The ISNI, IPI, IPN and Registrant Code are unique identifiers for the various contributors of a music content.
The ISWC, ISRC and UPC are unique identifiers attributed to the music content itself.
All the contributors associated with a creative work, including a music content, should have an ISNI. This includes both creators (performers, musicians, authors, etc.) and other actors in the industrial chain (makers, record labels, etc.), whether they are individuals or organizations.
First, make sure you do not have one already:
http://www.isni.org/search
If you don't, simply contact a registrant agency such as
ICO http://isnimusique.ca
The International Standard Name Identifier (ISNI) is a standardized unique identifier administered by the International Standard Organisation (ISO).
It allows to distinguish homonyms and link aliases.
It serves as a link between various databases. It is recommended you send your ISNI to open databases such as MusicBrainz or Wikidata.
Authors, composers and publishers of a musical work.
To obtain your IPI, you must register as a member with a Collective Management Organization such as SOCAN.
An IPI will be assigned to you automatically.
If you already are a member of SOCAN, you can retrieve your IPI number by logging into your profile on their web site.
The Interested Parties Information (IPI) is a unique identifier for authors, composers, publishers, arrangers, adaptors and translators.
It is useful to Collective Management Organizations in order to properly distribute royalties amongst the various rights holders.
Performers: singers or musicians.
To obtain your IPN, you must register as a member with a Collective Management Organization for performers who is a member of SCAPR, such as ARTISTI. An IPN will be assigned to you automatically.
The IPN is not public. To access it, you need to make a request to your Collective Management Organization.
The International Performer Number (IPN) is a unique identifier for performers: singers or musicians.
It is useful to Collective Management Organizations for performers in order to properly distribute royalties amongst their rights holders by distinguishing people with the same names.
The first owner of a sound recording must request a Registrant Code.
To obtain your three characters Registrant Code, you simply need to submit an online request to Soproq.
Request Your ISRC Code
The Registrant Code is a three characters alpha-numeric code representing the first owner. Using this code, first owners can then create their own ISRC codes.
Important note: it is considered a best practice to use your own Registrant Code for all your sound recordings instead of relying on a third party.