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Evidence row 1848

Observed , by baseline/1.

Kind
listing
About
source_record agentic_market:checksum-openverbs-com
Recorded
Previous row
None: the first of its kind about this subject
Body SHA-256
236fe286b742400a85a264a02771af72957004dfeaa5cc739b8b395226393778
Leaf
0x7ba37bb563a21a6b031c85d552479c3c9dba34751f8f93995d7d3147459d4217

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://checksum.openverbs.com/v1/adler32"
    ],
    [
      "x402",
      "https://checksum.openverbs.com/v1/crc16"
    ],
    [
      "x402",
      "https://checksum.openverbs.com/v1/crc32"
    ],
    [
      "x402",
      "https://checksum.openverbs.com/v1/fletcher"
    ]
  ],
  "name": "checksum.openverbs.com",
  "owner_address": null,
  "raw": {
    "caip2_networks": [
      "eip155:8453"
    ],
    "category": "",
    "description": "",
    "domain": "checksum.openverbs.com",
    "endpoints": [
      {
        "description": "Adler-32 checksum (as used by zlib) over the input payload. Faster than CRC-32 but weaker for short inputs. Returns the checksum as an unsigned integer and 8-digit hex. Non-cryptographic.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "example",
            "group": "body",
            "name": "data",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "utf8",
            "group": "body",
            "name": "encoding",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "1",
          "l30DaysUniquePayers": "1"
        },
        "serviceName": "Adler-32",
        "tags": [
          "adler32 checksum",
          "calculate adler32",
          "zlib checksum",
          "adler32 api",
          "fast data checksum"
        ],
        "url": "https://checksum.openverbs.com/v1/adler32"
      },
      {
        "description": "CRC-16 over the input payload in one of several standard variants (ccitt-false, xmodem, modbus, ibm; default ccitt-false). Returns the checksum as an unsigned integer and 4-digit hex. Non-cryptographic.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "example",
            "group": "body",
            "name": "data",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "utf8",
            "group": "body",
            "name": "encoding",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "ccitt-false",
            "group": "body",
            "name": "variant",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "1",
          "l30DaysUniquePayers": "1"
        },
        "serviceName": "CRC-16 (multiple variants)",
        "tags": [
          "crc16 checksum",
          "calculate crc16",
          "crc16 variants",
          "ccitt crc lookup",
          "modbus crc"
        ],
        "url": "https://checksum.openverbs.com/v1/crc16"
      },
      {
        "description": "CRC-32 (IEEE 802.3 polynomial, as used by zip, gzip and PNG) over the input payload. Returns the checksum as an unsigned integer and 8-digit hex. Non-cryptographic — for error detection only.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "example",
            "group": "body",
            "name": "data",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "utf8",
            "group": "body",
            "name": "encoding",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "1",
          "l30DaysUniquePayers": "1"
        },
        "serviceName": "CRC-32 (IEEE)",
        "tags": [
          "crc32 checksum",
          "calculate crc32",
          "crc32 api",
          "zip checksum",
          "gzip checksum"
        ],
        "url": "https://checksum.openverbs.com/v1/crc32"
      },
      {
        "description": "Fletcher checksum over the input payload, in 16-bit (default) or 32-bit width. Returns the checksum as an unsigned integer and hex. Non-cryptographic.",
        "method": "POST",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": 16,
            "group": "body",
            "name": "bits",
            "required": false,
            "type": "number"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "example",
            "group": "body",
            "name": "data",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "utf8",
            "group": "body",
            "name": "encoding",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "1",
          "l30DaysUniquePayers": "1"
        },
        "serviceName": "Fletcher-16 / Fletcher-32",
        "tags": [
          "fletcher checksum",
          "fletcher16 checksum",
          "fletcher32 checksum",
          "calculate fletcher",
          "fletcher api"
        ],
        "url": "https://checksum.openverbs.com/v1/fletcher"
      }
    ],
    "enriched": false,
    "iconUrl": "",
    "id": "checksum-openverbs-com",
    "integrationType": "",
    "isNew": false,
    "name": "checksum.openverbs.com",
    "networks": [
      "Base"
    ],
    "priceSummary": {
      "avgCostBasis": "exact",
      "avgCostPerTransaction": "0.002",
      "currency": "USDC",
      "maxAmount": "0.002",
      "minAmount": "0.002"
    },
    "provider": "checksum.openverbs.com",
    "providerUrl": "",
    "serviceName": "",
    "tags": [
      "adler32 checksum",
      "calculate adler32",
      "zlib checksum",
      "adler32 api",
      "fast data checksum",
      "crc16 checksum",
      "calculate crc16",
      "crc16 variants",
      "ccitt crc lookup",
      "modbus crc",
      "crc32 checksum",
      "calculate crc32",
      "crc32 api",
      "zip checksum",
      "gzip checksum",
      "fletcher checksum",
      "fletcher16 checksum",
      "fletcher32 checksum",
      "calculate fletcher",
      "fletcher api"
    ]
  },
  "source": "agentic_market",
  "summary": ""
}

What the leaf hashes

{"body":"236fe286b742400a85a264a02771af72957004dfeaa5cc739b8b395226393778","id":1848,"kind":"listing","method":"baseline/1","observed_us":1793025259434190,"prev":null,"subject":"agentic_market:checksum-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 (296695 rows).

  1. 0x7ba3d690ca8172217ca75ceb49937e7406a12039b4efcfc048694ad4c52a5c7b
  2. 0x752f8eda42338871bdcfd8da2b8c4d26a2df5e934133ba82a53ea6dafb643292
  3. 0x6c4353e52493d6a9c0a770aac6fb60b25ce4e1936b655a09db02682e7ea6a1d4
  4. 0x65fef00406106fe7418e21b1140c1ae6e8543fe7f9f14c5c28ad6ec578cbf045
  5. 0x4b3483580e251a8654c4bc7a32ff2c866d876651b2b9a0c75d29cfaa26e4abc6
  6. 0x8a37aab236552d0c8669dffec5245b2e6e06a7f1b2638c71441c2e1d6c7aec46
  7. 0x4c40c4320a2803b1e07b890f3b0a358f1292b314767169fdcaefd58799beff09
  8. 0x0496fb0617eaba094acb9ea90a85179b133403bcb9cab57f1b2c5e7ad6710908
  9. 0x8caee9afbb05a4835a218eb48fc91e7ed2d96d9ac2608aa5bd853fe7019d8d94
  10. 0xf2381ca3135154cac94d3453c232f31feb3dabefbf1c73459b1e84459d545370
  11. 0xe7152aaccc7d7d5da2d13bc6ee8ec470b8c1a5abe7dfed1431f0ed53ec50ebc5
  12. 0xa6406b1a5540d26e0cbd03bb274a01c10968fadb17913a6043bb9427ddfb71ba
  13. 0x01c95624b1f2385ef774ee258a9ae58a4df07a1bdaa829de84e1d5201f3f39c2
  14. 0x7721d38652b6444b18e1193824e50490ade04851ce6221771f6e374c4527d80f
  15. 0x15039087bf60ae9b06b756ec3cbc299760e59923a438bbd91e34d105186db0ed
  16. 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
  17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
  18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
  19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a
Day root
0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
Chained
0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
Published
On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae

How to check it · This row as JSON