Evidence row 19877

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://ontarioprotocol.com/api/x402/base/tx-check"
    ]
  ],
  "name": "Ontario Protocol",
  "owner_address": "0xa2d72abf2c5e939fddca4156b74de482e03ca3ec",
  "raw": {
    "accepts": [
      {
        "amount": "2000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "quote_expires_at": 1792977589,
          "quote_id": "88c5abe9519644ecbe7303c0c3596238",
          "resourceUrl": "https://ontarioprotocol.com/api/x402/base/tx-check",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xa2d72aBF2C5e939fdDCA4156B74dE482e03CA3ec",
        "scheme": "exact"
      }
    ],
    "description": "Did this Base payment settle? Status, block, timestamp and confirmations for one transaction hash, with its ERC-20 Transfers decoded (token, from, to, amount; up to 100 listed, transfers_total gives the full count) and any EIP-3009 authorization used, plus match flags for an optional expected payTo and amount, so an x402 PAYMENT-RESPONSE can be checked. Required: hash. $0.002 USDC on Base. Transaction not found, no charge. No account, no API key. Base mainnet only. By Ontario Protocol.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "expected_amount": "500000",
              "expected_to": "0xa2d72aBF2C5e939fdDCA4156B74dE482e03CA3ec",
              "hash": "0xfe14a1712c65c815f1f056cb6b2fbe0f72b2b44eee0990bab5ece2914d7a0883"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "authorizations_used": [
                {
                  "authorizer": "0xc9c7b38C0942914fC8EA12063BC92dcd3b581670",
                  "nonce": "0x366fed83f5c2c8d619f993a8d33c75765208dde91a214676944640d98d040178",
                  "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
                }
              ],
              "block": 51838957,
              "block_hash": "0xa6d26e6d5666d11350491e89b07659b8887804b3d6d7fac532c4da1ec4a4fceb",
              "confirmations": 1210953,
              "effective_gas_price_wei": "6857500",
              "expected": {
                "amount_atomic": "500000",
                "amount_matches": true,
                "rule": "Any USDC Transfer in the transaction; with expected_to set, the amount must be on a transfer to it.",
                "to": "0xa2d72aBF2C5e939fdDCA4156B74dE482e03CA3ec",
                "to_matches": true,
                "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
              },
              "from": "0x2A89407a98A0732b7fD578c4E156B7166540EB5A",
              "gas_used": 86302,
              "hash": "0xfe14a1712c65c815f1f056cb6b2fbe0f72b2b44eee0990bab5ece2914d7a0883",
              "network": "eip155:8453",
              "read_at": "2026-10-25T00:46:05Z",
              "schema": "ontario.base_tx_check.v1",
              "source": "Base RPC",
              "status": "success",
              "timestamp": "2026-09-27T00:01:01Z",
              "to": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
              "transfers": [
                {
                  "decimals": 6,
                  "formatted": "0.5",
                  "from": "0xc9c7b38C0942914fC8EA12063BC92dcd3b581670",
                  "raw": "500000",
                  "symbol": "USDC",
                  "to": "0xa2d72aBF2C5e939fdDCA4156B74dE482e03CA3ec",
                  "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
                }
              ],
              "transfers_total": 1,
              "usdc_payment": {
                "amount_atomic": "500000",
                "amount_usdc": "0.5",
                "eip3009_authorization_observed": true,
                "payer": "0xc9c7b38C0942914fC8EA12063BC92dcd3b581670",
                "recipient": "0xa2d72aBF2C5e939fdDCA4156B74dE482e03CA3ec"
              }
            }
          }
        },
        "schema": {
          "properties": {
            "input": {
              "properties": {
                "queryParams": {
                  "additionalProperties": false,
                  "properties": {
                    "expected_amount": {
                      "description": "Optional USDC amount in atomic units, for example 500000 for 0.5 USDC.",
                      "pattern": "^[0-9]{1,78}$",
                      "type": "string"
                    },
                    "expected_to": {
                      "description": "Optional payTo address the USDC transfer should reach.",
                      "pattern": "^0x[0-9a-fA-F]{40}$",
                      "type": "string"
                    },
                    "hash": {
                      "description": "Base mainnet transaction hash.",
                      "pattern": "^0x[0-9a-fA-F]{64}$",
                      "type": "string"
                    }
                  },
                  "required": [
                    "hash"
                  ],
                  "type": "object"
                }
              },
              "required": [
                "queryParams"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "additionalProperties": true,
                  "type": "object"
                }
              },
              "required": [
                "example"
              ],
              "type": "object"
            }
          },
          "required": [
            "input",
            "output"
          ],
          "type": "object"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1792947859/bazaar-icons/8374ff393e7c4b50.png",
    "lastUpdated": "2026-10-26T01:14:49.551Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-26T01:14:49.366Z"
    },
    "resource": "https://ontarioprotocol.com/api/x402/base/tx-check",
    "serviceName": "Ontario Protocol",
    "tags": [
      "verify base transaction",
      "x402 payment receipt",
      "did payment settle",
      "usdc transfer check",
      "base"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Did this Base payment settle? Status, block, timestamp and confirmations for one transaction hash, with its ERC-20 Transfers decoded (token, from, to, amount; up to 100 listed, transfers_total gives the full count) and any EIP-3009 authorization used, plus match flags for an optional expected payTo and amount, so an x402 PAYMENT-RESPONSE can be checked. Required: hash. $0.002 USDC on Base. Transaction not found, no charge. No account, no API key. Base mainnet only. By Ontario Protocol."
}

What the leaf hashes

{"body":"1eca19d3fd57b299de5c1843fd0d73ef3af2ec65364364fa45f1d4ba8d5d2be5","id":19877,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793025332198914,"prev":null,"subject":"x402_bazaar:https://ontarioprotocol.com/api/x402/base/tx-check","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. 0x0d44009afbb3a4bcd251542c93caed808d3e2eb3f80f5e7f5e7cc8b8f6a7b7f4
2. 0x4d47c2abb35c7b82c2d954dedf3e63a7cbe1202334aa00fb4cfdc2c5b932ff1f
3. 0x6a0a030ffe86a32399bc01b12aa7c19b7b7cf506731d55b72b2cec738ffbeb48
4. 0x319a5e2658ec1b286874035ae9575cd69124374a92dc26584658647fd9882815
5. 0x0d1f2aeadd823a14c10773390bbb6eee49372b5470c7004c870147787b6d5996
6. 0x3c5774992124df7076a400cb9d0c393d3aeb9c90b25124fb8655559bb8aa5df5
7. 0xee47a32c91a1eee1ab8980a12da71ceabf46ffcb294a4479b18288c754f04336
8. 0xbf837f7a09167000ce3cb67b2eeedd06943a2883df853dcb433a5e91e49f5dc0
9. 0x8122f82fd4b37e6dcb8ce2bd2377d47d42aad4815a6db7c66338df2a22a8008d
10. 0x7df9268e3c799b09f6f61ac8a493750625b19546a343d4f6c00812722a4e4de6
11. 0x1dd760089997f06dc5264f791d622a6e7eaf78f6daa715333a752d033cdb2e03
12. 0x362683225b724b8d2d652a95968c57a6f4199ed4f2ad60900fc3603492f17520
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