Schemas

Base64-encoded TimeStampResponse (TSR) from the TSA

Base64-encoded TimeStampQuery (TSQ) that was sent to the TSA

JSON-LD context for the credential

Unique identifier for the credential

Credential types indicating its structure and semantics

Identifier of the credential issuer, typically a DID

Start time when the credential becomes valid

Expiration time of the credential

Subject of the credential and its properties

Cryptographic proof of the credential

JWT signature proof of the credential

URL to the JSON schema used to validate the declaration structure. Must match pattern: https://w3id.org/(commonsdb|liccium)/schema/X.X.X.json with minimum version 0.2.0

URL to the JSON-LD context for the declaration. Must match pattern: https://w3id.org/(commonsdb|liccium)/context/X.X.X.json with minimum version 0.2.0

ISCC code identifying the digital content. Must be exactly 55 alphanumeric characters after 'ISCC:'

Title of the Work

Unix timestamp in milliseconds. Must be within 60 seconds of server time when submitting.

DID (Decentralized Identifier) of the declaring entity

Description of the Work

MIME type of the declared content

Base64-encoded image embedded as a Data URI, typically a small preview

A URL where users should be directed

The original source of the content, such as where it was first published

CIDv1 identifier of a previous declaration this one supersedes. Validation rules:

1. The referenced declaration must exist in the registry
2. The referenced declaration must not already be superseded by another declaration
3. Only the original declarer can supersede their own declaration - this is a security measure to prevent unauthorized modifications and cross-event attacks where different parties try to supersede the same declaration simultaneously

If any validation fails, a 422 error will be returned. A declaration can only be superseded once, and only by its original owner.

Version number of the declaration

Unique identifier for the entry from an authority source

Array of verifiable credentials. Must contain at least one credential.

Additional metadata from the data supplier

Optional plugin metadata (IPTC, TDM/AI, C2PA)

ISCC code (must match publicMetadata.iscc)

URL of the content at the supplier's repository

License URI. Must be a valid Creative Commons or Public Domain license. Allowed values include:

Public Domain:

• https://creativecommons.org/publicdomain/mark/1.0/
• https://creativecommons.org/publicdomain/zero/1.0/

CC BY (all versions 1.0-4.0, including country ports):

• https://creativecommons.org/licenses/by/4.0/
• https://creativecommons.org/licenses/by/3.0/
• etc.

CC BY-SA (all versions 1.0-4.0, including country ports):

• https://creativecommons.org/licenses/by-sa/4.0/
• https://creativecommons.org/licenses/by-sa/3.0/
• etc.

Unix timestamp in milliseconds. Must be within 60 seconds of server time.

Array of credentials with proof. Must contain at least one credential.

Optional reference to a previous declaration

JWT signature of the declaration metadata. Must use ES256 algorithm with JWK embedded in the header.

Timestamp Authority signature containing the timestamp request and response

JWT signature of the commonsDbRegistry metadata. Required when commonsDbRegistry is provided.

TSA signature for commonsDbRegistry. Required when commonsDbRegistry is provided.

Unique request identifier for tracking

Status message indicating the declaration was accepted

Environment where the declaration was processed

ISCC code of the submitted declaration

CIDv1 identifier generated for the declaration. Use this to track status via /v1/status/{identifier} endpoint.

API version

Error type or title

Detailed error message

ISCC code if available

Error type

Summary of the validation failure

Schema URL that was used for validation

Context URL that was used for validation

Schema version

Context version

List of specific validation errors

ISCC code if available