Evidence row 516870

What was observed

{
  "count": 3,
  "tools": [
    {
      "description": "Spillmark's method in brief: how a geo holdout test measures the sales Meta ads cause on Amazon, with links to the full method and a sample report on made-up numbers.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {},
        "type": "object"
      },
      "name": "how_lift_is_calculated"
    },
    {
      "description": "Spillmark's free Amazon and Meta ads calculators (holdout test size, incremental ROAS, break-even ROAS, ACoS, TACoS, Amazon fees and profit, LTV and CAC), with each one's inputs and example values. Use run_calculator to run one.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "q": {
            "description": "Filter by words in the name or summary, e.g. 'holdout' or 'fees'",
            "maxLength": 60,
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "list_calculators"
    },
    {
      "description": "Runs one calculator from list_calculators on your numbers and returns the headline result, the supporting figures, a one-sentence reading, and a link that opens the calculator with the same inputs. Missing inputs use the calculator's example values. Enter percents as points (15 means 15%), choices as the option index.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "currency": {
            "description": "Currency for money results. Default USD",
            "enum": [
              "USD",
              "EUR",
              "GBP",
              "CAD",
              "AUD"
            ],
            "type": "string"
          },
          "inputs": {
            "additionalProperties": {
              "anyOf": [
                {
                  "type": "number"
                },
                {
                  "maxLength": 32,
                  "type": "string"
                },
                {
                  "type": "null"
                }
              ]
            },
            "description": "Input values by key",
            "propertyNames": {
              "type": "string"
            },
            "type": "object"
          },
          "slug": {
            "description": "Calculator slug from list_calculators, e.g. holdout-test-calculator",
            "maxLength": 80,
            "minLength": 1,
            "type": "string"
          }
        },
        "required": [
          "slug"
        ],
        "type": "object"
      },
      "name": "run_calculator"
    }
  ]
}

What the leaf hashes

{"body":"ba2420980a7eca76b3a8c32eb72c507ee4d9c1511f7ecdaf7d195fda31c95013","id":516870,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793120848350700,"prev":null,"subject":"f5716995-3b47-40ab-9582-fefec7058a7a","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. 0xa5300e9f8713c79b9bb028fb9e71fd450d839043d2c29cbf3d1c7b2e20effed4
2. 0xad7f3ad29dfce8f33c8d1d6d576fe0988dd21a157472cc2769b3a6adb996a619
3. 0x0c669968f74821a8953c1014033253d07c60040fc24e65dae1a89e1860aba66f
4. 0xe1ba7c9c997af9e55d1694c32e28fe7e0001ff08157664e54a4b2690fa76601d
5. 0xbb7396fe80db7e566f71a8ed8d9c8d3304139905b479efbb5ee80d98b9f7f5c6
6. 0x6e2b4ea2effbc61a735fcb33fd3d2bb02c6621a7418452e03e9d9547a8f0ca25
7. 0xb4288add5b21a6bef4ddafb1d9f9eda937be94576a027e6892b7044591e8fd05
8. 0xc9580a010807d02fc52659111436c29ec126bf2b3a69192528d381c6ed047dd0
9. 0x1597abef3c2037a70f735bc9cc7fe97c6a501a79fbb453488d11a4036f75ff55
10. 0xf883d1c3835d48d9bbf31812ab3494ca3e1fe07c42ed8768932a5a052f848a5d
11. 0x69951fe7bef20c8209773a6c17f837f8a4e6e5fd13d18dd1c35d4587df471a68
12. 0xc99f276d750460ec390a64510fe7ad6b609e36fddb943e81299b02a623e63048
13. 0x87816aee66e8f6e0f1e55ea83733bb58cf9612d36c45fd5b7fc5d6f4484b78fd
14. 0x0644f7e2a4b5bf9b66f185cc3fbb766d456ad94490183852f4c6db5855114cc5
15. 0xa3fff4662cd48659f5bafd0612931759a90e53a7b4209ed8f26f6594a07bb547
16. 0x64c405a28e8819716221eb2529fe4ce277ab08025e17e685cbd5ece75ceb75c7
17. 0xf30fddbf4811226c58e8f0daf36fddd79fc5f1356b592bb1d99a8061ddbabe66
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4