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "kB": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "newRatingA": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "newRatingB": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "notChecked": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "ratingDifference": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "reasons": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "scoreA": {
                      "type": [
                        "null",
                        "number"
                      ]
                    },
                    "source": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "summary": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "verdict": {
                      "type": [
                        "null",
                        "string"
                      ]
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-11-01T23:25:14.889Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-11-01T23:25:14.625Z"
    },
    "resource": "https://sports-calc.x402tookit.com/elo-rating",
    "serviceName": "Sports Calculators",
    "tags": [
      "elo",
      "rating",
      "chess",
      "ranking"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Elo rating update after a game: win probability for each side, new ratings and the points exchanged."
}

What the leaf hashes

{"body":"542ea776c4b6a9a9d281ebbe95be41bb1075aac10f457d448646255fd9d1cb55","id":2201800,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646808947336,"prev":null,"subject":"x402_bazaar:https://sports-calc.x402tookit.com/elo-rating","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. 0xb0b9d1845673baf5adaab366c6268fe2788f61c23dc05a7261ccd3771014f589
2. 0x3f0b0b864ca5141a47282eb375d03fdb0d6d3ed1e2f14efbe86e7acdd47da168
3. 0x424d4a8f5bb0e6edb52460b282b6f4585d0c9e3a124c0d3d3d5d0fefa97aca37
4. 0x22c4f8fab12977cf08a9641fd5972d33d4c32bba088fdfa7fa993f9ad57f6718
5. 0x1f6d5d5d0df68ad7dcac3863ca417e24c631b3dc902a0f2cfcdb3da116523f9e
6. 0xe7b5fab07a53e18530f0475865bcb947b77ea72e136051c07d0ca935b0438053
7. 0xa338a896ae926064f5b2fefb8f2459a63f657a61bb7c02944e2ed4f95923cfa7
8. 0x4fc4263b8e5c99299c78f933bd7ced74d746ef07f9111bb43900bd83ce286563
9. 0xb8556ee2381671590536034d82a731c892d7fb351c470d4bde05b10c210138e5
10. 0x79e43cf8596b3f6713305085ea27f77f1a446a089e1d473ccce0fba34fc715c6
11. 0xbd72926e70ce8b3fbd88a65517bfafaf21f027e2ff85aadf0711eb1de7ac64ba
12. 0x3f5b8a46d4602f78a712f9446b064f32836e36fd6c23e6658582d1139ccd321f
13. 0x026aca682cb5dc6926296949fd7c047905eb55f048c3a7c3bfbbb67e9d07fee8
14. 0x2f8469a138f90dfcfc93d4f817bc8f20341a871e08f629fe27a2cd40dbfeb340
15. 0x793184605629cd36ba80a07cbe115ca35e8923297bf024260c6f5c06b255f638
16. 0x2922573a524a0694086782ac45fa3083d3fc3f6a2a479b2105e1e2f06b2916f7
17. 0x07ad80c0c234ecea379a2f4450dfd0804db049dbc62abe77af6306049ca6b6c2
18. 0x98cbbf2c68ab4c0b4db782aeb88bea1f30b02178cf8b5d3d24a931d19492ea6d
19. 0x252cce55f1a3d5391c16f82d7f62494429a5f69b03486d4cfcfb7b2c96d6c884

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af