LOCHNESS


Early bitcoin NFTs were not immutable.

In November 2015, XCPCARDS.com solved this for several cards, LOCHNESS included.

This was achieved by including the following text in a bitcoin transaction:

xcpcards.com/lochness QKr+5saa

The identifier QKr+5saa is the jpeg's checksum which proves the card's design. Since this text is engraved on the blockchain, the proof can never be tampered with, nor can the timestamp be disputed.

This makes LOCHNESS one of the first real crypto cards!

Techincal Details

The file's full sha-256 hash in hex and base64 encodings:
40aafee6c69a46389ca92c5749d9dc4512a6a7016ffc10cdb34a89734a5d6955
QKr+5saaRjicqSxXSdncRRKmpwFv/BDNs0qJc0pdaVU=

The identifier is a 48 bit truncated hash.

This is sufficiently strong, yet short enough to have the text fit inside a Bitcoin op_return message.

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Full Set of Cards

The below cards were notarized by XCPCARDs.com

Most are from the Spells of Genesis project.

Click a card to view its details.