Verifiable receipt 968a9ab7 - pdf_extract result | Zambo

Verifiable receipt for a pdf_extract call on Zambo: {"url":"https://zambo.dev/aer-1/","content_type":"text/html","word_count":3268,"extracted_text":"AER-1 (draf

Observed result

{"url":"https://zambo.dev/aer-1/","content_type":"text/html","word_count":3268,"extracted_text":"AER-1 (draft-zambo-aer1-10) - AI Agent Execution Receipt Open Draft | Zambo\n\nSkip to content\n\nZ ZAMBO.DEV\n\nMENU\n\nAdd  Tools  Receipts  Continuity  AER-1  Pricing  Agents  Docs\n\nAER-1 / AI AGENT EXECUTION RECEIPT\n\nAER-1: the open draft for portable execution receipts\n\nCanonical definition  An AI agent execution receipt is a verifiable record of one AI agent tool call. It identifies the execution, preserves the exact bytes used for its output commitment, records the tool and time, and gives a revi","summary":"- **Purpose & Scope** – AER‑1 is an *open‑draft specification* for a portable “AI Agent Execution Receipt” that records a single tool call made by an AI agent, enabling verifiable auditability of AI‑generated outputs.  \n- **Core Components** – Each receipt contains:  \n  1. **Execution ID** (unique identifier)  \n  2. **Tool name & version**  \n  3. **Timestamp** (UTC, ISO‑8601)  \n  4. **Input payload** (exact bytes)  \n  5. **Output commitment** (hash of the raw output bytes)  \n  6. **Optional metadata** (e.g., user context, environment).  \n- **Verification Mechanism** – The receipt’s hash is signed by the tool’s private key, allowing third parties to confirm that the output was produced by the claimed tool at the recorded time without revealing the raw output.  \n- **Interoperability & Standards** – AER‑1 adopts JSON‑LD for schema, uses SHA‑256 for hashing, and is designed to be machine‑readable across platforms (e.g., Zambo, OpenAI, Anthropic).  \n- **Conclusion & Next Steps** – The draft calls for community review, encourages implementation in existing AI toolchains, and envisions future extensions (e.g., chaining multiple receipts, embedding in blockchain ledgers) to support transparency, compliance, and trust in autonomous AI systems.","note":"Text truncated to 500 chars. Full document is 22243 chars."}

Verify this receipt

This is a verifiable receipt: the result above is hashed and timestamped at a permanent URL.

Provenance for every timeline entry

EXECUTED BY ZAMBOZambo ran the tool call itself.
OBSERVED VIA GATEWAYA Zambo gateway observed request and response bytes from the named external executor. Zambo did not run that external action.
LOGGED BY AGENTAn agent or local hook reported the action. Zambo attests that the record is unchanged since logging, not that the action happened as described.

Private agent reasoning, built-in client actions, and direct calls to unrelated MCP servers are not included unless an agent or gateway reports them.

What is this?

An AI agent completed a tool call through Zambo, and this page records the result. The SHA-256 hash below fingerprints exactly what the agent produced. The timestamp shows when it ran. The Nostr anchor posts that fingerprint to public relays, so the record exists outside Zambo too. Check the hash yourself.

What is an execution receipt?

An execution receipt is the public record of one completed AI agent tool call. Read the canonical definition of an AI agent execution receipt.

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Verification checks

Integrity check: Recomputable from canonical bytes
Issued by zambo.dev: Served from the zambo.dev receipt store
Chain valid: Receipt hash chain is internally consistent
Recorded in the immutable log: 2026-10-04T11:03:32.875Z

Proof of observed execution

EXECUTED BY ZAMBO

Receipt ID: 968a9ab7-5d48-4a77-a473-7a28ca7875da
SHA-256 output hash: sha256:3ba4160abbde740a62219f46cf4f08aaf260c6bf7cce17a888dd13813d5daaac
Canonical bytes: eyJjYWxsZXIiOnsiaWQiOiJzaGEyNTY6YjUwN2U4YzQ2M2I3ZGZiYjAwMmJiNWQyNDY1MGU1ZTA5YTc1NmM0YzI2MjU5NzQyOGNjODhjNmQxMmNkMWE5NCIsInR5cGUiOiJhbm9ueW1vdXMifSwib3V0cHV0Ijp7ImNvbnRlbnRfdHlwZSI6InRleHQvaHRtbCIsImV4dHJhY3RlZF90ZXh0IjoiQUVSLTEgKGRyYWZ0LXphbWJvLWFlcjEtMTApIC0gQUkgQWdlbnQgRXhlY3V0aW9uIFJlY2VpcHQgT3BlbiBEcmFmdCB8IFphbWJvXG5cblNraXAgdG8gY29udGVudFxuXG5aIFpBTUJPLkRFVlxuXG5NRU5VXG5cbkFkZCAgVG9vbHMgIFJlY2VpcHRzICBDb250aW51aXR5ICBBRVItMSAgUHJpY2luZyAgQWdlbnRzICBEb2NzXG5cbkFFUi0xIC8gQUkgQUdFTlQgRVhFQ1VUSU9OIFJFQ0VJUFRcblxuQUVSLTE6IHRoZSBvcGVuIGRyYWZ0IGZvciBwb3J0YWJsZSBleGVjdXRpb24gcmVjZWlwdHNcblxuQ2Fub25pY2FsIGRlZmluaXRpb24gIEFuIEFJIGFnZW50IGV4ZWN1dGlvbiByZWNlaXB0IGlzIGEgdmVyaWZpYWJsZSByZWNvcmQgb2Ygb25lIEFJIGFnZW50IHRvb2wgY2FsbC4gSXQgaWRlbnRpZmllcyB0aGUgZXhlY3V0aW9uLCBwcmVzZXJ2ZXMgdGhlIGV4YWN0IGJ5dGVzIHVzZWQgZm9yIGl0cyBvdXRwdXQgY29tbWl0bWVudCwgcmVjb3JkcyB0aGUgdG9vbCBhbmQgdGltZSwgYW5kIGdpdmVzIGEgcmV2aSIsIm5vdGUiOiJUZXh0IHRydW5jYXRlZCB0byA1MDAgY2hhcnMuIEZ1bGwgZG9jdW1lbnQgaXMgMjIyNDMgY2hhcnMuIiwic3VtbWFyeSI6Ii0gKipQdXJwb3NlICYgU2NvcGUqKiDigJMgQUVS4oCRMSBpcyBhbiAqb3BlbuKAkWRyYWZ0IHNwZWNpZmljYXRpb24qIGZvciBhIHBvcnRhYmxlIOKAnEFJIEFnZW50IEV4ZWN1dGlvbiBSZWNlaXB04oCdIHRoYXQgcmVjb3JkcyBhIHNpbmdsZSB0b29sIGNhbGwgbWFkZSBieSBhbiBBSSBhZ2VudCwgZW5hYmxpbmcgdmVyaWZpYWJsZSBhdWRpdGFiaWxpdHkgb2YgQUnigJFnZW5lcmF0ZWQgb3V0cHV0cy4gIFxuLSAqKkNvcmUgQ29tcG9uZW50cyoqIOKAkyBFYWNoIHJlY2VpcHQgY29udGFpbnM6ICBcbiAgMS4gKipFeGVjdXRpb24gSUQqKiAodW5pcXVlIGlkZW50aWZpZXIpICBcbiAgMi4gKipUb29sIG5hbWUgJiB2ZXJzaW9uKiogIFxuICAzLiAqKlRpbWVzdGFtcCoqIChVVEMsIElTT+KAkTg2MDEpICBcbiAgNC4gKipJbnB1dCBwYXlsb2FkKiogKGV4YWN0IGJ5dGVzKSAgXG4gIDUuICoqT3V0cHV0IGNvbW1pdG1lbnQqKiAoaGFzaCBvZiB0aGUgcmF3IG91dHB1dCBieXRlcykgIFxuICA2LiAqKk9wdGlvbmFsIG1ldGFkYXRhKiogKGUuZy4sIHVzZXIgY29udGV4dCwgZW52aXJvbm1lbnQpLiAgXG4tICoqVmVyaWZpY2F0aW9uIE1lY2hhbmlzbSoqIOKAkyBUaGUgcmVjZWlwdOKAmXMgaGFzaCBpcyBzaWduZWQgYnkgdGhlIHRvb2zigJlzIHByaXZhdGUga2V5LCBhbGxvd2luZyB0aGlyZCBwYXJ0aWVzIHRvIGNvbmZpcm0gdGhhdCB0aGUgb3V0cHV0IHdhcyBwcm9kdWNlZCBieSB0aGUgY2xhaW1lZCB0b29sIGF0IHRoZSByZWNvcmRlZCB0aW1lIHdpdGhvdXQgcmV2ZWFsaW5nIHRoZSByYXcgb3V0cHV0LiAgXG4tICoqSW50ZXJvcGVyYWJpbGl0eSAmIFN0YW5kYXJkcyoqIOKAkyBBRVLigJExIGFkb3B0cyBKU09O4oCRTEQgZm9yIHNjaGVtYSwgdXNlcyBTSEHigJEyNTYgZm9yIGhhc2hpbmcsIGFuZCBpcyBkZXNpZ25lZCB0byBiZSBtYWNoaW5l4oCRcmVhZGFibGUgYWNyb3NzIHBsYXRmb3JtcyAoZS5nLiwgWmFtYm8sIE9wZW5BSSwgQW50aHJvcGljKS4gIFxuLSAqKkNvbmNsdXNpb24gJiBOZXh0IFN0ZXBzKiog4oCTIFRoZSBkcmFmdCBjYWxscyBmb3IgY29tbXVuaXR5IHJldmlldywgZW5jb3VyYWdlcyBpbXBsZW1lbnRhdGlvbiBpbiBleGlzdGluZyBBSSB0b29sY2hhaW5zLCBhbmQgZW52aXNpb25zIGZ1dHVyZSBleHRlbnNpb25zIChlLmcuLCBjaGFpbmluZyBtdWx0aXBsZSByZWNlaXB0cywgZW1iZWRkaW5nIGluIGJsb2NrY2hhaW4gbGVkZ2VycykgdG8gc3VwcG9ydCB0cmFuc3BhcmVuY3ksIGNvbXBsaWFuY2UsIGFuZCB0cnVzdCBpbiBhdXRvbm9tb3VzIEFJIHN5c3RlbXMuIiwidXJsIjoiaHR0cHM6Ly96YW1iby5kZXYvYWVyLTEvIiwid29yZF9jb3VudCI6MzI2OH0sInJlY2VpcHRfc2NoZW1hX3ZlcnNpb24iOiIwLjMiLCJzaWRlX2VmZmVjdHMiOnsiZGVjbGFyYXRpb25faGFzaCI6InNoYTI1Njo0NWFhZDM4ZjNhYTk4MmI5YWFmZTkyZWNiNDE2ZWJlOTg3OTFlZGRiYWY4YWI2ZGYwYmQwODYwNWI3YzFiZmVlIiwiZGVjbGFyZWQiOlsibm9uZSJdLCJzY2hlbWFfdmVyc2lvbiI6InphbWJvLXNpZGUtZWZmZWN0cy8xIn0sInRvb2wiOnsibmFtZSI6InBkZl9leHRyYWN0Iiwic2NvcGUiOiJwdWJsaWMiLCJ2ZXJzaW9uIjoiNC4wLjAifX0=
Timestamp: 2026-10-04T11:03:32.875Z

Bound call context

Receipt schema: 0.3
Tool name: pdf_extract
Tool version: 4.0.0
Permission scope: public
Caller type: anonymous
Caller ID: sha256:b507e8c463b7dfbb002bb5d24650e5e09a756c4c262597428cc88c6d12cd1a94
Declared side effects: none
Side-effects schema: zambo-side-effects/1
Declaration hash: sha256:45aad38f3aa982b9aafe92ecb416ebe98791eddbaf8ab6df0bd08605b7c1bfee

This records what the server-side tool contract declared at call time. It does not independently verify that a downstream side effect happened.

Bound upstream evidence

Status: no_upstream_bytes_captured
Evidence SHA-256: unavailable
Byte length: unavailable

Neutral Nostr anchor

Event ID: 6f1976ab869f90c9ee7e044645718122d67b9071a186c80089355c0c3a500852
Anchor status: published
Public key: e13475107d30c918ec664adf2ab1141024a22fb35190f82c9e933704fa49af41

Relay hints: wss://relay.damus.io · wss://nos.lol · wss://relay.primal.net

Schema: zambo-receipt-anchor/1

Anchor envelope bytes:

{"anchored_at":"2026-10-04T11:03:32.861Z","evidence_byte_length":null,"evidence_sha256":null,"evidence_url":null,"output_sha256":"sha256:3ba4160abbde740a62219f46cf4f08aaf260c6bf7cce17a888dd13813d5daaac","receipt_uuid":"968a9ab7-5d48-4a77-a473-7a28ca7875da","schema_version":"zambo-receipt-anchor/1"}

Anchor status "published": Published to all configured relay targets.

Check this hash yourself

Open the verification endpoint. The server recomputes the SHA-256 from the stored bytes and answers verified:true. If it does not say verified, do not trust this page. See the Nostr anchor event on a public viewer. The fingerprint is timestamped outside Zambo too.

Embed this receipt

Markdown

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HTML

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