OP Inscriptions

Source bitcoinuniverseio/core (private)

Path backend/packages/ecosystem-contracts/lib/protocols.js

Chain bitcoin

Network mainnet

Lifecycle enabled

Verified 2026-09-01

AvailabilityEnabledSwitched on in the shipped build. The actions marked supported below are the ones Core can execute.

ChainbitcoinOwnership model: utxo. Decimals: none.

Actions supported8 / 13Trading actions are declared supported for this protocol.

Feature gateNoneNo gate stands between the shipped build and the actions below.

Execution model

Core builds and validates the transaction; your wallet signs it.

Registry values

Execution mode

in-app-execution

Owning surface

main

Availability

enabled

Feature gate

null

Aliases accepted

op-inscriptionsopinscriptions

Address roles

ordinals

Actions

Action	Supported	Mode, or the reason it is not
View	Yes	Core builds and validates the transaction; your wallet signs it.
View collection	Yes	Core builds and validates the transaction; your wallet signs it.
View activity	Yes	Core builds and validates the transaction; your wallet signs it.
List	Yes	Core builds and validates the transaction; your wallet signs it.
Update listing	No	OP Inscriptions listings must be cancelled and relisted; no atomic listing update is implemented.
Delist	Yes	Core builds and validates the transaction; your wallet signs it.
Buy	Yes	Core builds and validates the transaction; your wallet signs it.
Make offer	No	OP Inscriptions has no executable offer workflow on this marketplace surface.
Accept offer	No	OP Inscriptions has no executable offer workflow on this marketplace surface.
Cancel offer	No	OP Inscriptions has no executable offer workflow on this marketplace surface.
Sell	No	OP Inscriptions has no executable offer workflow on this marketplace surface.
Settle	Yes	Core builds and validates the transaction; your wallet signs it.
Reconcile	Yes	Core builds and validates the transaction; your wallet signs it.

Why the rest are unavailable

• Update listing

  OP Inscriptions listings must be cancelled and relisted; no atomic listing update is implemented.

• Make offerAccept offerCancel offerSell

  OP Inscriptions has no executable offer workflow on this marketplace surface.

Source of truth

Question	What answers it
Which orders exist	Universe SQL OP inscription market orders
Who owns the asset	Current OPI title receipt resolved through a mempool-compatible Bitcoin API
Whether a trade settled	Exact title-outpoint spend and buyer receipt output observed through the Bitcoin API
What the protocol state is	Standalone OP Inscriptions indexer for catalog reads

Indexer

Primary index

Standalone OP Inscriptions indexer for catalog reads

Fallbacks

• Universe raw-block OP_RETURN scanner and SQL cache

What a mutation must prove

Live title receipt is re-resolved, but indexer tip lag is not compared with node tip.

Freshness, confirmation, and reorg policy

Policy	Value	What the registry states
Freshness enforced	No	Ownership is checked per mutation; no numeric indexer lag threshold is enforced.
Maximum index lag	not set	No numeric block-lag ceiling is configured for this protocol.
Maximum observation age	not set	No maximum age is configured for an observation used by a mutation.
Listing confirmations	not set	A fill is recorded only after the exact receipt spend, buyer receipt, and seller payout are confirmed on-chain.
Settlement confirmations	1	A trade is recorded as settled after 1 confirmation.
Automatic reorg reconciliation	Yes	The OP Inscriptions reconciler reopens canonically unspent receipts and marks conflicting spends stale.

Where else this protocol appears

The Bitcoin Universe registry records actions per product surface. Core is the main surface. The others are named here because a reader who cannot do something in Core may be able to do it in a sibling product.

Surface	Actions recorded
Coremain	viewdiscoverview-collectionview-activityview-transactionlistunlistbuysettlereconcile
Walletwallet	viewsendreceive

Read this alongside

• The support matrix, for how OP Inscriptions compares with the other 28 marketplace protocols.
• How to read a protocol row, for what each value on this page means.
• Market safety, before acting on anything here.