Evidence row 548727

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://api.lookproof.dev/v1/mail/ptr"
    ]
  ],
  "name": "Lookproof",
  "owner_address": "0x5be2be9f95549a2d69951d24a2b3901d1df1bc05",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x5bE2bE9f95549A2D69951d24A2B3901D1df1Bc05",
        "scheme": "exact"
      }
    ],
    "description": "Check reverse DNS for a domain's mail servers: up to five MX hosts, their IPv4 and IPv6 addresses, each PTR name and whether it resolves back to the same address (FCrDNS), with coded findings. Use when an agent must tell whether a domain's mail servers have matching reverse DNS, a common reason for rejected or spam-filed mail.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "domain": "example.com"
            },
            "type": "http"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "additionalProperties": false,
                  "properties": {
                    "domain": {
                      "examples": [
                        "example.com"
                      ],
                      "maxLength": 1024,
                      "minLength": 1,
                      "title": "Domain",
                      "type": "string"
                    }
                  },
                  "required": [
                    "domain"
                  ],
                  "title": "DomainInput",
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-27T12:40:22.232Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-27T12:40:21.927Z"
    },
    "resource": "https://api.lookproof.dev/v1/mail/ptr",
    "serviceName": "Lookproof",
    "tags": [
      "email",
      "dns",
      "deliverability",
      "ptr",
      "reverse-dns"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Check reverse DNS for a domain's mail servers: up to five MX hosts, their IPv4 and IPv6 addresses, each PTR name and whether it resolves back to the same address (FCrDNS), with coded findings. Use when an agent must tell whether a domain's mail servers have matching reverse DNS, a common reason for rejected or spam-filed mail."
}

What the leaf hashes

{"body":"0ad6654cfd16ae0f0fd39dfadc0f9bc891abe71932597f1568ae0e59b2103f2b","id":548727,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793133321524723,"prev":null,"subject":"x402_bazaar:https://api.lookproof.dev/v1/mail/ptr","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. 0x448446b5f34519f1ac3536849c38595f6ef1e9d8580b47614814def65db4c084
2. 0x2fc40741f14b02c2f253b1071f334ebc43d89b628f72b789c6143cb18baf1c0c
3. 0x92066b391d032ca390fbbbe6969ab08e1d4959e0f03fc163f4d8c20cf60c7046
4. 0x9b8275fd7b4cf7e87ceebf57d9be093dec09011fd79e6c6c4b6fc604bd70e580
5. 0x961c0ea883ec7062d7e9634dfd5e57f43d284beefbdc34ed3392b92af27d352f
6. 0xb3bf2d371d5869cb93144a910970a36e4c99d91c681eae3f5c47074ec20ec225
7. 0x515e98e9e45dcac6f633f1ff39da0a03bc4e52c018101d12d0a6695ca121b276
8. 0xa9007931ff4ce6442300b439a529a91aab70ac0f11e13cd12c2ad5694c7ab177
9. 0x1b00a0b2edbc0c69b52fe2d8c65094da00838a0de61b202de0911f1b4f5a8b7b
10. 0xac0d614ec4428c50e771eb2440f62446f95046e74c74c7bc6d7652cdfa5a4b4b
11. 0x1b9c41d141e1a02a99bdefaffd813deec26b015e7930d9ccee8d58c0345a74eb
12. 0x73ca48521d1cc492ee4ab86757972943f96dcf68a114d6383fd5e527c332af36
13. 0x4b4a1e815a33d351cc45dfa35f97aef5faf461590a54756a40dc36a0bbabf04b
14. 0x1de9caca1fa6dbbe090ee48dad5f962bbfd09856fd897edc8c3c110272d35c56
15. 0x2c117b27721eea45f6590fbccb471d21a7b0b079a53f089ecb300c63bdb3aebf
16. 0x3ed50f053eca72dfd3a9d45a11935240bfe691e57835c367ddebe2cbc49efe9d
17. 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4