For the original proquint specification, see: https://arxiv.org/html/0901.4016 (/ipfs/bafybeib5jsyi5igjwhi7hzkfebpvnq2ykbwpxeaaxlkyfyxqvcecoao4qa).
The multibase prefix for proquints is the character p. The base encoded data is the encoded data according to the original specification, with an additional ro- prefix:
<multibase-prefix-character><additional-prefix-characters><proquint-encoded-data>
The resulting full prefix for the actual proquint encoded data is pro-, making multibase-encoded proquints easily pronouncable.
For example, the proquint encoding of the bytestring [127, 0, 0, 1] (the data for the IPv4 address 127.0.0.1) is lusab-babad, so the corresponding multibase-encoded proquint bytestring is:
pro-lusab-babad