Metadata and media

EVM (ERC-721)#

jsonCopy
{
  "name": "Genesis Bugz #1",
  "description": "…",
  "image": "ipfs://<cid>/1.png",
  "external_url": "https://www.unvault.com/bugz",
  "attributes": [
    { "trait_type": "Background", "value": "Swamp" },
    { "trait_type": "Generation", "value": 1, "display_type": "number" }
  ]
}

Contract-level metadata (ERC-7572) provides name, description, image, banner_image, external_link and collaborators.

Solana (Metaplex)#

Metaplex token metadata JSON with symbol, seller_fee_basis_points, properties.files and properties.creators.

Storage#

Pin media and metadata on IPFS (with at least two pinning services) or Arweave. Reveal flows should publish metadata after mint by updating the base URI and emitting ERC-4906 BatchMetadataUpdate.