A GRid consists of 18 alphanumerical characters (numerical digits and capital letters as defined in ISO/IEC 646:1991-IRV, which is identical to ASCII) that are grouped into four elements as follows:
When a GRid is written, printed or otherwise visually presented, the four elements of the GRid should be separated from each other by a hyphen. For clarity, it can also be prefixed with “GRid:”. Neither the hyphens nor the “GRid:”-prefix form part of the GRid. It is recommended that when a GRid is visually presented, the font used should clearly distinguish between the digits ‘1’ and ‘0’ on the one hand, and the letters ‘I’ and ‘O’ on the other hand.
The following character strings all denote the same GRid:
Where:
GRid codes can be registered through becoming a GRid issuer with the IFPI1 or by using the GRid generator contained in the Sound Credit desktop application.2
"What is GRid?". IFPI. IFPI. Retrieved 2020-11-27. https://www.ifpi.org/resource/grid/ ↩
"ISRC and GRid Codes for Music Receive Top Quality Tech". Sound Credit. Sound Credit. Retrieved 2020-11-27. https://blog.sound.credit/post/ISRC-and-GRid-Codes-for-Music-Receive-Top-Quality-Tech ↩