Evidence row 408452

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://bess-x402.onrender.com/v1/lookup/universities"
    ]
  ],
  "name": "University Lookup",
  "owner_address": "0x1129a6bb9c6165ff07fdc509c107b522ca0e1871",
  "raw": {
    "accepts": [
      {
        "amount": "3000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x1129A6BB9C6165FF07fdC509c107B522CA0e1871",
        "scheme": "exact"
      },
      {
        "amount": "3000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:137",
        "payTo": "0x1129A6BB9C6165FF07fdC509c107B522CA0e1871",
        "scheme": "exact"
      },
      {
        "amount": "3000",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:42161",
        "payTo": "0x1129A6BB9C6165FF07fdC509c107B522CA0e1871",
        "scheme": "exact"
      }
    ],
    "description": "Universities worldwide by name and/or country, with official websites and email domains. Use to verify academic email addresses, fill forms or build education lists.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "country": "United Arab Emirates",
              "name": "technology"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "count": 5,
              "matched": 5,
              "source": "Hipo university domains list",
              "universities": [
                {
                  "country": "United Arab Emirates",
                  "country_code": "AE",
                  "domains": [
                    "dubai.rit.edu"
                  ],
                  "name": "Rochester Institute of Technology, Dubai",
                  "state": null,
                  "websites": [
                    "http://dubai.rit.edu/"
                  ]
                },
                {
                  "country": "United Arab Emirates",
                  "country_code": "AE",
                  "domains": [
                    "ku.ac.ae"
                  ],
                  "name": "Khalifa University of Science, Technology and Research",
                  "state": null,
                  "websites": [
                    "http://www.ku.ac.ae/"
                  ]
                }
              ]
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "country": {
                      "description": "Country name in English",
                      "type": "string"
                    },
                    "limit": {
                      "description": "Maximum number of results (1-100)",
                      "type": "integer"
                    },
                    "name": {
                      "description": "Name or part of it",
                      "type": "string"
                    }
                  },
                  "required": [],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-27T04:28:23.936Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-23T12:21:11.739Z"
    },
    "resource": "https://bess-x402.onrender.com/v1/lookup/universities",
    "serviceName": "University Lookup",
    "tags": [
      "universities",
      "education",
      "email-verification",
      "lookup"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Universities worldwide by name and/or country, with official websites and email domains. Use to verify academic email addresses, fill forms or build education lists."
}

What the leaf hashes

{"body":"95de0164cddf74741b9d877ca8a2ad4a880d42ffed6bd42fd4f36289b26c1999","id":408452,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793080303460204,"prev":71583,"subject":"x402_bazaar:https://bess-x402.onrender.com/v1/lookup/universities","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. 0x56a64abf45747b18ea048e90f148d11bf99d0abe3d62e06301cf8b7948de8fa3
2. 0x5b74313037647166ca6bf44c5cbab7912d940f18f1820e85dddf3f02ba0cb3af
3. 0xc91a199210385b02994a966e6df5af64b5ff936cf2add821d220afcae8df5100
4. 0x6385a4be56a8d8f303c3632af0999d2734940baee3c4cf8e1a1dfd13ec9d8017
5. 0x9a7e1546a2415324dffea8ee5c10cd257555501a98a56c2d99868e3487c544e7
6. 0xfb12176033cd18e87aaff96c1e0354ff53aaf06fd0120fb7b14edeb08e22cee7
7. 0x239a5fa5b39e53451c677c3521f8eb3241ce9eaf7b5c2ba8f8b4b8e3cad0aba8
8. 0x766ea77190106929beeb8e9779ff1cd7d509a25fd03c3bdad33394f25730f1ec
9. 0xcc4002c8175aa2376f2eae47758ec37537ca6601d99374863f2e42f106a86c0c
10. 0xc69bdb44e5c6b8cf371784b0313363ac72c0c8b7cf2a10203966cbe3857fc7a6
11. 0xaec8530a2e156f659d0929b3462a514a0cf7d2e6669110bb34b6ef56abdae9fd
12. 0xe06cb1b692af263d62f5739bc4ad709ffe5a2576ef5a59a1610d50c03c7b9584
13. 0x906b5f0e8ef1fe7894886d84f460bb3239d5f14b14ad4adff27c7dcea6265169
14. 0x674bc1173d39130be4d15bbfc7327f8a8af87eb251e54c8d4409c7e840b9e538
15. 0xb78ea6a255dd06e2f402a1a733bca392fa6243920bcba95e8b80bdfc6ce5f553
16. 0x3ed50f053eca72dfd3a9d45a11935240bfe691e57835c367ddebe2cbc49efe9d
17. 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4