Evidence row 71583

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://bess-x402.onrender.com/v1/lookup/universities"
    ]
  ],
  "name": "University Lookup",
  "owner_address": "0x1129a6bb9c6165ff07fdc509c107b522ca0e1871",
  "raw": {
    "accepts": [
      {
        "amount": "2000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x1129A6BB9C6165FF07fdC509c107B522CA0e1871",
        "scheme": "exact"
      },
      {
        "amount": "2000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:137",
        "payTo": "0x1129A6BB9C6165FF07fdC509c107B522CA0e1871",
        "scheme": "exact"
      },
      {
        "amount": "2000",
        "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": "2026-10-23T12:21:11.958Z",
    "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":"e379346819a06851f3395790d2ffd655d70290fc8c0facb68e3eeb5656aba223","id":71583,"kind":"listing","method":"baseline/1","observed_us":1793025482980881,"prev":null,"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 2026-10-26 (296695 rows).

1. 0x7286bf071f4d4f7a73b28dcd1574f7e7c599ccae77ba3573838c86269d64e6f9
2. 0x5a0a286b9d9c0a58f40c516b6934354bb0744e38ffcce0e5252abd156d026a02
3. 0x80639b95a35dfd6f9786978dd317a06aecf6427fcef849e0add7e4136e8ebdfc
4. 0x3eb9318bd6e19200bd1fe5254692b4596181a3a99a9edf46f84213d541c92b22
5. 0x2be115014542537e01f4b4ee08742a9ea777a9556388d03a6114d7d170e01a33
6. 0xa7ba5e8a0a240292fdcb17d26ecde3047ac2ad5d14b6a68ddd165df593646148
7. 0x9d4ed091ade3da8d2d8936959b89435b9aef8e4ec79806258c8e4ecfad5ce581
8. 0x0070498ea88da9b305db0cba73bfeebda3a261d7458b33b86760e0a7e886a44d
9. 0xa49cea6f6b521519a07a923a456a871b4b1d428b94bda9ba6edc2ade540cba06
10. 0xfec618220a4577d4063b5b2d1736f3db0d758d4b39800128bc55fe3318ff8373
11. 0x9763a000e2506d3e18d36911968fe32044769ec0822949b880df4736389d3536
12. 0xef1802ec08c5a2efaca6aadccc58edcebeb620a019383dc0785f198c677a9427
13. 0x06064dc1eb2363bec8c2a752e0a28aafc4bf0cb21d1b1b755821c1575bb77a96
14. 0xc4fe2177880ea1b0e82b6fe4c270090fd0fbe5af3a42a8cbf6a6ba2fa35625f6
15. 0x15039087bf60ae9b06b756ec3cbc299760e59923a438bbd91e34d105186db0ed
16. 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae