Like but different from ENS, Ordinals DIDs represent those human-readable DIDs inscribed on the Bitcoin blockchain with Ordinals protocol(Anyone can use Ordinals protocol to create DIDs with different suffixes). Currently, there are many Ordinals DIDs, such as .sats, .bitmap, .btc, .x, .bitter, .unisat and etc. Ordinals DIDs are completely decentralized, which means it neither has gatekeepers nor uses smart contracts, and all its records are stored on the Bitcoin blockchain.