Evidence row 566809

What was observed

{
  "count": 4,
  "tools": [
    {
      "description": "Whether a date is a business day in a country (holiday/weekend/make-up workday aware), plus the previous and next business day. Costs $0.001 USDC on Base via x402.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "country": {
            "description": "ISO alpha-2",
            "type": "string"
          },
          "date": {
            "description": "YYYY-MM-DD",
            "type": "string"
          }
        },
        "required": [
          "country",
          "date"
        ],
        "type": "object"
      },
      "name": "business_day"
    },
    {
      "description": "Date that is N business days after (or before, if negative) a start date in a country. Typical use: T+2 settlement, SLA and filing deadlines. Costs $0.002 USDC on Base via x402.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "country": {
            "description": "ISO alpha-2",
            "type": "string"
          },
          "date": {
            "description": "Start date YYYY-MM-DD",
            "type": "string"
          },
          "days": {
            "description": "Integer -260..260",
            "type": "integer"
          }
        },
        "required": [
          "country",
          "date",
          "days"
        ],
        "type": "object"
      },
      "name": "business_days_add"
    },
    {
      "description": "Number of business days in [start, end] inclusive (max 3 years), with the holidays that fell on weekdays. Costs $0.002 USDC on Base via x402.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "country": {
            "description": "ISO alpha-2",
            "type": "string"
          },
          "end": {
            "description": "YYYY-MM-DD",
            "type": "string"
          },
          "start": {
            "description": "YYYY-MM-DD",
            "type": "string"
          }
        },
        "required": [
          "country",
          "start",
          "end"
        ],
        "type": "object"
      },
      "name": "business_days_count"
    },
    {
      "description": "All national public holidays for a country and year, with weekend definition and official weekend make-up workdays. Costs $0.002 USDC on Base via x402.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "country": {
            "description": "ISO alpha-2",
            "type": "string"
          },
          "year": {
            "description": "YYYY",
            "type": "integer"
          }
        },
        "required": [
          "country",
          "year"
        ],
        "type": "object"
      },
      "name": "holidays"
    }
  ]
}

What the leaf hashes

{"body":"7d492182353dd767114f4cc1e27044c0a2a2625f1a202bf545819e52e68397d9","id":566809,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793138535990070,"prev":null,"subject":"494dcfa3-30e9-4d44-907c-a529e791b79f","subject_kind":"endpoint"}

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. 0x61e4c44a80a236ee2f5bb37af48a709fd5048dbddf44e020cf784e7c29a5d517
2. 0x9afdb8c24dca8580538d00afccbbd2bc5c31470ce3aca3a59e18154e50c62f5a
3. 0x15b5ab52fe601f6c42e008ac09d5f495c93aab12680261d7086e3da85e1f3fb9
4. 0x25842f91f73ad38d30f798a5c76d4a57605fffb623e0949ee0ecea35519c12f6
5. 0xf410d3cf57878d7a0fb2c5a42c941ad588b2bdb298b2239e69c56fe302ed980d
6. 0x9412fe56ace261812ee370f0ccc97d200f34eeea31cc4e7757a6d629bea5d3dd
7. 0x0a8852eb0da9427791128b6af78708be2ddd247db773e7a525ca9bbe0929ca4b
8. 0xd7aef9dd069bdadf0e13785e5e4a0c2293704a0bcce6eb54d2bb8f2fee9f85fe
9. 0xff6721e064e87c1fe893a9d0c50bc0c3570d1e7580c8dad5f44242008cd7e3b5
10. 0xb78e55e1bd364658c97fa5d15a4f4541f8e101e2510e7be83393fb03b3a0902d
11. 0xa81a051dde23e51110ae9919545b7ebf678423a44796b6dd73cba5f3e8134f16
12. 0x4fbbcb97bbe92a4202db4cfe9ed5ce98ec76cb76473d9a37a3775c708528409e
13. 0x38f17e73d675dd35d0dd4a9f0ebd22a3333bcd28f96e42d5dd126e08211ffc4a
14. 0x4277e02be0b5d91d78bc2247e37d402572474ba896c2e8f45765c8dc4e244d36
15. 0x6f00f0da417f4126951ba8ba9b7962c847e91f5c61364ad9ad47e5f979698a60
16. 0x23cf9bb4337ee8be7fcae368fd69d24c62c11fb45882127b4cd919bb96a19996
17. 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4