A standard for preserving culture and history with NFTs

Enhancing the discoverability, connectivity, and collectability of culturally and historically significant NFTs

Culture and History on the Blockchain

Culture and Historical Asset Token (CHAT) is an Ethereum token standard that is fully compatible with ERC721 and ERC1155.

Provenance and context

The CHAT standard provides comprehensive context and provenance needed to establish significance and value for NFTs of historical assets.

Connectivity

The CHAT standard allows us to connect our history on the blockchain, providing connectivity across NFTs, regardless of the medium, issuer, asset type.

Open Source

The CHAT standard is released under the Creative Common Zero (CC0) License, meaning it’s completely open source.

Interoperable

The CHAT standard ensures seamless integration and interaction among various platforms, making NFTs of historical assets truly interoperable.

We want to hear from you

Have questions or comments? We encourage open discourse on our standard.

interface HistoricalAssetMetadata {
    name: string;
    description: string,
    image: string;
    properties: {
        id: string;
        summary: string;
        assetType:
            "newspaper_cover"
            | "magazine_a1_cover"
            | "newspaper_article"
            | "magazine_article"
            | "photo"
            | "graphic"
            | "video"
            | "audio"
            | "3d_object"
            | "others";
        issuers: string[];
        issueTimestamp: string;
        edition: number;
        editionCount: number;
        fileURI: string;
        fileSize: number;
        fileFormat: string;
        seriesName?: string;
        assetFullText?: string;
        assetCreators?: string[];
        earliestPossibleCreationDate?: string;
        latestPossibleCreationDate: string;
        assetCreationLocations?: string[];
        assetCreationCoordinates?: string[];
        relevantDates?: string[];
        relevantGeos?: string[];
        relevantLocations?: string[];
        relevantPeople?: string[];
        relevantEntities?: string[];
        assetLanguages?: string[];
        assetHeight?: string;
        assetWidth?: string;
        assetDepth?: string;
        assetFileURI?: string;
        assetFileSize?: number;
        assetCopyrightHolder?: string;
        assetCopyrightDocumentURI?: string;
        assetProvenanceRecordURI?: string;
        isPhysicalAsset?: boolean;
        assetMedium?: string;
        assetFormFormat?: string;
        issuerNotes?: string;
        tokenReplaced?: string;
        tokenReferenced?: string;
        isOwnerTokenCopyrightRightHolder?: boolean;
        isOwnerAssetCopyrightRightHolder?: boolean;
        assetCopyrightRightDocumentURI?: string;
        isOwnerTokenReprintRightHolder?: boolean;
        tokenReprintRightDocumentURI?: string;
        isOwnerAssetReprintRightHolder?: boolean;
        assetReprintRightDocumentURI?: string;
        isEligibleForRelatedTokenAirdrops?: boolean;
        isEligibleForMetaverseAccess?: boolean;
    }
}

Explore the Standard

Explore

the Standard

Culture and Historical Asset Token (CHAT) is an Ethereum token standard that is fully compatible with ERC721 and ERC1155.