Evidence row 297327

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://stampthisfile.com/v1/stamps"
    ]
  ],
  "name": "stampthisfile",
  "owner_address": "0x385881d9b1b8e11f840e0639139e314e64bc488a",
  "raw": {
    "accepts": [
      {
        "amount": "50000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "assetTransferMethod": "eip3009",
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x385881d9b1b8e11f840e0639139e314e64bc488a",
        "scheme": "exact"
      }
    ],
    "description": "Timestamp SHA-256 hashes in Bitcoin with OpenTimestamps: returns a standard .ots proof per hash (pending, complete within hours), verifiable without us",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "hashes": [
                "b94d27b9934d3e08a52e52d7da7dabfac484efe37a5380ee9088f7ace2efcde9"
              ]
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "batch_id": "bat_…",
              "stamps": [
                {
                  "hash": "b94d…cde9",
                  "id": "stp_…",
                  "ots": "<base64 .ots>",
                  "ots_url": "https://stampthisfile.com/v1/stamps/stp_….ots",
                  "status": "pending"
                }
              ]
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "hashes": {
                      "description": "Each hash costs the unit price; send each once",
                      "items": {
                        "description": "SHA-256 of the file, hex",
                        "pattern": "^[0-9a-fA-F]{64}$",
                        "type": "string"
                      },
                      "maxItems": 100,
                      "minItems": 1,
                      "type": "array"
                    },
                    "webhook": {
                      "properties": {
                        "signing_key": {
                          "description": "Optional Standard Webhooks secret (whsec_…) to also sign deliveries with HMAC (v1)",
                          "type": "string"
                        },
                        "url": {
                          "description": "https URL that receives stamps.completed / stamps.failed",
                          "format": "uri",
                          "type": "string"
                        }
                      },
                      "required": [
                        "url"
                      ],
                      "type": "object"
                    }
                  },
                  "required": [
                    "hashes"
                  ],
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json"
                  ],
                  "type": "string"
                },
                "headers": {
                  "additionalProperties": {
                    "type": "string"
                  },
                  "type": "object"
                },
                "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"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1792529635/bazaar-icons/19fe92af849b00dd.png",
    "lastUpdated": "2026-10-26T19:23:51.147Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-21T11:19:24.376Z"
    },
    "resource": "https://stampthisfile.com/v1/stamps",
    "serviceName": "stampthisfile",
    "tags": [
      "timestamp",
      "opentimestamps",
      "bitcoin",
      "proof-of-existence",
      "hash"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Timestamp SHA-256 hashes in Bitcoin with OpenTimestamps: returns a standard .ots proof per hash (pending, complete within hours), verifiable without us"
}

What the leaf hashes

{"body":"8716e63bec042ec2914e215d0f52c40dd5c16d996551cbf2880b773625093e4f","id":297327,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793052192701030,"prev":121937,"subject":"x402_bazaar:https://stampthisfile.com/v1/stamps","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. 0xb99d7dc4e226c3f18de519ba0844de19cf375632471424f2144b94e8f3d8b5b6
2. 0x19643a483cb95081301d3b2b3eb9a0bfc171d8bb2231bd2515ec4c32eef1e338
3. 0xeed76c9d1b7cba471c1b08e79de87e403e7eaa3ccd2c6511b3c8fc9f03a1728c
4. 0xdca971d2a686b6eac0a21f6cd89fcc2042cee270ffe97dcd3aac3795d8f785cc
5. 0xec5ff7b826ab2078fce1e57a263e7ab7abbe757a2d9909eb9988ab3ffed24686
6. 0xde34be80affbf28446a8a300f247e66213adfe48fbebb0a73ad589b141eb20bb
7. 0x50970d2467dbb5699fe2ecee7e84f88075cd25da086bfdc21aae84a504e8d69e
8. 0x34e8fe027972efc878df2210c6f8423fd1447b0c2f20a11adc5249cac1283a82
9. 0xf1756829b05217895f68ee473e5303ddded2191c842856cf4e432d9518a7616c
10. 0x818cc59d34ccfe2393f92012bc86601afd9f288f2f960767521cbd3053a3333c
11. 0xd0a8fcd7581320df765e293ac18ecdb0c84895304e75682f6c130e9b5c6b0ed8
12. 0x1a61f9ab4a9304db8146c466be341271a345718ebf06b718e0f0dd9f347d2fbd
13. 0x2f43fe2b2533a5f40c107c114e458e226102f5f8ae91f097e964345880e30928
14. 0xf692ce2b0a640ec9f75aa960e5fb1c2c7091a04e24881798735752c19014e519
15. 0x9f68b5e15459cb62b8c0cd4c124fa61c74147b4a5755a200fbecd21a581635d1
16. 0x123ec8bee20ddc55223eeef5a4f4d6c4b6416515adbb911c56759f5cde56e452
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae