The (p) notice is the internationally recognised symbol of protection. In certain countries (ie USA) it’s inclusion is a legal requirement. It should be prominently shown on all publicly distributed copies of a sound recording. It indicates the year first published. The facts in the notice will be presumed correct unless proved contrary.
Published generally means: whichever happened earlier, Rental, sale, the placing on sale or public distribution. Therefore the limited dist. Of promo only copies does not normally constitute publication.
3) P ractical way of marking recordings to give notice of the existence of copyright and it’s associated rights. And may be important for determining whether the use of a sound recording entitles the owner to remuneration.
The ISO Country Code and the Registrant Code are issued by the National Agencies or by the International ISRC Agency; the rest of the identifier is then allocated by the entity wishing to identify their sound or music video recordings.