Evidence row 266820

What was observed

{
  "count": 2,
  "tools": [
    {
      "description": "Public holidays, tax-year dates or daylight-saving switches for one country in 2026–2028, from the official lists and statutes. kind=holidays (uk, us, de, fr): every public holiday of the year with its date and weekday, by region — UK nations (england-and-wales, scotland, northern-ireland; substitute days flagged), US federal (statutory date plus OPM's observed date when it falls on a weekend), German Länder by code or name (nationwide = the nine bundeseinheitlichen Feiertage; partial holidays carry their scope), French metropole or alsace-moselle. kind=tax-year (uk, us, au, in, ca, de, fr, br, pl): the personal tax year's start and end with the periods for 2026–2028 and the statute or official page quoted, plus the government fiscal year where it differs. kind=dst (uk, de, fr, us, au, br): the statutory rule and the computed clocks-forward and clocks-back dates per year, with the states that observe it for Australia and observed:false for Brazil. Country names, UK nations, German Land names (Bavaria, Sachsen) and kind synonyms (bank holidays, financial year, clocks) resolve; no country lists everything covered; unknown countries, regions and years answer covered:false with the nearest matches. Entries that could not be re-verified against an official page carry nonOfficial: true.",
      "inputSchema": {
        "properties": {
          "country": {
            "description": "one of uk, us, de, fr, au, in, ca, br, pl, or a name (United Kingdom, Germany, Bavaria resolves to de with region BY); omit to list",
            "type": "string"
          },
          "kind": {
            "description": "holidays | tax-year | dst (synonyms accepted: bank holidays, financial year, daylight saving)",
            "enum": [
              "holidays",
              "tax-year",
              "dst"
            ],
            "type": "string"
          },
          "region": {
            "description": "UK: england-and-wales | scotland | northern-ireland; US: federal; Germany: nationwide or a Land (BY, Bayern, Bavaria, …); France: metropole | alsace-moselle",
            "type": "string"
          },
          "year": {
            "description": "2026–2028; holidays default to the current year, tax-year and dst to all years covered",
            "type": "integer"
          }
        },
        "type": "object"
      },
      "name": "calendar_facts"
    },
    {
      "description": "The next public holiday strictly after a date (default: today) for uk, us, de, fr, with its name, date, weekday and days until it, the three that follow, and any holiday falling on the date itself; by region as for calendar_facts (UK nations, US federal with OPM's observed date deciding the order, German Länder, French zones). The data runs to the end of 2028; a later date answers covered:false with the last date covered. From the same monthly snapshot of the official lists, with the list's URL as source.",
      "inputSchema": {
        "properties": {
          "country": {
            "description": "one of uk, us, de, fr, or a name",
            "type": "string"
          },
          "from": {
            "description": "ISO date YYYY-MM-DD; the next holiday is the first one after this day (default: today)",
            "type": "string"
          },
          "region": {
            "description": "as for calendar_facts (default: england-and-wales, federal, nationwide, metropole)",
            "type": "string"
          }
        },
        "required": [
          "country"
        ],
        "type": "object"
      },
      "name": "next_holiday"
    }
  ]
}

What the leaf hashes

{"body":"8c332400ba1775b02135ae8d73a1d51b66c2680313d95464b22daac383453a29","id":266820,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793035549544576,"prev":null,"subject":"51c0f482-f610-4c2c-bb88-22e49aec5845","subject_kind":"endpoint"}

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. 0x86f782671c9761514b002d8787bb93b8ab6e513922f9ac94dcc65eeb878747b8
2. 0xaedf5031f83dbe8e142086218e43d800eb15c7775de8a6cbc212700fd8161371
3. 0x2ee21a8aa66f5906ad2e0f7a8b3d4c9ff865fbc741d2042f7be4f48f299535aa
4. 0x103867295ee81c5ff9476d739f1ecc4ff0024bb517adfa7b75fcc574d731e0fa
5. 0xc8f88b05337c0429a0f33eff691580dea7aff751732a5f2f364d911bd592870f
6. 0xb137259c58a44be2c67f8c29a2ed92d8ea7d22b43c051112e6ebe059000af370
7. 0x245b4030b264028d704f9fac915b8bb4461f978da7f013d2bcc32b512e86b82c
8. 0x1e6c7446da1a20eeac24d71b08531e3f9588b266747ecc91feb3da21c8e9ab4f
9. 0x316b16e8cde5db385fd76b89652bf04bd954b1948a70656e6b94751f66716f63
10. 0xfdf107aa7e93af826b3c8955b5f09469f1ffacb9f1e76e1b4fabeb215b3414b7
11. 0xaa315896c61e14116f01ecf0dd5aec1ebbd01bc8562fed10b0a3e3dd6bce0924
12. 0x099dd43573993f2a1bea674129b7ed050429a0ac76c3bfda8aaf82a3af126469
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