Evidence row 18754

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://agentsvc.io/api/v1/proxy/btc-timestamp"
    ]
  ],
  "name": "Bitcoin Timestamp OpenTimestamps",
  "owner_address": "0x622efa6ceb83a5b6edbc931332f4db68b7f74f27",
  "raw": {
    "accepts": [
      {
        "amount": "5000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27",
        "scheme": "exact"
      },
      {
        "amount": "5000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
        },
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "5JzPS5qpEwUM1vTC9GG7uqvwJdHzbEwfoPHf2Ki977tg",
        "scheme": "exact"
      },
      {
        "amount": "5000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:137",
        "payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27",
        "scheme": "exact"
      },
      {
        "amount": "5000",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:42161",
        "payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27",
        "scheme": "exact"
      }
    ],
    "description": "Timestamp anything on Bitcoin with OpenTimestamps: send text, a SHA-256 hash or a URL and get a standard .ots proof (base64). Only a salted hash leaves our server. The public calendars anchor it in a Bitcoin block within hours; then btc-timestamp-verify returns the block and the complete proof, which anyone can check with the open-source ots tool. For contracts, AI outputs, datasets, invoices and web evidence.",
    "extensions": {
      "bazaar": {
        "category": "data",
        "info": {
          "input": {
            "body": {
              "text": "Contract draft v3, agreed 2026-10-11"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "data": {},
              "success": true
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "hash": {
                      "description": "SHA-256 hex, alternative to text",
                      "type": "string"
                    },
                    "text": {
                      "description": "Content to timestamp (hashed with SHA-256)",
                      "type": "string"
                    },
                    "url": {
                      "description": "Timestamp the exact bytes this URL returns now",
                      "type": "string"
                    }
                  },
                  "required": []
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST",
                    "PUT",
                    "PATCH"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "data": {
                      "properties": {
                        "calendars": {
                          "type": "array"
                        },
                        "next_step": {
                          "type": "string"
                        },
                        "ots_base64": {
                          "type": "string"
                        },
                        "sha256": {
                          "type": "string"
                        },
                        "status": {
                          "type": "string"
                        }
                      },
                      "type": "object"
                    },
                    "success": {
                      "type": "boolean"
                    }
                  },
                  "required": [
                    "success",
                    "data"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        },
        "tags": [
          "timestamp",
          "opentimestamps",
          "bitcoin",
          "proof-of-existence",
          "notarization"
        ]
      },
      "builder-code": {
        "info": {
          "a": "bc_q6wi3opd"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1791462963/bazaar-icons/243ff0b79dbee242.png",
    "lastUpdated": "2026-10-26T04:10:47.532Z",
    "quality": {
      "l30DaysTotalCalls": 5,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-26T04:10:47.323Z"
    },
    "resource": "https://agentsvc.io/api/v1/proxy/btc-timestamp",
    "serviceName": "Bitcoin Timestamp OpenTimestamps",
    "tags": [
      "timestamp",
      "opentimestamps",
      "bitcoin",
      "proof-of-existence",
      "notarization"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Timestamp anything on Bitcoin with OpenTimestamps: send text, a SHA-256 hash or a URL and get a standard .ots proof (base64). Only a salted hash leaves our server. The public calendars anchor it in a Bitcoin block within hours; then btc-timestamp-verify returns the block and the complete proof, which anyone can check with the open-source ots tool. For contracts, AI outputs, datasets, invoices and web evidence."
}

What the leaf hashes

{"body":"02acc4d5ce73d04f343b580b0d79be0ed089a23ad5a4e2d0b92b542a8694e4b0","id":18754,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793025330570292,"prev":null,"subject":"x402_bazaar:https://agentsvc.io/api/v1/proxy/btc-timestamp","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. 0x0c71f558552b7ce8662272eca1e980b66ccf53e0e5526c6f810fcec4510c9145
2. 0x8e91669f75b138d5ff5db59be852a7f5b18893891b46b44abc3ee151c9303797
3. 0xaa54deca25d909d2177aeeb589dd8d2cebeb25c67ad3db078dd6cef8dbf9db05
4. 0x44fd11db449c4d0716b12cc98976c3cc4055e31307df81925fd01695d46805d1
5. 0x1eb2c6bfe6ee1e48fa271ffca19505c19f2237c7a53eb1e3ac80f4c7f95269bf
6. 0xbce2089c702c29eb49310cb37996bb77696e38ca271435629ca647e5e6a91c05
7. 0xf8a20adb49aacc5bef0b18c57b43f295d5a1132902cfc1259aee5ce4e56b399d
8. 0xf98ccb3e6fd2bbff5e80ae8e4efebd3c6f6506339628bd6d703ca43ea59dcb03
9. 0x79942f02f415ac4ad16fa35ed9ebe5bc6a34290f8bf413cdd71cdf4d226a032c
10. 0xbe1b36b968b56faed4c267ac55542429bece302d9dc696aa907f7a42f10746ee
11. 0x8eb597b47b241899ba9947d79964713d71582858e40e13030f7b428006b500c7
12. 0x0295c7c2280f85143f6ea027ec5cab1cda783eeef5bca0accb9aea607c5aa3c2
13. 0x5aefcf9e3d86e125861c0d490079969110eea8fc901ec61531bba10bb58258a1
14. 0xa96bb9408ce00a0d40ddaba8736257dfce76d5478b131d69db1afdf8a824312b
15. 0x7ddc2fead128357f881b63e6c7c26d7fbbb84fca6c7c8e0bbfe386de86ca8d39
16. 0xc6a4d7899a0f442958e26505011190b7cff2483611c1b94eba9043e0ba9ac36e
17. 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae