Evidence row 558790

What was observed

{
  "count": 5,
  "tools": [
    {
      "description": "Fetch one Open Brain thought by ID after using search. Use this read-only compatibility tool to retrieve the full text and metadata for citation.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "id": {
            "description": "The Open Brain thought ID returned by the search tool",
            "type": "string"
          }
        },
        "required": [
          "id"
        ],
        "type": "object"
      },
      "name": "fetch"
    },
    {
      "description": "List recently captured thoughts with optional filters by type, topic, person, or time range.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "days": {
            "description": "Only thoughts from the last N days",
            "type": "number"
          },
          "limit": {
            "default": 10,
            "type": "number"
          },
          "person": {
            "description": "Filter by person mentioned",
            "type": "string"
          },
          "topic": {
            "description": "Filter by topic tag",
            "type": "string"
          },
          "type": {
            "description": "Filter by type: observation, task, idea, reference, person_note",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "list_thoughts"
    },
    {
      "description": "Search Open Brain memories by meaning. Use this read-only compatibility tool when ChatGPT needs search/fetch-style access to stored thoughts.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "query": {
            "description": "The search query to run against Open Brain thoughts",
            "type": "string"
          }
        },
        "required": [
          "query"
        ],
        "type": "object"
      },
      "name": "search"
    },
    {
      "description": "Search captured thoughts by meaning. Use this when the user asks about a topic, person, or idea they've previously captured.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "limit": {
            "default": 10,
            "type": "number"
          },
          "query": {
            "description": "What to search for",
            "type": "string"
          },
          "threshold": {
            "default": 0.5,
            "type": "number"
          }
        },
        "required": [
          "query"
        ],
        "type": "object"
      },
      "name": "search_thoughts"
    },
    {
      "description": "Get a summary of all captured thoughts: totals, types, top topics, and people.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {},
        "type": "object"
      },
      "name": "thought_stats"
    }
  ]
}

What the leaf hashes

{"body":"2210e03989185eb7c53d38603a074e67cf7c0052502ab98cfe3eb5d6475ddd54","id":558790,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793135162894175,"prev":null,"subject":"21c5d7e9-2a7b-4207-a6b4-0e71c343bc05","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0x57d0b631a1f9c8c5b465c8bd8948bc22668fd5be7c7eeb3d60ae7f1d54a5a6de
2. 0x61256c55ac5b8a298aca00e93039d4c9a5c2a92362fc6f21c64f6f2eeded91ed
3. 0x871b0ed373788ca01ae56eb3bdfdc702ba6f97e50b9b67938aeabe8aaeea2b4e
4. 0xd1e3d2e363597fa594e4389895ea88b95bc3f4aad3a04974d86519dc632e1d38
5. 0x3eef222e4119f547b114b06508dd38ec701e56d29eba1f4966916b82fea2da80
6. 0x882ccf85737c9588bc962c7f43031fd1a894dd10759175225edc8a234e45a9e2
7. 0x42a519baddff9eb61aeccbc3355632c25750310adb576c2c6b3c9733b87551e4
8. 0x81f4ade36934461736a576591fa39e5880036581c7fe74e61f4b82a52063c90e
9. 0x749dd7810e93722b6a0c4fc7ddac9ca2a3d5962a59e4b37c145c876c24a0c37d
10. 0x5da26e96b9582f972c3c7dac75c33fb8a42b5b11e20794c0a6cd50d9aef25fe5
11. 0xe678c1cc136e18a65726dc5a13892d1977e8fac2970f7a2b8d2866a8ab83ef02
12. 0xe06cb1b692af263d62f5739bc4ad709ffe5a2576ef5a59a1610d50c03c7b9584
13. 0x906b5f0e8ef1fe7894886d84f460bb3239d5f14b14ad4adff27c7dcea6265169
14. 0x674bc1173d39130be4d15bbfc7327f8a8af87eb251e54c8d4409c7e840b9e538
15. 0xb78ea6a255dd06e2f402a1a733bca392fa6243920bcba95e8b80bdfc6ce5f553
16. 0x3ed50f053eca72dfd3a9d45a11935240bfe691e57835c367ddebe2cbc49efe9d
17. 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4