Evidence row 527347

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://hash.openverbs.com/v1/hash"
    ],
    [
      "x402",
      "https://hash.openverbs.com/v1/hmac"
    ]
  ],
  "name": "hash.openverbs.com",
  "owner_address": null,
  "raw": {
    "caip2_networks": [
      "eip155:8453"
    ],
    "category": "",
    "description": "",
    "domain": "hash.openverbs.com",
    "endpoints": [
      {
        "description": "Compute a cryptographic digest (SHA-2, SHA-3, BLAKE2, and legacy SHA-1/MD5/RIPEMD-160) of some data. The input may be utf8/hex/base64/base64url and the digest is returned as hex/base64/base64url.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "sha256",
            "group": "body",
            "name": "algorithm",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "example",
            "group": "body",
            "name": "data",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "utf8",
            "group": "body",
            "name": "inputEncoding",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "hex",
            "group": "body",
            "name": "outputEncoding",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "1",
          "l30DaysUniquePayers": "1"
        },
        "serviceName": "Hash data",
        "tags": [
          "hash data",
          "sha256 hash",
          "compute digest",
          "md5 checksum api",
          "sha3 digest"
        ],
        "url": "https://hash.openverbs.com/v1/hash"
      },
      {
        "description": "Compute a keyed HMAC of some data with a secret key — the standard way to sign and verify webhooks (Stripe, GitHub, etc.) and API requests. Data and key may each be utf8/hex/base64/base64url; the tag is returned as hex/base64/base64url.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "sha256",
            "group": "body",
            "name": "algorithm",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "example",
            "group": "body",
            "name": "data",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "utf8",
            "group": "body",
            "name": "inputEncoding",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "example",
            "group": "body",
            "name": "key",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "utf8",
            "group": "body",
            "name": "keyEncoding",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "1",
          "l30DaysUniquePayers": "1"
        },
        "serviceName": "HMAC data",
        "tags": [
          "hmac signature",
          "sign webhook payload",
          "verify webhook hmac",
          "keyed hash api",
          "hmac sha256"
        ],
        "url": "https://hash.openverbs.com/v1/hmac"
      }
    ],
    "enriched": false,
    "iconUrl": "",
    "id": "hash-openverbs-com",
    "integrationType": "",
    "isNew": false,
    "name": "hash.openverbs.com",
    "networks": [
      "Base"
    ],
    "priceSummary": {
      "avgCostBasis": "exact",
      "avgCostPerTransaction": "0.002",
      "currency": "USDC",
      "maxAmount": "0.002",
      "minAmount": "0.002"
    },
    "provider": "hash.openverbs.com",
    "providerUrl": "",
    "serviceName": "H",
    "tags": [
      "hash data",
      "sha256 hash",
      "compute digest",
      "md5 checksum api",
      "sha3 digest",
      "hmac signature",
      "sign webhook payload",
      "verify webhook hmac",
      "keyed hash api",
      "hmac sha256"
    ]
  },
  "source": "agentic_market",
  "summary": ""
}

What the leaf hashes

{"body":"cb20b4c86f48faa9612c7a322a85725217ef43d848bdd3fe4e95e9b2afa3530f","id":527347,"kind":"listing","method":"sync.agentic_market/1","observed_us":1793124807710730,"prev":469746,"subject":"agentic_market:hash-openverbs-com","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0x988bd719f4512f09319219f256492d92d5050d9834804cdcd6a02b6a9c459cae
2. 0xf786377d78af776e28accc7c6c8f16f70e6d2a99dc550d43446a2e78adc6d83e
3. 0xa5a764b1e535b57a9d867f2e0f7beec8646bb54fa980a8a25fccdaefa19ac569
4. 0x5bb218d29bd1406235fc206e6bac7b0dedfaeaba1993532029f986314be4b8ca
5. 0x0382e24ee123bc6de74ad19eef2497f7af3eb84ab31f3d1123513d3de9705c03
6. 0x1ab801e1155f387ee089b1de72703f18dcb8458923864c348b1c75e14561415a
7. 0x97d1c6ea09f252b898eccd1e5ce57aa2bb2f25878bb51aeab97659fd08fad166
8. 0x3c5bde31f46a6dd0153260420da65f20d526e59281bae9ae1614804ce3c0ed44
9. 0xa25034b637345a290eeb3fa67cf52f60ff8cf638a84579dcdb7151abdb28d713
10. 0x6590d6a2c3866956c507a0a7524c10d1987a0ffcdc43cab673b274ce4e797a69
11. 0xc20f230e6a5e6bcd62065b3cf5e6a893589ba117af49ef95dd2bdfe194a358dd
12. 0xff66a3c0db6d61623a5ee399a8625355b32e95a4eb77e6d9f9ca4ae4dcbc5937
13. 0xfe6d2e9a468b7e99de9162a2ef30ac0b0e3b318387b4356bf524493aa67b295b
14. 0xa3c9c760ee424c178bab782711c2b9d3e15a80a6fde99165972cb75b306bb8b4
15. 0xb4f7223140c8a36cb87a63d77cf617086d9968dc4658f03e102571ebe06e9ed6
16. 0xfecf3d4646dd4984a13dd715499e842c3fde63692336d97394c2bfd8e877ca5d
17. 0xf30fddbf4811226c58e8f0daf36fddd79fc5f1356b592bb1d99a8061ddbabe66
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4