GENET


Early bitcoin NFTs were not immutable.

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

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

xcpcards.com/genet JTh/QRy2

The identifier JTh/QRy2 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 GENET one of the first real crypto cards!

Techincal Details

The file's full sha-256 hash in hex and base64 encodings:
25387f411cb6ef24588b50a440a23c6e0fab5f7a2682d35fdd590ff6b811273f
JTh/QRy27yRYi1CkQKI8bg+rX3omgtNf3VkP9rgRJz8=

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.