Evidence row 555640

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://how.is/v1/domain/email-auth"
    ]
  ],
  "name": "how.is/v1/domain/email-auth",
  "owner_address": "0xa76a0e93c5af3fd43521300b0a58ef5f70fc44f6",
  "raw": {
    "accepts": [
      {
        "amount": "5000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xa76a0E93C5af3fd43521300B0a58eF5F70fC44F6",
        "scheme": "exact"
      }
    ],
    "description": "SPF, DKIM and DMARC records and posture for a domain.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "domain": "github.com"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "data": {
                "_shape": "data.data: spf, dkim, dmarc, mx, overallScore, overallStatus, recommendations."
              },
              "receipt": {
                "charge_usd": 0.005,
                "rail": "x402",
                "settlement_tx": "0x…",
                "tool": "email-auth"
              },
              "result": "Email authentication for the requested subject"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "additionalProperties": false,
                  "properties": {
                    "domain": {
                      "description": "A bare domain name, e.g. example.com",
                      "maxLength": 253,
                      "type": "string"
                    }
                  },
                  "required": [
                    "domain"
                  ],
                  "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": "2026-10-27T19:58:50.765Z",
    "quality": {
      "lastCalledAt": "2026-10-27T19:58:50.765Z"
    },
    "resource": "https://how.is/v1/domain/email-auth",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "SPF, DKIM and DMARC records and posture for a domain."
}

What the leaf hashes

{"body":"5724badac861881e2c07cc3ad39044d2df0b0652a985c616d89b4be263f6b45a","id":555640,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793133801001210,"prev":null,"subject":"x402_bazaar:https://how.is/v1/domain/email-auth","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. 0xef37358ca531ad134bae7b2f503f9d25d815cdb5ae3828f74c4e6200b208a4ce
2. 0x7fa1245efb9c944c5e6fb2cd8f7b6371f12888b247bc9e89a63768a5ab279995
3. 0xcc17cfcdf0e924c7a46049c4689c8bfbc294be9febe960e711b400e474ceeb36
4. 0x4e23dfe6f35d61a2c25d54144c4bb5747e4619f23d4e84ec553e6ab1dd6d60cc
5. 0x4e435ffe1d7d5753e2e27d019601a8f3d9c318bc6ed01a82cd8377f7f74a3cb5
6. 0xbf1b4fadf68c6e59bd9c89dacb47251e736579bc4ea7d608c9b0a4b77fd82986
7. 0x94a42153e63ac16e893e100845a6f07d1065792077df34d0050ce83523b54db0
8. 0x34905f48dc74ddc8f9d52826c536a6fe390c37e10b451dcfe18a72476d553c2f
9. 0x930b1fcfbe4599560c2ba785ea038c4ecb71dbfac328de203327705d7df6ca65
10. 0xa2f7ee67cd3d18eb6a574f673a6de5baa7d1c805f36fc95b0d45b03af8e8f907
11. 0x1b4399bae757271424da8a4da03b907adf56af6574a865598cf68ad834ce7e01
12. 0xc0448a83784154aec794ac7a249e46b6f618529dfd246ef492240c5d9b62d921
13. 0xe0ddf3e1c8349b7fe55d4b2a6864486a77de3e3c0e371df44d69aeb837cfd79c
14. 0xce1471491ffb52101d7cd9884cca0fb37a9496f6e8250375054907d24a35d04f
15. 0x56f7109d4cde42492651beb1237c13cdcbf95e6fee2b2482391a2388e04c4629
16. 0x8745bd887f5ce9f7a49558fd2b04cdcd97a05ea9f8a23f62d0e80cb13d328b0f
17. 0xdf1105afdc109de3c09a98fc8a3864159ad964e6f49b635c105a27a1e1f14310
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4