Evidence row 75667

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://fx-reference-rates.mick8511.workers.dev/rate"
    ]
  ],
  "name": "fx-reference-rates.mick8511.workers.dev/rate",
  "owner_address": "0x6f762720b8515b7091e6aa69e8361f7b9909233f",
  "raw": {
    "accepts": [
      {
        "amount": "3000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x6f762720b8515b7091e6aa69e8361f7b9909233f",
        "scheme": "exact"
      }
    ],
    "description": "Currency exchange rates from the European Central Bank's official euro reference rates: convert an amount from one ISO 4217 currency to up to 30 others, today or on any date in the last 90 days. Cross rates computed via EUR.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "amount": "100",
              "from": "USD",
              "to": "GBP,JPY"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "amount": 100,
              "converted": {
                "GBP": 79.324238,
                "JPY": 14982.144492
              },
              "date": "2026-10-14",
              "disclaimer": "These reference rates are for information purposes only and are published free of charge by the ECB at https://www.ecb.europa.eu/stats/policy_and_exchange_rates/euro_reference_exchange_rates/html/index.en.html. Cross rates are calculated from ECB euro rates and are not official ECB rates.",
              "from": "USD",
              "note": "Latest available ECB reference rates (2026-10-14). ECB reference rates are published around 16:00 CET on TARGET working days. Cross rates are calculated via EUR.",
              "rates": {
                "GBP": 0.79324238,
                "JPY": 149.82144
              },
              "source": "European Central Bank euro foreign exchange reference rates",
              "source_url": "https://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml",
              "to": [
                "GBP",
                "JPY"
              ]
            },
            "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": {
                    "amount": {
                      "description": "Optional amount to convert (default 1)",
                      "type": "string"
                    },
                    "date": {
                      "description": "Optional YYYY-MM-DD within the last 90 days; non-publication days use the most recent prior ECB date",
                      "type": "string"
                    },
                    "from": {
                      "description": "Source currency, ISO 4217 code, e.g. USD",
                      "type": "string"
                    },
                    "to": {
                      "description": "Target currency or comma-separated list (max 30), e.g. GBP,JPY",
                      "type": "string"
                    }
                  },
                  "required": [
                    "from",
                    "to"
                  ],
                  "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": "2026-10-24T09:44:22.726Z",
    "quality": {
      "l30DaysTotalCalls": 4,
      "l30DaysUniquePayers": 4,
      "lastCalledAt": "2026-10-24T09:44:22.576Z"
    },
    "resource": "https://fx-reference-rates.mick8511.workers.dev/rate",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Currency exchange rates from the European Central Bank's official euro reference rates: convert an amount from one ISO 4217 currency to up to 30 others, today or on any date in the last 90 days. Cross rates computed via EUR."
}

What the leaf hashes

{"body":"b7ba79074e8fe7dc6aaa9a7e4bdff06f55eed1eaddd6a44fc89a5fda3452c273","id":75667,"kind":"listing","method":"baseline/1","observed_us":1793025490964465,"prev":null,"subject":"x402_bazaar:https://fx-reference-rates.mick8511.workers.dev/rate","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. 0x88645103c8e39218dee001b8d40bf24b0be673c0d1df65efbc1ef1063c7fd07c
2. 0xea8871da86dbc3a3cb6c8e4ce9b468cb3fa742b7649cbc184712f17e818dc1dd
3. 0xfbf7a8d82d130de489343680d0616d754b4191b68b1e6ad4f2ad1264b20f0686
4. 0x4d35a1dbbe47cbb1ab847e405900b277b4d213fc2536823396338e6100cad975
5. 0x5c35a71d9d4d9aeec50a77b2a2f98ea526c804a0b206f4cee148427f23aba800
6. 0xc8f216ec1d1f4f7bb745b490f8da6283a03b468a2c0d8502688ddf917c26ce51
7. 0x7ad6ee08129b5d9e0d8797793970314df5766a51815bc61ee72cf63bb89a57e1
8. 0x608f9eb3ff9331c6286b7ec283ea452c9ef2899fd54b904e8ca1eec0959c09e6
9. 0x14c6f091b2b6d3e423db7bdf1dd24bedab7abb68b4deade5ed6b4cad54a8d8cf
10. 0xb7586af46bfddb2ee3fc0eb75ae3d787275fe8ca92d7e23797abbeb88c292ae9
11. 0x8c20bf7d4b3dd52508d554a379143f96b80b2bc0af227c0b1ce2e34d99c6430b
12. 0x7bf2d426bb827b94d7608055662cf2e3f09791e1a4c2c6bd606c0a9e89b18e59
13. 0x49d11be052a4c069b10250aaba214f566b3f2e5aaa7a98e82ccc6a71c0e801a0
14. 0x78ac2b34737774659a6a411f4d10b8ba570d40699d9f277321c3a32ff03d1dc9
15. 0x7eb603d37f0f22dae1ea013e391889906ffc0139ff26e25b044bee38eec8f9b2
16. 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae