XAJIBASILAAR

Early bitcoin NFTs were not immutable.

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

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

xcpcards.com/XAJIBASILAAR mc64gFxg

The identifier mc64gFxg 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 XAJIBASILAAR one of the first real crypto cards!

Techincal Details

The file's full sha-256 hash in hex and base64 encodings:
99ceb8805c60ba1443d63cb062431eb44ee60c846dd49b097fd277fd3101aeb1
mc64gFxguhRD1jywYkMetE7mDIRt1JsJf9J3/TEBrrE=

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.