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Bitcoin Universe Docs

OP Inscriptions

Content records written directly into OP_RETURN outputs rather than witness data.

Chain
Bitcoin
Carrier
OP_RETURN
Ownership model
utxo
Operations
inscribe, transfer
Also written
op-inscriptions, opinscriptions

Where it came from

Created outside Bitcoin Universe by The OP Inscriptions community, 2024.

Where the specification lives

The specification and reference documentation for OP Inscriptions live in bitcoinuniverseio/op-return and are published at https://bitcoinuniverseio.github.io/op-return/. That site is the authority. This page exists so you can find it and compare it with the rest of the estate.

Bitcoin Universe indexes or implements it in bitcoinuniverseio/index-opinscriptions.

Support in Bitcoin Universe products

Where it appears

  • Core: view, view-collection, view-activity, list, unlist, buy, settle, reconcile
  • Wallet: view, send, receive

Implemented

  • viewin-app-execution
  • view-collectionin-app-execution
  • view-activityin-app-execution
  • listin-app-execution
  • unlistin-app-execution
  • buyin-app-execution
  • settlein-app-execution
  • reconcilein-app-execution

Not implemented, and why

update-listing
OP Inscriptions listings must be cancelled and relisted; no atomic listing update is implemented.
make-offer
OP Inscriptions has no executable offer workflow on this marketplace surface.
accept-offer
OP Inscriptions has no executable offer workflow on this marketplace surface.
cancel-offer
OP Inscriptions has no executable offer workflow on this marketplace surface.
sell
OP Inscriptions has no executable offer workflow on this marketplace surface.

Operational behaviour

Indexing

State is read from Standalone OP Inscriptions indexer for catalog reads. Supporting reads come from Universe raw-block OP_RETURN scanner and SQL cache.

What must be true before any change is accepted: Live title receipt is re-resolved, but indexer tip lag is not compared with node tip.

Confirmation

A fill is recorded only after the exact receipt spend, buyer receipt, and seller payout are confirmed on-chain.

Settlement requires at least 1 confirmation.

Reorganisation

The OP Inscriptions reconciler reopens canonically unspent receipts and marks conflicting spends stale.

Freshness

Ownership is checked per mutation; no numeric indexer lag threshold is enforced.

Provenance

Capability facts on this page were generated from backend/packages/ecosystem-contracts/lib/protocols.js in bitcoinuniverseio/core at 15dd03b5986a. Implemented behaviour is not the same as production availability: see how to read our status.