Evidence row 527877

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://x402-paid-mcp.vercel.app/api/v1/sha256"
    ]
  ],
  "name": "x402-paid-mcp.vercel.app/api/v1/sha256",
  "owner_address": "0x8686bd9bc270df09240e7d220a4bd4c627dccb03",
  "raw": {
    "accepts": [
      {
        "amount": "1000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x8686bd9BC270Df09240E7D220A4Bd4c627DCCb03",
        "scheme": "exact"
      },
      {
        "amount": "1000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "BFK9TLC3edb13K6v4YyH3DwPb5DSUpkWvb7XnqCL9b4F"
        },
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "2miRk3MikF5Uetgkd7o9MY7W6BESUaQTkDFupDZVPBym",
        "scheme": "exact"
      }
    ],
    "description": "Compute a SHA-256 hex digest of a text payload. Cryptographic hash / checksum helper. Not an attestation.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "data": "hello",
              "encoding": "utf8"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "encoding": "utf8",
              "sha256": "2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "data": {
                      "description": "Payload to hash",
                      "type": "string"
                    },
                    "encoding": {
                      "description": "utf8 | hex | base64 (default utf8)",
                      "type": "string"
                    }
                  },
                  "required": [
                    "data"
                  ]
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-27T10:16:52.655Z",
    "quality": {
      "l30DaysTotalCalls": 37,
      "l30DaysUniquePayers": 6,
      "lastCalledAt": "2026-10-27T10:16:51.802Z"
    },
    "resource": "https://x402-paid-mcp.vercel.app/api/v1/sha256",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Compute a SHA-256 hex digest of a text payload. Cryptographic hash / checksum helper. Not an attestation."
}

What the leaf hashes

{"body":"75420d46ef38c8c8aa8f4ec4f9ec9420509d7ec0a0a21b51d62126ee9fbc9e34","id":527877,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793124869097335,"prev":453140,"subject":"x402_bazaar:https://x402-paid-mcp.vercel.app/api/v1/sha256","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. 0xd005c11d94665ae4245fb3f3d70634fd22a34cdb8b1d5424e91d11b16243c5c5
2. 0x98c6013d8ffddb46d72aaf6610757b4570e43fdd5f337c7091c72f1e115428c5
3. 0x414542996ca67fcfbb213d3c1a9b7a149a0e3807c3c1b6d4622f39b185164c92
4. 0x6e52f724d92d3036af6246044436c9e4cb42f5f6ac7e2fc2151415e57377bbe7
5. 0x9e7631f46ca5cf7c9f97bd2d3fa3d5cd7614081acda262b4e0e81912b8fbaf46
6. 0xe8002507b67c193dc152ae20415e65d5747a59cae1c6447c431c71d4c79b697b
7. 0x98fa31f550e0c96fdcf4914ef2b429632fbb24abb1fbbbca5742111b0df3616a
8. 0x58502bfd7954ab5b416c049a424e27d090137abf16f3c1281952fd7acff25bd5
9. 0xf259e0e9b9d62580f1cc5883d5b6c79a1bc4b16483397211749dcf7c91ae43aa
10. 0x3065b94504be69ee520c14c1d60905f5c9fc567fa2688889f96bea6ff14c9f5f
11. 0xb0a0345698a651d16a7835ce0273cac8edfc7fe365d4501567c913ca6658deb7
12. 0x38b115338d9e861f29b2feec4763340cc61f27fc2c2bbe5bf04934e95e485c6c
13. 0xc66f83a1320fe7c1faf22674eeeb7fae22ecd2f0b102d9619a484291f2ce104a
14. 0x8f676edfb4faaa290229d8f4f69ab721fc627424463d62f5146b3d1ca7f2f0c6
15. 0x969cd44e5a4e8dc3110540398fbf689659eb51df735c1cda5d8f021ef9ff5683
16. 0xa94627de1af0e823832e05a9069b304ecccb8c0cdb8f9cfc4f2039bfb9799dc5
17. 0xdf1105afdc109de3c09a98fc8a3864159ad964e6f49b635c105a27a1e1f14310
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4