Evidence row 266702

What was observed

{
  "count": 1,
  "tools": [
    {
      "description": "UK exam calendar dates verified against JCQ and the exam boards' own documents: results days (A-level 12 August 2027, GCSE 19 August 2027, November 2026 GCSE resits 13 January 2027, Scotland 10 August 2027), the summer 2027 exam timetable (JCQ common window 10 May – 22 June, contingency day 23 June 2027; per board — AQA, Pearson Edexcel, Cambridge OCR and WJEC/Eduqas, all final — the dates of GCSE Maths papers 1–3, English Language papers 1–2, Combined Science papers and A-level Maths papers), entry deadlines (JCQ 21 February 2027) with each board's late and very-late entry fee dates and multipliers, and announced specification changes (first-teaching and first-exam years, DfE reform timetable, Ofqual decisions). Input kind (results, timetable, deadlines, spec-changes; omitted → the listing), optional board (jcq, aqa, pearson/edexcel, ocr, wjec/eduqas, sqa, ofqual, dfe) and qualification (gcse, a-level). Every figure carries its source document, the quoted timetable row, verifiedDate (2026-10-04) and, where the board's 2026 document is still served, the summer-2026 date as previous. An unknown kind, board or qualification answers covered:false with the nearest keys.",
      "inputSchema": {
        "properties": {
          "board": {
            "description": "optional: jcq (common dates), aqa, pearson (edexcel), ocr (cambridge), wjec-eduqas (wjec, eduqas), sqa (Scotland), ofqual, dfe",
            "type": "string"
          },
          "kind": {
            "description": "one of: results, timetable, deadlines, spec-changes (omit to list all)",
            "type": "string"
          },
          "qualification": {
            "description": "optional: gcse or a-level (figures common to both are returned for either)",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "uk_exam_dates"
    }
  ]
}

What the leaf hashes

{"body":"16a5b0d402cf56643b6ea68be028be4c049f46711847032578d2e382762324b9","id":266702,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793035489584761,"prev":null,"subject":"a41fa24d-2e90-45e8-bcfb-1d3321af9ccf","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. 0x1f040a5cc37357e69080bae8a8c51c007e059a6c50c80104df247ed24d3f0809
2. 0xf960854e8765675fc22e6761d510f35d7c62ce2bc92a5ffdc58eeb504f0b67c3
3. 0x014095faa1f4497de87bf6c8ca572a60a11279a71485da29dae4bea289f364b8
4. 0x44556b8b0290b3f6bb527cd8fcf77e293d2c2be3197fa72efd2ae5c179eb2f1a
5. 0x6a0e63097785ccf44ef171a25de436e37394405520ac7e14d893e9700026fae4
6. 0x846065e6bf68e796a5a9c1d4765cee86f85ccaa8070d5863bc83c608c324b10f
7. 0xa87d040031c42425d6ad033f05841a65b4a645fb0d13f1e4a732611fd6009a71
8. 0xb12782d5d04c13e86edb6a887bb4b6f36fdb9211a42956f9ebc1bd5380963a45
9. 0x5ea005b2aad9c8979e952e284f06300a28be249aa66535acf2907a3a6fa36ae0
10. 0xef610ca79dfed4e1e00208e978a3a887d70d47190be682de5aa9a473137a32fe
11. 0x3e9f4dee30700b7fef683685ce6c4e483a5869ff14413228fe9abfbaa1a7cd3c
12. 0xbd94b9d1458901cf513783d5d2bc701e3babbcdf9219e07ee2be8fb2c897060f
13. 0x42b0d9d5b53af5b0fe99cee10ce29fe484db78b92ce49f97190cc6d098651d47
14. 0x9dfd312f3d4937f7cb144cee3987e8516f222932b4ea286605236d73cfa1ed16
15. 0xc3a6a3ae44ec0da1848b16d40c45d7aac97a67352eea8df18e0f26edabea8a2f
16. 0x06d71bfa7d8b41d62c8836efc2c601e1cc3772d9453596b2ae4950887f3310ca
17. 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae