Evidence row 4136

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://verity.basechainlabs.com/api/agent"
    ],
    [
      "x402",
      "https://verity.basechainlabs.com/api/verify"
    ]
  ],
  "name": "verity.basechainlabs.com",
  "owner_address": null,
  "raw": {
    "caip2_networks": [
      "eip155:8453"
    ],
    "category": "",
    "description": "",
    "domain": "verity.basechainlabs.com",
    "endpoints": [
      {
        "description": "Conversational fact-checking with persistent memory — VERITY remembers what your agent has checked across sessions, skipping repeat lookups. Returns CURRENT/OUTDATED/DISPUTED/UNVERIFIABLE verdicts with confidence scores and sources. 0.10 USDC/call.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "my-agent-id",
            "group": "body",
            "name": "caller_id",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "Is GPT-4 still the most capable AI model?",
            "group": "body",
            "name": "query",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.1",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": null,
        "serviceName": "",
        "tags": [],
        "url": "https://verity.basechainlabs.com/api/agent"
      },
      {
        "description": "Fact-checking with persistent memory — VERITY remembers prior claims your agent has checked and skips repeat lookups, saving tokens across sessions. Returns CURRENT/OUTDATED/DISPUTED/UNVERIFIABLE verdicts with confidence score, sources, and what changed. 0.10 USDC.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "my-agent-id",
            "group": "body",
            "name": "caller_id",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "Verify: Is GPT-4 still the most capable OpenAI model?",
            "group": "body",
            "name": "query",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.1",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "9",
          "l30DaysUniquePayers": "1"
        },
        "serviceName": "",
        "tags": [],
        "url": "https://verity.basechainlabs.com/api/verify"
      }
    ],
    "enriched": false,
    "iconUrl": "",
    "id": "verity-basechainlabs-com",
    "integrationType": "",
    "isNew": false,
    "name": "verity.basechainlabs.com",
    "networks": [
      "Base"
    ],
    "priceSummary": {
      "avgCostBasis": "exact",
      "avgCostPerTransaction": "0.1",
      "currency": "USDC",
      "maxAmount": "0.1",
      "minAmount": "0.1"
    },
    "provider": "verity.basechainlabs.com",
    "providerUrl": "",
    "serviceName": "",
    "tags": []
  },
  "source": "agentic_market",
  "summary": ""
}

What the leaf hashes

{"body":"7310c377eed8906303b9f43ade9ae5073ae448248ea78295bdd7faeab38caa12","id":4136,"kind":"listing","method":"baseline/1","observed_us":1793025277220623,"prev":null,"subject":"agentic_market:verity-basechainlabs-com","subject_kind":"source_record"}

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. 0xd02b6aa932ffb43a0634670d4e9924720d10189586596906bc2011f6ad68ee1b
2. 0x0448a9b0980797325384842b1ad23a1df7c14027463484c7e730c239fa648723
3. 0x15cd58a57536e12107d2f980e558c68096f72a9b5b7f8b7f5e8a6f66876a32b3
4. 0xa8bbdad0d3cf0050a691c4718ec014d7aa7d37dd1ff6e2aa5a9ae99ece7fb1df
5. 0xa4fe4a94d8fe595cfaadca23c37338621f278ec8d884d1004fb525d1af0a71dd
6. 0x30efd8437e0d7c6295fdc9152c3ae218a10d858dd834ef885d76d8d43ef7ee70
7. 0x810950b1ddf1aade7829f4b71cb5c17fab2cc22b8980658bd99798189a858d6f
8. 0x0955ca0dc1222bad9e2c457a315a65acb44238281353114ff25258d3ab876889
9. 0x3aedbf03ef770e56c5149ef52baf35e5e367cc5dec2bcbfb6f068598f603a705
10. 0x0b686dbafff3016a42481f12f34ebfe6ab887a7ca8848d16b83a5946fcda3181
11. 0x026c75973d292b16fc9c1aefff047e2e4656075d16803275f6ae428cf2826ee1
12. 0x3f401930661bff9a668037b662b5b8766fa60035f100a3e9fc585c576d892ffa
13. 0xe43762a621da83c0b4b63f549cd2e19c428ac702bfc1038d70233867b06c447f
14. 0xefabf1105e09cf52c12c58e60cbb5048b9ac3f02631d1816a926e14bdd86fbdf
15. 0xe94ca5b798e9899ad611e57835af42266e20f53f44977e487d81365e30972beb
16. 0x703f95866af09c5e5d6ead7411e9a10f964a41a2aff64d4a55ff0053c023a023
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae