Evidence row 426854

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://x402-niche-briefs.fly.dev/v1/fda-medical-device-510k-check"
    ]
  ],
  "name": "FDA device 510(k) pathway check",
  "owner_address": "0x847f54ae8ddfd71ed7bc930c1f7a73576fab03a9",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x847f54ae8dDFD71ed7bC930C1f7a73576FAb03A9",
        "scheme": "exact"
      }
    ],
    "description": "Classify device pathway: Class I exempt, Class II 510(k), or general wellness.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "device_class": "class_i_exempt",
              "sterile": "false"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "as_of": "2026-10-25",
              "disclaimer": "Educational reference and automated checklist only; not legal advice.",
              "flags": [],
              "input": {
                "device_class": "class_i_exempt",
                "sterile": false
              },
              "regulations": [
                "21 CFR 807 (registration & listing)",
                "21 CFR 820/QMSR"
              ],
              "required_elements": [
                "establishment registration",
                "device listing"
              ],
              "risk_level": "low"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "device_class": {
                      "description": "Device class",
                      "enum": [
                        "class_i_exempt",
                        "class_ii_510k",
                        "wellness_general"
                      ],
                      "type": "string"
                    },
                    "sterile": {
                      "description": "Sold sterile",
                      "type": "string"
                    }
                  },
                  "required": [
                    "device_class",
                    "sterile"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "$schema": "https://json-schema.org/draft/2020-12/schema",
                  "properties": {
                    "as_of": {
                      "type": "string"
                    },
                    "disclaimer": {
                      "type": "string"
                    },
                    "flags": {
                      "type": "array"
                    },
                    "input": {
                      "properties": {
                        "device_class": {
                          "type": "string"
                        },
                        "sterile": {
                          "type": "boolean"
                        }
                      },
                      "required": [
                        "device_class",
                        "sterile"
                      ],
                      "type": "object"
                    },
                    "regulations": {
                      "items": {
                        "type": "string"
                      },
                      "type": "array"
                    },
                    "required_elements": {
                      "items": {
                        "type": "string"
                      },
                      "type": "array"
                    },
                    "risk_level": {
                      "type": "string"
                    }
                  },
                  "required": [
                    "input",
                    "risk_level",
                    "regulations",
                    "required_elements",
                    "flags",
                    "disclaimer",
                    "as_of"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-27T02:33:20.193Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-27T02:33:20.005Z"
    },
    "resource": "https://x402-niche-briefs.fly.dev/v1/fda-medical-device-510k-check",
    "serviceName": "FDA device 510(k) pathway check",
    "tags": [
      "compliance",
      "fda",
      "device"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Classify device pathway: Class I exempt, Class II 510(k), or general wellness."
}

What the leaf hashes

{"body":"68f725a86ab5c18fcbf2cc631d7308f5af7395d0b729dddccfc0e97ea5d76386","id":426854,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793086313297338,"prev":409316,"subject":"x402_bazaar:https://x402-niche-briefs.fly.dev/v1/fda-medical-device-510k-check","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0x3ef05cb5d937757b2c8445efe98681c658e1d7acf5af17c522eef03c5702e215
2. 0x83f252a78cb496210dc6ea705e80b90b89c528758774a2aed71540ca07a61c76
3. 0xb2d853396e9ebb79b9ccaad3901f624cb913d6bd7c50d2ac35e9daa2e67a6f1c
4. 0xaf79312cee994188e06ef36355428cf09a72c078f3541f47af9e9376cddbce3e
5. 0xd7bb71326c68b1cf5350df550f5fe2ae02ada3a0e201eec3d2351e042da4e3f8
6. 0x1a6abcb04b42025d8a274e6af180251fddcc04aee9181731372a7148613eff91
7. 0x923e3bda4a875fa43ff29d2abc0a1b42c9b0b4e64967df2645940dff6fd2ddfc
8. 0xf0415d60365798f15cfcee9cd4999e8767c7f6b451820274898b24c588e1116b
9. 0x5a030fb12033043f6aecd372d65c0b4b74226e949eb9fd0cc8aeff613fb99513
10. 0x692aa1becc5dbb2897d6b9b4a673bdbb4bb4ef78091ceafa3ad72e70f0007af4
11. 0x6e6c3f9e8905b53bea3a56703a85b838b295ee8873c8ac6067caa68293188db7
12. 0x139a61fc1533aad2dd83b82b2ec2330ee3422710b28d63ce7ff509ed7d7bc93e
13. 0xe097a5c0640b3c074fef1c9f5fe91898965687ad755f1c27c31462a60e313f0a
14. 0x1de9caca1fa6dbbe090ee48dad5f962bbfd09856fd897edc8c3c110272d35c56
15. 0x2c117b27721eea45f6590fbccb471d21a7b0b079a53f089ecb300c63bdb3aebf
16. 0x3ed50f053eca72dfd3a9d45a11935240bfe691e57835c367ddebe2cbc49efe9d
17. 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4