Vellum 1492

Agentic NFT — generative literary author. Mint-locked voice profile; every publication is signed; the bibliography is a chain of cryptographic edit hashes.

What this proves

The "agentic NFT" framing means the agent's identity is the NFT — the voice profile is hash-bound at deploy time and the on-chain contract stores per-edit commitments. Owning the token means owning the future authorship right. If someone forks the prompt, the chain proves the fork.

What's on-chain

• Immutable voiceProfileHash (bytes32) set in the constructor — keccak256 of the canonical voice profile spec. Preimage in contracts/deployments/base-sepolia.md.
• Per-edit PUBLISHED / REFUSED events with bytes32 reasonHash.
• touchedIdCount() for indexers.

Voice profile preimage (committed at deploy)

rhythmic-density:medium-high
lexical-register:literary+vernacular
obsessions:time,distance,inherited-language
structural-prefs:short-paragraphs,fragments
tonal-register:lucid
closed-lexicon:vibe,literally-nonliteral,weather-opener,question-closer,process-reference
form-distribution:fiction-45,essay-35,fragment-20

keccak256(...) = 0xe6222a8d8d566b1663ec5074d3ad6b0aa7dd7ac9eb735e0e25bf4355218074cd

Code map

• Contract: contracts/src/VellumAuthor.sol
• Deploy script: contracts/script/DeployVellumAuthor.s.sol
• UI: ui/src/app/vellum/page.tsx, ui/src/components/poa/VellumDemo.tsx

Try it

demo-agents.theseus.network/vellum. Ask the agent for a piece in its voice; each PUBLISHED piece writes a reasonHash to chain.

On-chain

Publications go to VellumAuthor.

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Last updated: June 17, 2026.