Evidence row 2201984

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://dev-reference.x402tookit.com/http-header"
    ]
  ],
  "name": "Dev Reference",
  "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": "Explain an HTTP header: request or response, purpose, security notes, and its IANA registration status.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "name": "Strict-Transport-Security"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "asOf": "2026-10-11T14:26:45.602Z",
              "degraded": false,
              "direction": "response",
              "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
              "name": "Strict-Transport-Security",
              "notChecked": [
                "how a particular server, CDN or browser version treats the header",
                "headers invented by applications (reported as not registered, not as wrong)",
                "…1 more"
              ],
              "purpose": "Tells browsers to use HTTPS only for this host for max-age seconds.",
              "reasons": [
                "Security note: Use max-age of at least 31536000 and includeSubDomains once ready; preload is hard to undo."
              ],
              "reference": "[RFC 6797: HTTP Strict Transport Security (HSTS)]",
              "registered": true,
              "registryStatus": "permanent",
              "securityNote": "Use max-age of at least 31536000 and includeSubDomains once ready; preload is hard to undo.",
              "source": "IANA HTTP Field Name Registry (retrieved 2026-10-11); purposes and security notes written for this shelf",
              "structuredType": null,
              "summary": "Strict-Transport-Security: Tells browsers to use HTTPS only for this host for max-age seconds. (response header, IANA status permanent).",
              "verdict": "EXPLAINED"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "name": {
                      "description": "Header field name, for example Strict-Transport-Security",
                      "type": "string"
                    }
                  },
                  "required": [
                    "name"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "asOf": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "degraded": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "direction": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "disclaimer": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "name": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "notChecked": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "purpose": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "reasons": {
                      "items": {
                        "type": "string"
                      },
                      "type": [
                        "array",
                        "null"
                      ]
                    },
                    "reference": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "registered": {
                      "type": [
                        "boolean",
                        "null"
                      ]
                    },
                    "registryStatus": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "securityNote": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "source": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "structuredType": {},
                    "summary": {
                      "type": [
                        "null",
                        "string"
                      ]
                    },
                    "verdict": {
                      "type": [
                        "null",
                        "string"
                      ]
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-11-01T22:49:00.555Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-11-01T22:49:00.374Z"
    },
    "resource": "https://dev-reference.x402tookit.com/http-header",
    "serviceName": "Dev Reference",
    "tags": [
      "http",
      "headers",
      "security-headers",
      "reference"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Explain an HTTP header: request or response, purpose, security notes, and its IANA registration status."
}

What the leaf hashes

{"body":"5e8fb734276cf6a8b2d68572a37dd02feff9d703bc6877ed2248d57b7db63b91","id":2201984,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646811211297,"prev":null,"subject":"x402_bazaar:https://dev-reference.x402tookit.com/http-header","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. 0x4bff3dce7ece8ff18f625767a04aa2cfcba861a22348dbc7175acc9d6a80ab58
2. 0xf4a97ece5e150f7551ded5abf939332489e2b7ba9071315af804f044346285e0
3. 0xe924f8477f172221a65d46316db2ee6f668ba05e0adf8578fcda863b0af83b3f
4. 0x8104ce402f59410a8d4c01744489bcbb60048333dceff805fddc186d10581d71
5. 0x7b4218829005c9c3eab9c0ff27f2517bb5d1f5c7c8693d322b2724a39137426a
6. 0x7bfc0bc5ef78403b666fa206cb4efe642d87f1fedbe227ddf0ce2d6021026f84
7. 0xf3493e423fd2e160946068c4849907c62a841567849b34afebb07c67326bcc90
8. 0x69dd2ef4b11ffbf8afa240686be05fc50e64e27e8333c395a73e8289a9fc61ab
9. 0x0ed7b7640ab1e74c3a32b77ceaf8a8738c6101e41f8643cb67c7d8eda740d7a5
10. 0xd4c8f890c0add1842e854affdb74bc4a7bf09e1904df1f34ba1f640c82fb2713
11. 0x2d4bf17549b7dc371aa1c0252d8cb88bd4e60aa372a64e8d504325bb55032782
12. 0xa75340e0bbabb2f0ca98fb3825535e0c36ea9da96d1d4b1af9ca29649e0fc148
13. 0xc2ea6f7cdcf0c6904201c0d186a72f2a6fa2d355f41deec0e55aad057d5b8897
14. 0xf01d425f0c05ac504062d9b471f06fbf10480b3526efb1ee77bb71aebd05f0de
15. 0x67c99d356de30f9cfab88af48fbaa18909ef230dd09947e84da060bc03aca929
16. 0x1068659ec8f2bcf26e4ad39786557a8c45d60e5ebba4fce2fb9962b2c9c59920
17. 0xf9973981f80219d4f00fa9186b40a8144accc0c9875572fb79eaea312a21a187
18. 0x4d205063c881c48edbbb37762a8d3bbb7444d4c42daa882f663a231893d25c35
19. 0x365b161a4b68d750dcc4b3ecce1154a2163c87b08762079428e68f0ebb6a754e

Day root

0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1

Chained

0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2

Published

On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af