Evidence row 1479391

What was observed

{
  "endpoints": [
    [
      "web",
      "https://github.com/luca-network/spr"
    ]
  ],
  "name": "SPR (Sealed Payment Record)",
  "owner_address": null,
  "raw": {
    "_meta": {
      "io.modelcontextprotocol.registry/official": {
        "isLatest": true,
        "publishedAt": "2026-10-31T08:02:45.44538Z",
        "status": "active",
        "statusChangedAt": "2026-10-31T08:02:45.44538Z",
        "updatedAt": "2026-10-31T08:02:45.44538Z"
      }
    },
    "server": {
      "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
      "description": "Seal every payment your AI agent makes as a signed record, on your own machine, with your key.",
      "name": "network.luca/spr-mcp",
      "packages": [
        {
          "environmentVariables": [
            {
              "description": "The agent's ID, such as agt_research",
              "format": "string",
              "isRequired": true,
              "name": "SPR_AGENT_ID"
            },
            {
              "description": "The company the agent pays for",
              "format": "string",
              "isRequired": true,
              "name": "SPR_ENTITY"
            },
            {
              "description": "The book's folder (default ./spr-books); it holds the company's private key",
              "format": "string",
              "name": "SPR_DIR"
            },
            {
              "description": "The company's time zone for accounting dates (default UTC)",
              "format": "string",
              "name": "SPR_TIME_ZONE"
            },
            {
              "description": "on, to return the nonce to sign with each x402 intent",
              "format": "string",
              "name": "SPR_BINDING"
            }
          ],
          "identifier": "@luca-network/spr-mcp",
          "registryType": "npm",
          "transport": {
            "type": "stdio"
          },
          "version": "0.1.6"
        }
      ],
      "repository": {
        "source": "github",
        "url": "https://github.com/luca-network/spr"
      },
      "title": "SPR (Sealed Payment Record)",
      "version": "0.1.6",
      "websiteUrl": "https://github.com/luca-network/spr"
    }
  },
  "source": "mcp_registry",
  "summary": "Seal every payment your AI agent makes as a signed record, on your own machine, with your key."
}

What the leaf hashes

{"body":"a5cb1dedae62de27eb8dcd0d74bb97400e4309648674d1d25f5fb22df9ef314c","id":1479391,"kind":"listing","method":"sync.mcp_registry/1","observed_us":1793434552607159,"prev":1478728,"subject":"mcp_registry:network.luca/spr-mcp","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-31 (246033 rows).

1. 0xc9e982820b19e12270cfdbb49f0c1809747af370b46c8628f13d653bf0e01bc4
2. 0xd8b9d3a6d93a21e0abc8e71d13735fd6fa5c3b0849989d79d980f46edd46c9b2
3. 0x38711ce45451be0e04054112774a359887f586c16441b03c0d6c10b52d6b031e
4. 0x483bc0f6072f57b488b670be1b8b586e84870abeb7c476d144d640abf8e89802
5. 0x177d50246a29d9feebae769149e4dbce579e7cdbc4d6439b8435e7ebcc8e00f9
6. 0x239cd7b5b290d9d3ec406a9c81c312a8438947ddc682b1dc29cc993d659d910a
7. 0xfa8b1a33ab9265e2e0120588fbced11632b1ae304953b96d0286aed388b83cba
8. 0x965db905035a51f3fd1bf66e79e756e81005d9c6596f2fc420c64ce165280817
9. 0x06a9cb7ffc2fc6554442824833a351f51cefb35f9ec2637269d928b0f687e160
10. 0x17d2a4dce03f334cbf710888985af45cfabb0f9e280f9fa0d311a8e2ba5d28cf
11. 0xb17a403877dcdc345ee81cf1442485e3669e95c38222898256ba5deb61606e50
12. 0x9848da3b6eec1297925b29887f5848a0e34a120f4f695768d01669f03318e24c
13. 0xe0d6e3ecef4b18411e0b397b43270df35fb812a3310b2887db923fb26c7ba65e
14. 0x9b9c034ab0236a2e232e78d82d298819198dd0da36f638cae5260bb378f14798
15. 0xdd44ee37f508e0be8213cd488d246afd8e10e6e73374cc6074077c37270cda1e
16. 0x2e1cd25ce4079da9bfa6219d7ffec992149add4cd7d5c5b2cfee9908c1c8a5dd
17. 0x50003b3c3045b653f8be4232e95e80582cf5c54c14c509ba0a9a197b9e5005cb
18. 0x0504a25438f3c7932125463198ca74c5064f23f71a5c92763b3fc96a98cc8b57

Day root

0x24463725d1c0d9894bd6123691d532547aaa79f0762c0e45aa6a68acf1fd71ab

Chained

0x7d4824ff313dee7252a46f9d5c37b452851deb6c9f24a40c2f74ee0e53c82980

Published

On Arc Testnet, block 70093156: 0xedb7b832f4ebf6781b5ecd2ed241c435b862f4d3761541fa31adc1831b8c44a0