Evidence row 407513

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://foundations.tensegrity.works/mcp/search"
    ]
  ],
  "name": "Foundations Elements",
  "owner_address": "0x955012ddc5c9b7f86ad8d48f3f26d61bdbc899a9",
  "raw": {
    "accepts": [
      {
        "amount": "20000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxAmountRequired": "20000",
        "maxTimeoutSeconds": 60,
        "network": "eip155:8453",
        "payTo": "0x955012ddC5c9b7F86Ad8D48F3F26d61BdBC899a9",
        "scheme": "exact"
      }
    ],
    "description": "Foundations Elements search",
    "extensions": {
      "bazaar": {
        "info": {
          "discoverable": true,
          "input": {
            "method": "GET",
            "queryParams": {
              "kind": "charts",
              "q": "funnel"
            },
            "type": "http"
          },
          "output": {
            "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": {
                    "kind": {
                      "type": "string"
                    },
                    "q": {
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      },
      "waitlist": {
        "info": {
          "action": "signup",
          "label": "Request Elements access",
          "url": "https://tensegrity.company/elements?utm_source=x402&utm_medium=api"
        },
        "schema": {
          "properties": {
            "action": {
              "const": "signup"
            },
            "label": {
              "type": "string"
            },
            "url": {
              "format": "uri",
              "type": "string"
            }
          },
          "required": [
            "url",
            "action"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-27T03:19:02.78Z",
    "quality": {
      "l30DaysTotalCalls": 4,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-26T09:45:22.241Z"
    },
    "resource": "https://foundations.tensegrity.works/mcp/search",
    "serviceName": "Foundations Elements",
    "tags": [
      "ui-catalog",
      "agents",
      "x402"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Foundations Elements search"
}

What the leaf hashes

{"body":"9667a6958f07876785a5b2147cec936c9e668b8c6d50b4d7a6283d934e2525e2","id":407513,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793080249005560,"prev":17313,"subject":"x402_bazaar:https://foundations.tensegrity.works/mcp/search","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. 0xb9c9023af0dac339a8c9e4577428413e788de1f02c6ba5052c27e4bedf4d7b5c
2. 0x428def6a2995d9375a93ffb454c3f106c34878a5ac9aeaf4ba9ffa0bdf61e8b7
3. 0xc3418f470316cc77736951b4530b55fd03b35fc0e98ba8dea3add387577cde94
4. 0x4588b3cf4c16256e8080668ab5571d4127c6c0b7f8f57028cfb4a2aaeb369d72
5. 0xe94f79f3679ff5d04b84172b4d73013ec3f726b139df26511bf1e6bee1ffb0ec
6. 0xdf0e0861242c866c9f53af93a8c66cac27df3645dfa68f0909be30fc43f21344
7. 0xfd959110a6aecf98fe70c0093bd8b312550db56659ac7a1a92819f0fe99b4560
8. 0xd3bed4a591394fecdce445a98a5418f6d8bc74e476017921458a240ea81b0746
9. 0x6f47c1a7ce8c309528fcfffe463d692f28b5d2c5184f04cc4661f22a657b21c9
10. 0x730869a7dc51342f72c789942aa86a110afac1501602c6e93c62bbc049a3958e
11. 0x93dab4db8f250e193cce0d5bacbda4b45df3b3ee694710f7912415742bb36e56
12. 0x159edcfdd12b3eacd95b92f307695c8c00010beadbfcbf272edb59cfef54fb40
13. 0xa4f69e2cf941a3f318d70734b59401dd27010a6bdffb5c32a28304db650a6f0b
14. 0xa453d1738637a5c663802d07ce095aa340c80d53a4288ae277a72e265868ce4e
15. 0x73341bb09dd901ca47f26173883431496e3d98d6b0fb5b89f36218126d46c5d4
16. 0xa94627de1af0e823832e05a9069b304ecccb8c0cdb8f9cfc4f2039bfb9799dc5
17. 0xdf1105afdc109de3c09a98fc8a3864159ad964e6f49b635c105a27a1e1f14310
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4