An inscription is arbitrary data, such as an image, text or document, written directly onto an individual satoshi on the Bitcoin blockchain so that the content is stored entirely on-chain. Enabled by the Taproot upgrade and the Ordinals numbering scheme, inscriptions embed their payload in the witness portion of a transaction, making each inscribed satoshi a verifiable, transferable digital artefact. They underpin Bitcoin-native non-fungible assets and digital collectibles without relying on external metadata storage.
- An inscription writes arbitrary content directly onto an individual Satoshi using the Ordinals scheme, storing the payload on the Bitcoin Blockchain itself rather than in external storage. It turns each inscribed coin into a verifiable Digital Asset.
Overview
- Inscriptions became possible after the Taproot soft fork relaxed limits on witness data, allowing larger payloads to be committed within a transaction at modest cost.
- Because the content lives on-chain, an inscription carries strong durability and verifiability guarantees: anyone running a full node can reconstruct the artefact without trusting a third-party host.
- The approach contrasts with conventional token standards that store only a pointer to off-chain metadata, and it has driven a wave of Bitcoin-native collectibles and experiments.
Mechanisms
- Content is committed in a Taproot script-path spend and revealed in the witness of a later transaction.
- The Ordinals theory assigns each satoshi a stable serial number, giving the inscription a unique carrier.
- Transfer of the inscribed satoshi moves ownership of the artefact, tracked by sat-aware wallets and indexers.
- Multiple media types are supported, identified by a content-type field embedded alongside the payload.
- Indexers parse the chain to present inscriptions as collectibles to users and marketplaces.
Applications
- Minting Bitcoin-native Non-Fungible Token artefacts and Digital Art.
- Recording immutable Provenance and authenticity claims fully on-chain.
- Trading inscribed satoshis through an NFT Marketplace and specialised wallets.
- Embedding documents or arbitrary Metadata for long-term archival.