Evidence row 579569

What was observed

{
  "count": 7,
  "tools": [
    {
      "description": "Overview of Common Cents, the Penny Press collection of 20 author-curated quotations in five themed clusters: the themes, quote count, and payment info for the $0.01 full machine-readable set.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {},
        "type": "object"
      },
      "name": "common_cents_info"
    },
    {
      "description": "Get the x402 payment details for one essay (price, network, asset, recipient wallet) so a machine buyer knows how to pay.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "slug": {
            "description": "Essay slug, e.g. river-of-time",
            "type": "string"
          }
        },
        "required": [
          "slug"
        ],
        "type": "object"
      },
      "name": "essay_payment_info"
    },
    {
      "description": "Look up a term in the Penny Press Lexicon (the author's own definitions of his political-economy vocabulary). Returns free metadata — part of speech and the essays where the term appears — plus payment info for the $0.01 full definition.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "term": {
            "description": "The term or its slug, e.g. 'fiat-order'",
            "type": "string"
          }
        },
        "required": [
          "term"
        ],
        "type": "object"
      },
      "name": "lexicon_lookup"
    },
    {
      "description": "Payment details for the Penny Press Lexicon full dataset snapshot ($0.25): every author-defined term with part of speech, definition, verbatim usage example, and source essays, as versioned JSON.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {},
        "type": "object"
      },
      "name": "lexicon_snapshot_info"
    },
    {
      "description": "List all published essays and fragments: titles, descriptions, prices, and reading URLs. Full text is free for humans at /read/{slug}; machine reads at /essays/{slug} are paid via x402 (USDC on Base).",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {},
        "type": "object"
      },
      "name": "list_essays"
    },
    {
      "description": "How to attest a work's fingerprint with LitWit ($0.05): what to submit, what the tamper-evident receipt contains, and the x402 payment details. The service never sees your work — only its hash.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {},
        "type": "object"
      },
      "name": "witness_attest_info"
    },
    {
      "description": "Check whether a SHA-256 content hash has been witnessed by LitWit, the Penny Press literary notary. Free. Returns the matching attestation entries (entry id, sequence, timestamp, title) or an empty result.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "content_hash": {
            "description": "Hex SHA-256 fingerprint of the work",
            "type": "string"
          }
        },
        "required": [
          "content_hash"
        ],
        "type": "object"
      },
      "name": "witness_verify"
    }
  ]
}

What the leaf hashes

{"body":"beea738bdef452ffa83d95ca0135455056fc803627aa5c3420048817d0383d82","id":579569,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793143484913889,"prev":null,"subject":"c9d6384c-af56-4217-bb74-dbdcb59066a0","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. 0x79595622b3effb3269db64e5c9b1ef41f020e942b74a6735f82b64712868c45b
2. 0x8d43acd3b0d480f04d8d2c4b305ef12f330bd6367d160cbee5f5659832e92bbf
3. 0x2a65f1c8c6997bab4402eb83c646a0061b0aefb8f9f54c4e1351c8c40cda2b09
4. 0xbcc87c6cc2401de6782977e241dcf2886ac877d6a2f20cfb0a35841196ac9d52
5. 0x72a8722e189d499dc516443921aaee636c82945fbba87062a5a9f84b7e9e4c16
6. 0x3d3c12ff1068488cad0766bcd8bdd8718f43dc7162852094b57e465c2ad5f360
7. 0xfd54838bd83e50eb67189f554ff3d4244d322f816db4ff244a44f1c47ebc4031
8. 0x89200a1818c2b4638ddbafab911169bc7475ebaf0ea247468a81315141accc83
9. 0x0da77fe7ffac648d3c87eea4dde61169cee956867463767ef43c4e050c3f9f5e
10. 0x5671db75eeaddc94dc4a891114e70d0b39acd13d96c8477b89a74e783ed1443e
11. 0x762b944704b581c24cf35c5d2505808d0ceccd237060a6074a4dc586ddf27b75
12. 0x0574b16d30fa9d3621e88c3779ea2cd142521826d4e75735f3ae6d4ed075cfc4
13. 0x8f2d125f5fe55a24b5da16577766eeaa13f24a272bb4c1c016f423ae917da681
14. 0x9848c068b1371232529d2b5738fdc45b854c57da041b69ea7c9e112b14e2d9d1
15. 0x275720ecabb68df33eee92ae4fd70572a8d952d6c61c061c2869cfc3217aa5c5
16. 0x23cf9bb4337ee8be7fcae368fd69d24c62c11fb45882127b4cd919bb96a19996
17. 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4