Evidence row 1262801

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://base-token-check.vercel.app/check"
    ]
  ],
  "name": "Base Token Check",
  "owner_address": "0x5498b0aa90cd56f8962cbd136df3d3769c85f149",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x5498b0Aa90cd56F8962CBd136DF3D3769C85f149",
        "scheme": "exact"
      }
    ],
    "description": "Base mainnet token facts: name, symbol, decimals, totalSupply, contract/EIP-1967 proxy status, owner(), and mint/pause/blacklist selectors in bytecode. Facts only, no ratings.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
              "block_number": 53260243,
              "bytecode_size_bytes": 1852,
              "cached": false,
              "chain": "base-mainnet",
              "chain_id": 8453,
              "decimals": 6,
              "disclaimer": "Raw on-chain facts read from Base mainnet at the given block. Not an opinion, rating, audit or investment advice. Selector matches only show that a 4-byte function selector appears as a PUSH4 constant in the scanned bytecode (proxy and, if found, its implementation); they do not prove who can call the function or that it works, and selectors with a leading zero byte or unusual proxy patterns may be missed.",
              "functions_in_bytecode": {
                "blacklist": {
                  "matched_signatures": [
                    "blacklist(address)",
                    "unBlacklist(address)",
                    "isBlacklisted(address)"
                  ],
                  "selector_found": true
                },
                "mint": {
                  "matched_signatures": [
                    "mint(address,uint256)"
                  ],
                  "selector_found": true
                },
                "pause": {
                  "matched_signatures": [
                    "pause()",
                    "unpause()",
                    "paused()"
                  ],
                  "selector_found": true
                }
              },
              "functions_scanned": "proxy+implementation",
              "is_contract": true,
              "is_eip7702_delegated_eoa": false,
              "name": "USD Coin",
              "owner": "0x3ABd6f64A422225E61E435baE41db12096106df7",
              "proxy": {
                "admin": null,
                "beacon": null,
                "beacon_implementation": null,
                "implementation": null,
                "is_eip1967_proxy": false,
                "legacy_zeppelinos_implementation": "0x2Ce6311ddAE708829bc0784C967b7d77D19FD779"
              },
              "symbol": "USDC",
              "totalSupply": "4291664762979566"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "token": {
                      "description": "Base mainnet (chain id 8453) token contract address",
                      "pattern": "^0x[0-9a-fA-F]{40}$",
                      "type": "string"
                    }
                  },
                  "required": [
                    "token"
                  ],
                  "type": "object"
                },
                "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": "2026-10-29T22:52:43.81Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-29T22:52:43.603Z"
    },
    "resource": "https://base-token-check.vercel.app/check",
    "serviceName": "Base Token Check",
    "tags": [
      "base",
      "erc20",
      "token",
      "onchain",
      "facts"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Base mainnet token facts: name, symbol, decimals, totalSupply, contract/EIP-1967 proxy status, owner(), and mint/pause/blacklist selectors in bytecode. Facts only, no ratings."
}

What the leaf hashes

{"body":"cda1c2a75facc193694dac9d739a7e99bf64d959b13a9f171488bd5036416b74","id":1262801,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793385587687014,"prev":null,"subject":"x402_bazaar:https://base-token-check.vercel.app/check","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-30 (243099 rows).

1. 0xa777e84a8f0bac27dc53f5aa5032b7033989e52150c5cd7b4e9018cbef38d6f0
2. 0x931befe636b65e5dafafda43f9ca752f0e4a9bcf3b083af6c415a5988645c6a0
3. 0x248a470d814c6447d8c9b691385232e9a8ef9e35138f0508fac95ac142fe8878
4. 0xbe85fc0cbc5d99ef5d2a159dc2147808abce8632a5d03605dda0544653db995e
5. 0x8cf657c592fc540432af8f011bb86b95d8ccbdc6a1c305bdc00dbe719c0d9d8f
6. 0x619f43bc114fee7fb2b0c3616d13950267e260da2dc51c23d632730accf988d3
7. 0x0a60c23f25653595341ee277b394c04facc8b766500a9f6cb49989e0a5dbd618
8. 0x5b3fdb0e8408989a1b78a546d09349ec77139e36cd159d3e847c0dbd878a50e2
9. 0x0db7d94c725cc412bbcf1ab3d6963c50e584486dbc5ddd887aefa0cce97ca52f
10. 0x172287768b0b5b6cea7b540a3cafabec72b20805b01b775587a7905e602ced0f
11. 0xf9bc250c0d8a0ca82d1dc289b7f3c6512568e7eb9d78609d8e21bace2abc7f70
12. 0x3df2c2751beefa6a19741e59d066755ac151aecfeffe57bb4142a13391159e9d
13. 0xa2b1de1ad77c2c402e9780077d54e1e375f0df615775330ca3b7f3a0ca384ce1
14. 0xe11a711cdcc033b4d3ff4f10f0568bda761703429a7ddfbf68a7fbd1d22911ff
15. 0x11b43ed362a2fd4976e11eceb94ee4b7edbaf6823474ee1c36489f8f0a0496c4
16. 0x835211170e79bdce1a823ec914e3532e128f77751e9074286da35091b0200284
17. 0x61ef83255d34604cb052882568ca1d1386ac3cfb8284509715bc1734cff77831
18. 0x0c43c73b62a5d49ee1444b5dc4195fc5b16b141d3f4458e2e9fbd5fd6ecb367d

Day root

0x0826c7ad6039e06a2360ca0a4a3a4fe7f2626c6dc19f71a37599386f78b39875

Chained

0x36b4c8a1063758f0b8765fa1bdf75fa92fb543cc183add3e261880ee2bd1f822

Published

On Arc Testnet, block 69923247: 0x8704744146c6967c8abc9e9a99de4db7283b29e840922ea83a69b6fe776e6861