Evidence row 65497

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://api.cardhedger.com/v1/agent/cards/fmv-by-cert"
    ]
  ],
  "name": "Card Hedge",
  "owner_address": "0x7d823000ff75d1ac97853309042bc9ad3c7c094c",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 60,
        "network": "eip155:8453",
        "payTo": "0x7d823000ff75d1ac97853309042bc9ad3c7c094c",
        "scheme": "exact"
      }
    ],
    "description": "Get the Fair Market Value (FMV) for a card by grader certificate number.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "cert": "50000000",
              "grader": "PSA"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "card": {
                "card_id": "1699670576265x928796749151534600",
                "category": "Baseball",
                "category_group": "Sports Cards",
                "description": "C.C. Sabathia 1999 Bowman Chrome Baseball",
                "image": "https://942284f33c575895b4be9de571ca6e40.cdn.bubble.io/d112/f1699670857725x475053799924132860/resized_20231111_024737.jpeg",
                "number": "344",
                "player": "C.C. Sabathia",
                "set": "1999 Bowman Chrome Baseball",
                "set_type": "Bowman Chrome Baseball",
                "variant": "Base"
              },
              "card_source": "gemrate_id",
              "cert_info": {
                "cert": "50000000",
                "description": "1999 Bowman Chrome C.C. Sabathia 344",
                "gemrate_id": "25783324b9710f1366ca4d54f3dd4689c02b6885",
                "grade": "PSA 10",
                "grader": "psa",
                "universal_gemrate_id": "25783324b9710f1366ca4d54f3dd4689c02b6885"
              },
              "fmv": {
                "confidence": 0.3499,
                "confidence_grade": "C",
                "fmv_sample_count": 3,
                "fmv_window_days": 7,
                "freshness_days": 1,
                "grade_label": "PSA 10",
                "grade_value": 10,
                "index_truncated": false,
                "method": "direct",
                "price": 416.25,
                "price_explanation": "Used 7d FMV ($416.25, Winsorized median of 3 daily prints) in place of latest_price $416.25. Fresh (1d) — no movement adjustment applied.",
                "price_high": 435.24,
                "price_low": 397.26,
                "provider": "PSA",
                "raw_price": 416.25,
                "support_grades": 1
              }
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "cert": {
                      "description": "Certificate number to look up",
                      "type": "string"
                    },
                    "grader": {
                      "default": "PSA",
                      "description": "Grading company (defaults to PSA)",
                      "type": "string"
                    }
                  },
                  "required": [
                    "cert"
                  ],
                  "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": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-19T16:13:31.145Z",
    "quality": {
      "l30DaysTotalCalls": 3,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-19T16:13:25.641Z"
    },
    "resource": "https://api.cardhedger.com/v1/agent/cards/fmv-by-cert",
    "serviceName": "Card Hedge",
    "tags": [
      "sports-cards",
      "trading-cards",
      "pricing",
      "card-data",
      "fmv"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Get the Fair Market Value (FMV) for a card by grader certificate number."
}

What the leaf hashes

{"body":"8ec4883de33a3fd2d3864c4c1afd0c8034bc46e35f75e825419561e55992b5bd","id":65497,"kind":"listing","method":"baseline/1","observed_us":1793025458514476,"prev":null,"subject":"x402_bazaar:https://api.cardhedger.com/v1/agent/cards/fmv-by-cert","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. 0xf4e95170fab24d8fa78c1a9e939dd1e040a95d2e1423807b47a130e4d5edd563
2. 0x190aa0627e76ceb6a681bc875d8c77c886c94b6b318fce3cfa66013b3d3be4c2
3. 0xedde9d1b7146693a5a1a429956f7e36016e723e4c1b1ef8126c25476764064c6
4. 0x920300c1f9258fc91bd80d006828f6dab9b4258cc7699b79afa3731000d835f3
5. 0x0edf5966ad2cff8d15ee84556be1fe939e1c3472df29aebe07c9570fc5452581
6. 0x5ca0cd546e784bbe99585a0f22e6a500982ab06a0d4e5f3da2ed71c240e47733
7. 0xe2e440320e077922d971c3e5162c5c5e05539ae142fbaf71297d4ca55101cdc5
8. 0x7efcc079e4c79490657a21d2dade6bc756ec01873e0b9569f2e820ac010cdfee
9. 0x60cc54c8c7fef3a86f858bd19cfe0791e7d127c201e2901a94201e2db3b00c33
10. 0xf7bdc34efb83dc5cbbcb5071558fe87a477728e005b9d180c492e090371b2357
11. 0xd1f6cbd0d3ee44ebe2e23b42e7f1822bbdf0afd342375323b5d4f8bc89cd943a
12. 0x86ae35463d854f3938d986999aa8497e14f0ba2aa6f39a269e1e6d1134f9b847
13. 0x79695e4356ea25a2b58265a824698704cd2c743099ce2dca9e41384ce8f1a8c5
14. 0xd769d41500075835c3b2f9184d223699fb983fd05c29fbcb44d964abc7ee380d
15. 0x68d296b1e00b4899fb83c3fba36fffaefa311eac2903067dbebfe776a12b4a9a
16. 0x5fb5dda563336cd1bc1b9f44c52b76237ae72ed2145cb9290f39f304ca7dd678
17. 0x74a0a08e4e7ab9aa5bfbead33dec7e1c7e8e364cff69a63720d764bbe987aadc

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae