Evidence row 1508286

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": "2026-10-30T21:41:17.75Z",
    "quality": {
      "l30DaysTotalCalls": 6,
      "l30DaysUniquePayers": 4,
      "lastCalledAt": "2026-10-30T21:41:17.361Z"
    },
    "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":"386760b78c086249179aaf07ae1b2e41a5641d26946b567c84161483e96dcc3b","id":1508286,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793472709233157,"prev":1262310,"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 2026-10-31 (246033 rows).

1. 0x70a01eaa7d138309d9cea8f4f2bbbca8f34f45e0a4ee13af8720dc9066d8c652
2. 0xfc7f03f0702f402db5c48d2462ff32e404b0d08e143d35abc75cfbb9c7535a15
3. 0xf7237d0726ab4349bff8a21ea8f5526499a2925197fc959253f265d3b987925c
4. 0x19461b8fa9e26ddf0df0b6c4f00deae2a556bbb5b2e4506d361f972618b37d65
5. 0x8c3d9a51d2e8c95b40c77d28f60e4abdd48957232c3a6bf7f7341751658569fa
6. 0x5f1dd196c52fcf32d6f6b6e02a7f5e322a14b2427ffca23843339a73d96046fc
7. 0xe810af71ee13476553d5ae76c822f50589c7a68ffaa4ea7f6303a9f563316850
8. 0xb848984f8b2c6f81bac314c67fe3a7d5387cf313a2ba1a9eb78cb07076be8af6
9. 0x4c84ad5f7f455e87163a5662100916d1f58fd2c37bf354f2ff497e9f05208616
10. 0x3c78edae9bcc86492f84fa8e223153c7bfcf95e6108904b3a2718f4e3b24bd99
11. 0x3ed1896060dfbc5363583930eddb2e6bb1f57e9088478cc26d676cef3b55593a
12. 0xb04f28a28cb2e83f29f5069e821a64559f4b1a9fa3d35a8d9027c84d099bff4f
13. 0x22ce62f80d102d44981e7a95b28386862f9f6290fae5a802b288d50f61d0e85b
14. 0x41e1f7c43ac5b235ed2b70fcc7418dedf8f488e17dfa6d5347558c4b213497ea
15. 0xda82240eda32eeb01478d5898342fa15b35b5682549347c7a22660b37913617f
16. 0x919f237dec4df392868ab95f1d4300b185479ae64464cbc2e7385ad1fd6ab390
17. 0xa00a931d72706fa2402bfc9b441a12eb7c6a61ff42a542916106e3637177f101
18. 0x59f83f7228f07febe2780660e422e171b0359b8aa031ee3be07e991118130c15

Day root

0x24463725d1c0d9894bd6123691d532547aaa79f0762c0e45aa6a68acf1fd71ab

Chained

0x7d4824ff313dee7252a46f9d5c37b452851deb6c9f24a40c2f74ee0e53c82980

Published

On Arc Testnet, block 70093156: 0xedb7b832f4ebf6781b5ecd2ed241c435b862f4d3761541fa31adc1831b8c44a0