Verifiable receipt cd2c5430 — leadsignal result | Zambo

Verifiable receipt for a leadsignal call on Zambo: {"leads":[{"id":"reddit-197182446","title":"Water Pipe Running outside to fridge advice","summary":"table tr

What is this?

An AI agent did real work through Zambo, and this page is the proof. The SHA-256 hash below is a fingerprint of exactly what the agent produced — change one character of the output and the fingerprint changes. The timestamp shows when it ran. The Nostr anchor posts that fingerprint to public relays, so the record exists outside Zambo too — anyone can look it up by the event ID below. You don't have to take the agent's word for it. 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.

Observed result

{"leads":[{"id":"reddit-197182446","title":"Water Pipe Running outside to fridge advice","summary":"table tr td a href=\"https://www.reddit.com/r/Plumbing/comments/1wm7qua/water_pipe_running_outside_to_fridge_advice/\" img src=\"https://preview.redd.it/5zx57smfcuqh1.jpg?width=140&height=140&crop=1:1,smart&auto=webp&s=6b07fdaf0d06282b3e6a0f5c4dd4e05766f47540\" alt=\"Water Pipe Running outside to fridge advice\" title=\"Water Pipe Running outside to fridge advice\" / /a /td td class=\"md\" Hi Reddit, / I need some advice. In short, our builder didn’t connect the water pipe running from the","platform":"Reddit","location":"Austin, TX","actual_city":"Austin, TX","requested_city":"Austin, TX","location_match":true,"postedAt":"7h ago","minutesAgo":444,"score":80,"urgency":"high","contactInfo":"u//u/Deepy97 on Reddit | 💡 DM with your local rate and availability — first to respond wins","sourceUrl":"https://www.reddit.com/r/Plumbing/comments/1wm7qua/water_pipe_running_outside_to_fridge_advice/","jobDetails":"⚡ Today","outreachMessage":"Hi — I saw your post, “Water Pipe Running outside to fridge advice”. If this is still active, please share the best way to discuss the project and any timing or scope details."},{"id":"reddit-1210167868","title":"Drain/Waste Pipes - Up to Code or Compromised?","summary":"table tr td a href=\"https://www.reddit.com/r/Plumbing/comments/1wj305m/drainwaste_pipes_up_to_code_or_compromised/\" img src=\"https://preview.redd.it/cnk930rco4qh1.png?width=640&crop=smart&auto=webp&s=5fdca5f11f0097f1d441812a9d6512bd81bf6ee8\" alt=\"Drain/Waste Pipes - Up to Code or Compromised?\" title=\"Drain/Waste Pipes - Up to Code or Compromised?\" / /a /td td class=\"md\" We're trying to close on a home purchase and one of the inspection findings was damaged drain/waste pipes. The sell","platform":"Reddit","location":"Austin, TX","actual_city":"Austin, TX","requested_city":"Austin, TX","location_match":true,"postedAt":"3d ago","minutesAgo":5621,"score":80,"urgency":"critical","contactInfo":"u//u/matlockdown on Reddit | 💡 DM with your local rate and availability — first to respond wins","sourceUrl":"https://www.reddit.com/r/Plumbing/comments/1wj305m/drainwaste_pipes_up_to_code_or_compromised/","jobDetails":null,"outreachMessage":"Hi — I saw your post, “Drain/Waste Pipes - Up to Code or Compromised?”. If this is still active, please share the best way to discuss the project and any timing or scope details."}],"count":2,"trade":"Plumbing","city":"Austin, TX","requested_city":"Austin, TX","dashboard":"https://zambo.dev/leads/","_powered_by":"zambo.dev/leads"}

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Verification checks

Proof of observed execution

Receipt ID
cd2c5430-d7b2-4bb0-bcd0-351d0cee0606
SHA-256 output hash
sha256:6d3eddabc6a49133dde8c5ca9f530172a8e315128663e3ee8a7657d05f32d39d
Canonical bytes
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
Timestamp

Bound call context

Receipt schema
0.3
Tool name
leadsignal
Tool version
4.0.0
Permission scope
public
Caller type
anonymous
Caller ID
sha256:254e98ec7905ea79ed8f719ead45a8ed14e59453ba2633bad2b56e6b6a248e02
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
captured
Evidence SHA-256
sha256:ef0d753a5ebac184029234c2aa0b0cf0d242b8f6b6161e78479f50f6416181ae
Byte length
2572

Fetch exact evidence bytes

Neutral Nostr anchor

Event ID
3f89d783c6579ec804c28101bfbacdd26bc092a6a53c12f13dac0a7ec2814392
Anchor status
partial
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":"2026-09-21T16:43:23.457Z","evidence_byte_length":2572,"evidence_sha256":"sha256:ef0d753a5ebac184029234c2aa0b0cf0d242b8f6b6161e78479f50f6416181ae","evidence_url":"https://zambo.dev/api/evidence/ef0d753a5ebac184029234c2aa0b0cf0d242b8f6b6161e78479f50f6416181ae","output_sha256":"sha256:6d3eddabc6a49133dde8c5ca9f530172a8e315128663e3ee8a7657d05f32d39d","receipt_uuid":"cd2c5430-d7b2-4bb0-bcd0-351d0cee0606","schema_version":"zambo-receipt-anchor/1"}

Anchor status "partial": Published to some configured relay targets; publication was not confirmed by every configured relay.

Check this hash yourself

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

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