Evidence row 1039494

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://saylorinnovations.com/api/brazil/central-bank"
    ]
  ],
  "name": "Saylor Innovations Data Desk",
  "owner_address": "0xa2a8df0f7caabea4e120a2568118f141569fc8aa",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:datadesk:brazil-bcb",
          "name": "USD Coin",
          "note": "Base settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:8453",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:datadesk:brazil-bcb",
          "name": "USD Coin",
          "note": "Polygon settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:137",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "assetTransferMethod": "eip3009",
          "facilitatorOnly": true,
          "memo": "saylor:datadesk:brazil-bcb",
          "name": "USD Coin",
          "note": "Arbitrum settles through an x402 facilitator. Send payload.signature and payload.authorization (EIP-3009); there is no self-submitted path on this network.",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:42161",
        "payTo": "0xA2A8dF0f7CaaBEa4e120a2568118f141569fc8aa",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
          "memo": "saylor:datadesk:brazil-bcb"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "Es9vMFrzaCERmJfrF4H2FYD4KCoNkY11McCe8BenwNYB",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
          "memo": "saylor:datadesk:brazil-bcb"
        },
        "maxTimeoutSeconds": 120,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "7LSjfrJf8fNsB8VA9u7N3WEn25smQLpob3SvyUvXacy7",
        "scheme": "exact"
      }
    ],
    "description": "Brazil Central Bank Rates: Selic, IPCA, USD/BRL — Reference Data",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "count": "5",
              "series": "selic"
            },
            "type": "http"
          },
          "output": {
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET",
                    "POST",
                    "PUT",
                    "PATCH",
                    "DELETE",
                    "HEAD"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "count": {
                      "description": "optional latest observations 1-60 (default 10)",
                      "type": "string"
                    },
                    "series": {
                      "description": "selic (default), selic-daily, ipca, igpm, usd-brl, eur-brl, cdi or unemployment",
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "description": {
                      "description": "Short description",
                      "type": "string"
                    },
                    "latest": {
                      "description": "Most recent value or version",
                      "type": "object"
                    },
                    "points": {
                      "type": "array"
                    },
                    "series": {
                      "description": "Time series of values",
                      "type": "string"
                    },
                    "sgs_code": {
                      "description": "Sgs code",
                      "type": "number"
                    },
                    "source": {
                      "description": "Data source the values come from",
                      "type": "string"
                    },
                    "unit": {
                      "description": "Unit of measure",
                      "type": "string"
                    }
                  },
                  "required": [
                    "series",
                    "latest"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "json",
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1791811517/bazaar-icons/bc5e2b3d111ebbef.jpg",
    "lastUpdated": "2026-10-29T18:17:20.837Z",
    "quality": {
      "l30DaysTotalCalls": 4,
      "l30DaysUniquePayers": 3,
      "lastCalledAt": "2026-10-28T23:45:03.204Z"
    },
    "resource": "https://saylorinnovations.com/api/brazil/central-bank",
    "serviceName": "Saylor Innovations Data Desk",
    "tags": [
      "selic rate brazil",
      "ipca inflation brazil",
      "usd brl exchange rate",
      "banco central do brasil api",
      "brazil interest rate"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Brazil Central Bank Rates: Selic, IPCA, USD/BRL — Reference Data"
}

What the leaf hashes

{"body":"b95c67c73d769f9b2ca5092f516381ea74faa5b78c56d6077d7085fae3c931c7","id":1039494,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793298329933692,"prev":751568,"subject":"x402_bazaar:https://saylorinnovations.com/api/brazil/central-bank","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-29 (242798 rows).

1. 0x3060eb6583744cde50e968632066ac7d58f3914839d22dab9d862cfb2680dd01
2. 0xcb3abef7062f01829483579ded325d587f286443ab3816d72b0076c9a3e0ff3a
3. 0x15a5742d97cc02bae515d6f014e8bf28d40a9ad259c3c199fd15c16133561d6e
4. 0xf137af4604bf664019dafffd4711a26992ff6b8c4a2c3e6af1de847a270243d9
5. 0x80932a0ab45ec43011c565e65c42e130abe199bdf78a7afd034af2f9f2a87068
6. 0x2647c3f827a34f493a87e5e0bff26016f65f5de9e99104d45fe453ac8b47a52f
7. 0xbbcceda63692d77dbc3acafa6d2bba71732324916d0f7ad6ad351ba761019b2d
8. 0xf55737db1cd1bb987fb5cd2e4de7081b94037e39306af7be453754fdbce91a12
9. 0x7869b58f131feaf2117eb73b33981e493f87c1c5cfacd347a57bda2f3c6ff362
10. 0x2a94d00923ccd7d22e9744ff4df9a3cd9bb6a740b22b565181b3982abb8a8aeb
11. 0xc7966c4724bd031b58dc5793f26a63926e16d6dcaef5439651b2d76e0d9810be
12. 0x77cc691d6e181a284660f8c49d2c4b7f8c2e147cdd84b4b364121a76c825bb3e
13. 0x15a9e69ec55b3b3b0172aac34642cd2d4dd9a7825683c77c1f52fbc1dc101637
14. 0xcaae1928370ce22d2a564247e7948dcda78bb8c3ef9a7d8bdfa6e00f84c1e28c
15. 0x00268e62f7d5ca6313e0e60afdc2bd4f52c6dbdb3b4b4d27e01e634b4bcb1d2c
16. 0x1c3764b490d23b94e5ac838c89f8d3850dedb0819196f367da2479c7a88bf2c0
17. 0xd76435ead496863d8b0bfab3434f54cd11da3c49d104fc4064b9cb3381567bbd
18. 0xd56e61af23709ed9f460471e3c08400c0142ee83e1fd9057e46350d12edf9c07

Day root

0xc050555c6b023f2aefb6536efb9f0760b92c30a0d06c572b7daf63db259ea17c

Chained

0x4cde8bae2042512e1bec11650628f0293556311cc4ea74d99ffddf02b671a7d6

Published

On Arc Testnet, block 69753317: 0x9e85c340732f416e431b111fae72f7624870125f7f379af2732eb6c2ba8cf6a1