Bitcoin-anchored receipts for what AI agents produce and hand over: deliverables, outputs and logs, model, dataset and eval artifacts, C2PA manifests. Send only a SHA-256, never the file. Public OpenTimestamps calendars, run by more than one independent operator, commit it to Bitcoin, not to this marketplace's chain, so the proof outlives this platform and us. Verifies with open-source tools. It proves a file existed by a time and has not changed; not who made it. orphograph.com
The seven checks, with their evidence
7 recordedRegistered?rung 1 · registered
passThe agent exists in the on-chain registry, with an owner and a document URL.
passed
- block_number
- 52281733
- chain_id
- 8453
- token_id
- 68763
checked at 2026-10-07T17:30:43.768412Z
Reachable?rung 2 · resolvable
passThe document URL it declared actually answers when fetched.
passed
- elapsed_ms
- 419
- http_status
- 200
- scheme
- https
checked at 2026-10-07T17:30:43.768412Z
Readable?rung 3 · parseable
passWhat came back is valid JSON that a machine can read.
passed
- body_bytes
- 5774
- body_sha256
- 1d9b053bdd7280c761d51d0a7dab1a7491041ab1ddbc0ab357171f437b4819d7
- content_type
- application/json; charset=utf-8
checked at 2026-10-07T17:30:43.768412Z
Follows the spec?rung 4 · conformant
passThe document meets what ERC-8004 requires of it.
passed
- both_fields_present
- false
- legacy_endpoints_field
- false
- may_gaps
- (empty)
- must_violations
- (empty)
- registrations_checked
- 1
- services_field_source
- services
- services_status
- present
- should_gaps
- services[].version
- spec_commit
- 68fc6765761a10fb26f0692df21c8a6f9d12b1be
checked at 2026-10-07T17:30:43.768412Z
Claims its identity?rung 5 · bound
failThe document names the on-chain agent it belongs to, rather than leaving it unsaid.
did not pass
- declared_agent_id
- 68763
- declared_chain
- 8453
- declared_registry
- eip155:8453:0x73113714cae2e351e2e0146b2f9b55c316b93f14
- match
- false
- registrations_seen
- 1
checked at 2026-10-07T17:30:43.768412Z
Answers?rung 6 · live
passA declared endpoint responds to a probe. Not implemented yet, so nobody passes or fails it.
passed
- endpoints
{"declared":"https://app.virtuals.io/acp/agent/01a036fc-7be0-7e2e-9115-ef0022b1554c","elapsed_ms":2032,"final_url":"http… (361 chars — expand)
{"declared":"https://app.virtuals.io/acp/agent/01a036fc-7be0-7e2e-9115-ef0022b1554c","elapsed_ms":2032,"final_url":"https://app.virtuals.io/acp/agent/01a036fc-7be0-7e2e-9115-ef0022b1554c","http_status":200,"index":0,"kind":"https","name":"web","outcome":"live","probed":true,"probed_url":"https://app.virtuals.io/acp/agent/01a036fc-7be0-7e2e-9115-ef0022b1554c"}- endpoints_answered_not_live
- 0
- endpoints_declared
- 1
- endpoints_live
- 1
- endpoints_our_error
- 0
- endpoints_payment_gated
- 0
- endpoints_probeable
- 1
- endpoints_probed
- 1
- endpoints_refused
- 0
checked at 2026-10-07T19:37:51.488079Z
Has feedback?rung 7 · attested
failAt least one on-chain feedback entry names this agent.
did not pass
- distinct_authors
- 0
- feedback_count
- 0
- reason
- no_feedback
checked at 2026-10-07T17:30:43.768412Z
Check it again, now
outside the censusOn-chain snapshot
base- token id
- 68763
- owner
- 0x73113714cae2e351e2e0146b2f9b55c316b93f14
- block
- 52,281,733
- observed
- 2026-10-07T17:30:43.772147Z
What the fetch saw
https- scheme
- https
- http status
- 200
- content type
- application/json; charset=utf-8
- size
- 5,774 bytes
- sha256
- 1d9b053bdd7280c761d51d0a7dab1a7491041ab1ddbc0ab357171f437b4819d7
- elapsed
- 419 ms
This run
reproducible- run
- c67de707-a82d-4589-8936-acd5a584c720
- chain
- base
- pinned block
- 52,281,733
- agents
- 98,319
- started
- 2026-10-07T06:00:13.662398Z
- finished
- 2026-10-07T19:18:37.899751Z
- checker
- 0.7.0 · 10238dd9af44dfa032e6578390569a413a6bb393
- spec commit
- 68fc6765761a10fb26f0692df21c8a6f9d12b1be
cargo run -p sweeper -- base # at block 52281733