Evidence row 266674

What was observed

{
  "count": 1,
  "tools": [
    {
      "description": "Check whether a source really says what a claim says it says, before you publish the claim. Give the claim and the source (an http(s) URL or arxiv:<id>). Without a quote you get back the source sentences that best match the claim. With quote (a sentence copied verbatim from the source) and stance (supports|contradicts, your judgment), the tool fetches the source on independent paths (origin, reader, web archive; for arXiv: metadata and full text) and returns SUPPORTED or CONTRADICTED only if the quote is found verbatim on at least two of them, else UNVERIFIABLE. A quote that is not in the source is reported as QUOTE NOT IN SOURCE, with the nearest real sentences. No key needed.",
      "inputSchema": {
        "properties": {
          "claim": {
            "description": "The sentence you want to check, as you would publish it.",
            "type": "string"
          },
          "quote": {
            "description": "Optional. The sentence from the source, copied verbatim, that bears on the claim.",
            "type": "string"
          },
          "source": {
            "description": "The source the claim rests on: an http(s) URL, or arxiv:<id>.",
            "type": "string"
          },
          "stance": {
            "description": "Optional, with quote. Whether that sentence supports or contradicts the claim (default supports).",
            "enum": [
              "supports",
              "contradicts"
            ],
            "type": "string"
          }
        },
        "required": [
          "claim",
          "source"
        ],
        "type": "object"
      },
      "name": "check_claim"
    }
  ]
}

What the leaf hashes

{"body":"6c65a7035c55bfea31433c59d45c9271d35b9481b870538ef57fc82f2e9a6214","id":266674,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793035485454403,"prev":null,"subject":"cc580f92-2e6a-4e50-9f96-2213692c24da","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. 0x76f5bfe48defb7652febddf637ca6d8857751e24ea4cfe0f4b9888ec1f00dac9
2. 0x9021b8b907f96dfcfba528d17664c077ce12261a235806cc6c1e8dea07538a10
3. 0x94cc83dedeb0b57ef5e144cddefee0bfeae9f0412834ebd2ff13b3f77170b5d5
4. 0xdd58d7b853852433dac94b7a0976319654ef95dcdb2d7a85765abb754b1a57a8
5. 0xa36c8e564ba6287223a38cc4da436d678c2722485d44fa09afc0f45423cf1fca
6. 0x90c37e34bac615c7624d7d122fd281d4813ebbe75f601199afba73815c3ef712
7. 0xef331657294177ac8ce84dd0207a581ea819551e163aeb667271cd1359ad180e
8. 0xdbe57850e59c70290dddc9b3950005a045011a6afad191416f678e7146255e6e
9. 0x6cd3debb5a65c2dafba9939b6b9fc1abd3a727f40687be43bc8d2d62366be83b
10. 0xb543a7014a7da7ab1677250ea2e4cf5246b237487bd67575741c51bad8f72af0
11. 0x2b0f6f9a9d5201404fd0cd99316c4ea1c2b3853278de26cb244fc2433c8b6831
12. 0x8fdfac9874f184de58b63efbdab0fc27674958d741146d02f58b04d3c559cabf
13. 0xdef3cab0b4070d8ad7f4f91288da4881d19789f131b1b353621df79df04a0617
14. 0xc4fe2177880ea1b0e82b6fe4c270090fd0fbe5af3a42a8cbf6a6ba2fa35625f6
15. 0x15039087bf60ae9b06b756ec3cbc299760e59923a438bbd91e34d105186db0ed
16. 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae