Evidence row 266677

What was observed

{
  "count": 1,
  "tools": [
    {
      "description": "Current US federal (tax year 2026) rates and thresholds read from the IRS revenue procedures and notices, SSA's Federal Register notice and irs.gov pages, each figure with its source URL, the quoted sentence or table row, verifiedDate and the prior-year value where one exists. Categories: income-tax (rate schedules for Single, Married filing jointly, Head of household and Married filing separately as bracket rows, standard deduction by filing status, additional and dependent standard deduction, top rate), social-security (OASDI wage base, employee and employer rates, COLA, quarter of coverage), medicare (rate, Additional Medicare Tax rate and thresholds by filing status, employer withholding threshold), retirement (401(k)/403(b)/457(b)/TSP deferral limit, age-50 and age-60–63 catch-ups, Roth catch-up wage threshold, § 415(c) and compensation limits, IRA and IRA catch-up, SIMPLE, highly compensated employee), hsa (contribution limits, HDHP minimum deductible and out-of-pocket maximum, excepted-benefit HRA), estate-gift (basic exclusion, GST exemption, annual gift exclusions). Federal only: state income taxes, AMT, EITC and capital-gains brackets are not covered. An unknown category answers covered:false with the nearest keys.",
      "inputSchema": {
        "properties": {
          "category": {
            "description": "one of: income-tax, social-security, medicare, retirement, hsa, estate-gift (omit to list all)",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "us_rates_lookup"
    }
  ]
}

What the leaf hashes

{"body":"cf3f3a16be73beab013071d9a47d087b1a4d8ecae7aa418cc2fd31915da0c5e4","id":266677,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793035485473669,"prev":null,"subject":"6bcbadf1-f773-498b-a51d-d3a4b90e99bb","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. 0xd1bf67ba2e7a2d1019c1e9e74c2ff1ed848a3fcea9bf0b2b9f712824997c022f
2. 0x618a80cb443e57150c789aba83c34cb109948fdf08fcd3a3bf91d6a172e00999
3. 0x0188cc4a50582c70ba37b677b828d6bf9c4e5f05eda60796b599fa1055898ee4
4. 0x3319524ccbb88e316a35a9cf81e0eea4c75f97ad218a60073a92ff93104f8ad3
5. 0x65f5eafd717d862dde74ca7644f16791a9464fb64a437d68f76bffd405afcde5
6. 0x0639b5244c0407b535c9087974289247b5ef17e5b6c10f44c5c7cc2afdce4ec2
7. 0x82d4e4f33ddef9b72e5b9dda8e5072fd32fd22de8a77132a8e718a80c8372b0d
8. 0x6caf1de894c224cf8286845ce6a6248ec0324d830ead1f0b5dd9b2a8da5ccc5f
9. 0x4150589061b30d291e7235f1a994be8740c3c22358057bceadb9de1f7a4e886b
10. 0xd03ba161f40c51580284bcf2e65fb1818a9cf130ec62c36d7043b982e4e3abee
11. 0xf2fdee89378769052782dfd25aeff4865ec268617aa70e6d5f36f0b04808af0c
12. 0xa4ec009cd8db00b48fa2e4df84088950b4d34c37254de09f5e3789441c0c5e73
13. 0x889eefefef2d4457fe6114f397df813a5cbb85011a6f40309b54ddcd4aba3bd1
14. 0xefabf1105e09cf52c12c58e60cbb5048b9ac3f02631d1816a926e14bdd86fbdf
15. 0xe94ca5b798e9899ad611e57835af42266e20f53f44977e487d81365e30972beb
16. 0x703f95866af09c5e5d6ead7411e9a10f964a41a2aff64d4a55ff0053c023a023
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae