Evidence row 75763

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://gblin.digital/api/x402/seal"
    ]
  ],
  "name": "gblin.digital/api/x402/seal",
  "owner_address": "0x0eba5d314f4f5dcb7a094953fa9311a45172dd1b",
  "raw": {
    "accepts": [
      {
        "amount": "4500",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x0ebA5d314F4f5Dcb7A094953Fa9311a45172dd1B",
        "scheme": "exact"
      }
    ],
    "description": "Call after your agent completes an action it may later have to prove: seal the hashes of its input and output (only your action label and meta are published) into GBLIN's signed append-only transparency log and get a portable receipt: Ed25519 signature, RFC 6962 inclusion proof, C2SP signed checkpoint; root anchored daily on Base (EAS). Proves existence and time, not correctness. Free reads and demo: gblin-mcp.gblin-mcp-worker.workers.dev/log",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "action": "summarise-contract",
              "input_hash": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "checkpoint": "<C2SP signed note>",
              "format": "gblin-receipt/v1",
              "inclusion_proof": [
                "<base64 node>",
                "<base64 node>"
              ],
              "index": 42,
              "leaf": "<base64 sha256(0x00 || canonical)>",
              "payload": {
                "action": "summarise-contract",
                "index": 42,
                "input_hash": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
                "log": "gblin.digital/receipts-log",
                "output_hash": null,
                "ts": "2026-08-30T09:00:00.000Z",
                "v": 1
              },
              "root": "<base64 Merkle root>",
              "signature": "<base64 Ed25519 over the canonical record>",
              "tree_size": 43,
              "verifier_key": "gblin.digital/receipts-log+00c6e18c+...",
              "verify": "offline: see verify-receipt.mjs in github.com/gblinproject/gblin-treasury-risk-regime (zero deps)"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "action": {
                      "description": "Short public label for what the AI did. PUBLISHED in the log: identifiers only, never secrets.",
                      "maxLength": 128,
                      "type": "string"
                    },
                    "agent_id": {
                      "description": "Your agent identifier (optional). PUBLISHED.",
                      "maxLength": 128,
                      "type": "string"
                    },
                    "input_hash": {
                      "description": "sha256 of your input, 64 hex chars (0x prefix optional)",
                      "pattern": "^(0x)?[0-9a-fA-F]{64}$",
                      "type": "string"
                    },
                    "meta": {
                      "description": "Extra JSON object as a string (optional). PUBLISHED.",
                      "maxLength": 512,
                      "type": "string"
                    },
                    "output_hash": {
                      "description": "sha256 of your output, 64 hex chars (optional)",
                      "pattern": "^((0x)?[0-9a-fA-F]{64})?$",
                      "type": "string"
                    },
                    "tool": {
                      "description": "Tool or model used (optional). PUBLISHED.",
                      "maxLength": 128,
                      "type": "string"
                    }
                  },
                  "required": [
                    "action",
                    "input_hash"
                  ],
                  "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": "2026-10-11T06:18:07.351Z",
    "quality": {
      "l30DaysTotalCalls": 3,
      "l30DaysUniquePayers": 3,
      "lastCalledAt": "2026-10-11T06:18:07.186Z"
    },
    "resource": "https://gblin.digital/api/x402/seal",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Call after your agent completes an action it may later have to prove: seal the hashes of its input and output (only your action label and meta are published) into GBLIN's signed append-only transparency log and get a portable receipt: Ed25519 signature, RFC 6962 inclusion proof, C2SP signed checkpoint; root anchored daily on Base (EAS). Proves existence and time, not correctness. Free reads and demo: gblin-mcp.gblin-mcp-worker.workers.dev/log"
}

What the leaf hashes

{"body":"0e7192f2e8eba2e9f156c202c8559dc54c72e14c9f6da7463e00dd901233fc7b","id":75763,"kind":"listing","method":"baseline/1","observed_us":1793025491066362,"prev":null,"subject":"x402_bazaar:https://gblin.digital/api/x402/seal","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. 0xff173ecbf62e1ba39e89a0845bf2ea7d907c2d83017a8b8a1688d5e3df149f1a
2. 0x1bbfd8b0dac81fe43c4def32b4601c1956b7a90887af7f146eeaf846c00f0ce7
3. 0x8b03094d62a4f71cbcbef7c5ce4c701204731ba02bb3668e06794257dd46809b
4. 0xec3ff5db4d9ab097908f95ea56be296b1516a575864d74b94b29c5d6aa203b4b
5. 0x3cb6e0ad09a9031bb75858c3158b096db9de31fd8bdf75fe7206abe5a021d62d
6. 0x621c16edf2fc65ac611fbc254b16721b9803387f03f27f13c861824310a6a84d
7. 0x8a2b10380b61f46ab805bd3830926c45f5d1145f61985391c8b0b2f1771534fc
8. 0x6109c0b3cf1788d1f6ef7db3a665ce6149edd2e7ec3e15ff9f4ae9995fa3476e
9. 0xce82681ed0eca529546cd6a725350af5ca74d677e0b581ca813d34bc6fc0de11
10. 0x301cb2348a778b944d1bff0de6fa4d710487d6a5b6fb61608bd9e3d5df1f098a
11. 0xf0e3125fdb80cc0fbd2c1ed68c94834a74c7a387a89a1ab6de49183f24f78649
12. 0xbd264414f726ecec85a6b231446a7d5db56b5a61f8c3f471b7913d982daa291d
13. 0x74a0a08e4e7ab9aa5bfbead33dec7e1c7e8e364cff69a63720d764bbe987aadc

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae