Evidence row 72317

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://chess402.vercel.app/api/puzzle/daily"
    ]
  ],
  "name": "chess402.vercel.app/api/puzzle/daily",
  "owner_address": "0xfbd46201267609ad3c66bd1b99b7f1cc80b1852f",
  "raw": {
    "accepts": [
      {
        "amount": "1000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xfbd46201267609ad3c66bd1b99b7f1cc80b1852f",
        "scheme": "exact"
      }
    ],
    "description": "Today's Lichess daily puzzle: source game, themes, initial position, solution moves, and rating.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {},
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "game": {
                "id": "exampleId"
              },
              "puzzle": {
                "id": "exampleId",
                "rating": 1500,
                "solution": [
                  "e2e4",
                  "e7e5"
                ],
                "themes": [
                  "mateIn2",
                  "short"
                ]
              }
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "$schema": "https://json-schema.org/draft/2020-12/schema",
                  "additionalProperties": false,
                  "description": "No parameters required. Send `{}` or an empty body.",
                  "properties": {},
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST",
                    "PUT",
                    "PATCH"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "$schema": "https://json-schema.org/draft/2020-12/schema",
                  "additionalProperties": {},
                  "description": "Daily puzzle response.",
                  "properties": {
                    "game": {
                      "additionalProperties": {},
                      "description": "Source game for the puzzle.",
                      "properties": {
                        "id": {
                          "description": "Lichess game id the puzzle was extracted from.",
                          "type": "string"
                        },
                        "pgn": {
                          "description": "PGN of the game up to the puzzle position.",
                          "type": "string"
                        }
                      },
                      "required": [
                        "id"
                      ],
                      "type": "object"
                    },
                    "puzzle": {
                      "additionalProperties": {},
                      "description": "Puzzle metadata and solution.",
                      "properties": {
                        "id": {
                          "description": "Puzzle id.",
                          "type": "string"
                        },
                        "initialPly": {
                          "description": "Ply count at puzzle start position.",
                          "maximum": 9007199254740991,
                          "minimum": -9007199254740991,
                          "type": "integer"
                        },
                        "rating": {
                          "description": "Puzzle difficulty rating.",
                          "maximum": 9007199254740991,
                          "minimum": -9007199254740991,
                          "type": "integer"
                        },
                        "solution": {
                          "description": "Sequence of UCI moves that solve the puzzle.",
                          "items": {
                            "type": "string"
                          },
                          "type": "array"
                        },
                        "themes": {
                          "description": "Tactical themes labeled on this puzzle.",
                          "items": {
                            "type": "string"
                          },
                          "type": "array"
                        }
                      },
                      "required": [
                        "id",
                        "rating",
                        "solution"
                      ],
                      "type": "object"
                    }
                  },
                  "required": [
                    "game",
                    "puzzle"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-25T21:59:11.118Z",
    "quality": {
      "l30DaysTotalCalls": 7,
      "l30DaysUniquePayers": 6,
      "lastCalledAt": "2026-10-25T21:59:10.947Z"
    },
    "resource": "https://chess402.vercel.app/api/puzzle/daily",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Today's Lichess daily puzzle: source game, themes, initial position, solution moves, and rating."
}

What the leaf hashes

{"body":"21f6d0c075e0eca926283baa8d2bc58d75018438cec9629c4511499a95f952df","id":72317,"kind":"listing","method":"baseline/1","observed_us":1793025485629540,"prev":null,"subject":"x402_bazaar:https://chess402.vercel.app/api/puzzle/daily","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. 0x71581ecc2cd74d6f864f10fb755868ade9b5fe1b4f7a5125f38e0d660b0c94ed
2. 0x29f41cbf8a1ea54e93e7a78effc02a445f657b0e7ce0c80e04fb6383430cad9f
3. 0xc4decbb26fbfa67ed84ef2d1e05b59f7facffd3359661c3e425650d9ba0537b5
4. 0xf5465298b4bee5733c829b1da86f8e6dacd767cd1fcd7b28aeda9a4648fa8928
5. 0xb7e9e463bcee92c3c0b4b71522dc17ab12137458a67c8af2fc8ecf3899f13744
6. 0x9b9b227aaba170363325b5e9f77acec2c0eebe32facf49ce47db9d58036f75c2
7. 0x0cd47032a667bb218f6b708f83672e322e9cf72e3f1bc40c3c709e5340f6a401
8. 0x0bbeafae308e97935b1912550a76ce5364f89bca8391d3a4c34f060ac2c2343b
9. 0xe3cd934fdc098dd7ad70511a39f0148d785d2032abeccffab7306ace781776f5
10. 0x0713a0ebeb53a78275d9103be9f6ca1687f13b61cbba8f146f9ef3faf529dde5
11. 0x170ddfc94752b8644bb33b281e6fa15e2037a7340325b12b704591a5bd5381b4
12. 0xef1802ec08c5a2efaca6aadccc58edcebeb620a019383dc0785f198c677a9427
13. 0x06064dc1eb2363bec8c2a752e0a28aafc4bf0cb21d1b1b755821c1575bb77a96
14. 0xc4fe2177880ea1b0e82b6fe4c270090fd0fbe5af3a42a8cbf6a6ba2fa35625f6
15. 0x15039087bf60ae9b06b756ec3cbc299760e59923a438bbd91e34d105186db0ed
16. 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae