Evidence row 567473

What was observed

{
  "count": 3,
  "tools": [
    {
      "description": "Cross-reference a carbide insert grade across manufacturers. Given any maker's grade (e.g. GC4325, KC5010, IC807), returns its ISO 513 application position(s) and the grades other manufacturers publish at the same position, each row carrying its verification status (multi-source consensus / confirmed by 2+ manufacturer charts / single-source chart). Comparable-at-ISO-position is a trial starting point, not an interchangeability guarantee.",
      "inputSchema": {
        "properties": {
          "brand": {
            "description": "Optional: the grade's manufacturer, to disambiguate codes used by several makers",
            "type": "string"
          },
          "grade": {
            "description": "The grade code to cross-reference, e.g. \"GC4325\" or \"KC5010\"",
            "type": "string"
          }
        },
        "required": [
          "grade"
        ],
        "type": "object"
      },
      "name": "grade_cross_reference"
    },
    {
      "description": "Cross-reference a workpiece material designation across standards (EN, Werkstoffnummer, AISI/ASTM/UNS, JIS) from a curated 77-material set, e.g. \"1.4404\" -> AISI 316L / X2CrNiMo17-12-2 / SUS316L. Each match includes the ISO 513 machining group, a machining note, and whether the pairing is a same-composition equivalent or a nearest commonly-cited counterpart. Always verify against the material certificate.",
      "inputSchema": {
        "properties": {
          "designation": {
            "description": "Any designation: EN name (42CrMo4), Werkstoffnummer (1.7225), AISI/UNS (4140, G41400), JIS (SCM440), or a common name (316L, Inconel 718)",
            "type": "string"
          }
        },
        "required": [
          "designation"
        ],
        "type": "object"
      },
      "name": "material_cross_reference"
    },
    {
      "description": "Starting cutting-speed and feed ranges for coated-carbide TURNING by ISO 513 material group (P steel, M stainless, K cast iron, N aluminium, S_TI titanium, S_NI nickel superalloy, H hardened steel). These are deliberately wide practice ranges, not from any one catalog; the maker's data for the exact grade always wins.",
      "inputSchema": {
        "properties": {
          "iso_group": {
            "description": "ISO 513 group. Use S_TI for titanium, S_NI for nickel superalloys.",
            "enum": [
              "P",
              "M",
              "K",
              "N",
              "S_TI",
              "S_NI",
              "H"
            ],
            "type": "string"
          }
        },
        "required": [
          "iso_group"
        ],
        "type": "object"
      },
      "name": "speeds_feeds_starting_values"
    }
  ]
}

What the leaf hashes

{"body":"c2d0a6e3a84651c1315a0fff1a91d3e24f5ca0f6cdbc550fedec58fad4471fe6","id":567473,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793138741392898,"prev":null,"subject":"3e5a37cc-9f04-4265-904b-9bed679f9ede","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. 0xc58630e06b8398d01ed9f5f52587519f81f56a08d947aab31b83e42298a75b14
2. 0x501dc7f41f7d850b412290d5845cc8a3e72e989f12972b7793fc14719b1964b5
3. 0xfa18202f0ad09755791d3a285531ff0db49133101893529c0870571887ee426f
4. 0xebb0ba4b0d6128875918e8777ee48bd9e1b12e958fd28d502a1370fad41dcd90
5. 0x2a46b196c0ab6770a704bd491c531b513ef77e885c586622474bc59d544c7d3c
6. 0xb728fabb44bc134860ca9998545b73ccd85526ea74361bd631f5030b41b4db1c
7. 0xebdb4aa433bf6e06ee10292ce638fda5d810664563efb4443a5fe6e6057e5923
8. 0x613691fa934c9860e6a4aa33ab2bceef30d0e27772321ddc106d8262f79ce636
9. 0xa18fc07711c01beabf1cea14b84183d394dc76e32b5d92e69f62efce096686ea
10. 0x8df52d496471e75e89f2aaedf085eeb513c13af12e3f665315115c5ce8eb9e9f
11. 0xaee0b65107319ac7d478b02b678408530570d0ec7f9fc1210cadd287c876dc5a
12. 0xee8734682e9314905d7abd2575a48cec1c4d752265d2b88ce346211a72684543
13. 0x72d49c3472216d5e76117068ea9a2a5f617bdb2ffda241f677ce8098a0219dfc
14. 0x077edf0f29e2a3aa19c876439830696b88f0236fd0b2a3c43c76f38cdd29bb2b
15. 0x73341bb09dd901ca47f26173883431496e3d98d6b0fb5b89f36218126d46c5d4
16. 0xa94627de1af0e823832e05a9069b304ecccb8c0cdb8f9cfc4f2039bfb9799dc5
17. 0xdf1105afdc109de3c09a98fc8a3864159ad964e6f49b635c105a27a1e1f14310
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4