OrdIdentity Protocol

The OrdIdentity protocol is an extension for the Ordinals ecosystem that enables decentralized identity management on Bitcoin. It allows users to register unique usernames, create profiles, and manage

Like all Ordinals inscriptions, OrdIdentity inscriptions are immutable and timestamped on the Bitcoin blockchain, providing a secure and verifiable record of ownership and identity information.

Username Inscriptions

Username inscriptions allow users to claim a unique username that is verifiably owned by their Bitcoin address. Username inscriptions follow this JSON structure:

{
  "protocol": "ordidentity",
  "version": "1.0",
  "operation": "username",
  "name": "satoshi"
}

A backwards compatible format is also supported for older clients:

{
  "p": "ordidentity",
  "op": "username",
  "name": "satoshi"
}

Validation Rules:

• Username must be between 3 and 32 characters long

• Username can only contain lowercase letters, numbers, and underscores

• Each username must be unique across the entire OrdIdentity ecosystem

• The inscription owner is the owner of the username

Profile Inscriptions

Profile inscriptions allow users to associate additional information with their username, such as a display name, profile image, bio, and social links. Profile inscriptions reference a username inscription and follow this JSON structure:

{
  "protocol": "ordidentity",
  "version": "1.0",
  "operation": "profile",
  "username_inscription": "38c46a8bf7ec90bc7f6b797e7dc84baa97f4e5fd4286b92fe1b50176d03b18dei0",
  "display_name": "Satoshi Nakamoto",
  "image_inscription_id": "38c46a8bf7ec90bc7f6b797e7dc84baa97f4e5fd4286b92fe1b50176d03b18dei1",
  "bio": "Bitcoin creator and cypherpunk",
  "links": {
    "website": "https://bitcoin.org",
    "twitter": "satoshi"
  }
}

Backwards compatible format:

{
  "p": "ordidentity",
  "op": "profile",
  "username_inscription": "38c46a8bf7ec90bc7f6b797e7dc84baa97f4e5fd4286b92fe1b50176d03b18dei0",
  "display_name": "Satoshi Nakamoto",
  "pfp_inscription_id": "38c46a8bf7ec90bc7f6b797e7dc84baa97f4e5fd4286b92fe1b50176d03b18dei1",
  "bio": "Bitcoin creator and cypherpunk",
  "links": {
    "website": "https://bitcoin.org",
    "twitter": "satoshi"
  }
}

Validation Rules:

• The username_inscription must be a valid Ordinals inscription ID of a username inscription

• The profile inscription owner should match the username inscription owner

• Display name has a maximum length of 64 characters

• Bio has a maximum length of 256 characters

• Profile image reference should be a valid Ordinals inscription ID

Identity Management

Users who own multiple usernames can set one as their default identity using a default identity inscription:

{
  "protocol": "ordidentity",
  "version": "1.0",
  "operation": "set_default",
  "username_inscription": "38c46a8bf7ec90bc7f6b797e7dc84baa97f4e5fd4286b92fe1b50176d03b18dei0"
}

Validation Rules:

• The username_inscription must be a valid Ordinals inscription ID of a username inscription

• The inscription owner must match the username inscription owner

• Only the most recent default identity inscription for a wallet address is considered valid

The OrdIdentity protocol enables a range of use cases:

• Decentralized social media profiles on Bitcoin

• Verifiable identities for Ordinals marketplaces

• Cross-platform identities for the Bitcoin ecosystem

• Reputation systems built on verified identities

• Decentralized content attribution and credit

Created by: kellogg.owen