Parity Technologies, a subsidiary of Polkadot Gavin Wood, is about to launch a Web3 authentication solution called Proof-of-Ink, which aims to prove users' digital identities in a form that protects privacy through a unique tattoo. Proof-of-Ink is expected to be available in the fourth quarter of 2024, according to Gavin Wood. Users will be required to get a unique, algorithmically generated tattoo on a specific body part, and by uploading the last three minutes of video of the tattoo process as proof of digital identity. In addition, users will be required to pay a small amount of DOT tokens or community-shared vouchers to prevent abuse.