Chairman of the International Confederation of Societies of Authors and Composers board of directors Kenth Muldin said, "Robin has been our president and the voice of CISAC for the past five years and throughout this period we have been blessed by his presence and his infectious enthusiasm.
"He took his role very seriously - we knew we could count on him whenever the principles of authors' rights were under attack.
"On behalf of CISAC, and in the name of the whole creative community that he so brilliantly represented, I would like to offer our deepest and most sincere condolences to his wife Dwina and to his family.
"We will miss him immensely; we will miss his energy, his dedication to the cause of authors and, most of all, I will miss his friendship."
Director general of CISAC Olivier Hinnewinkel added: "The global creative community and all of us at CISAC are deeply shocked and saddened by the passing of Robin Gibb.
"Robin was known all around the world as a great songwriter and artist, but he was less well known as an active defender of the rights of creators. Robin Gibb was always incredibly generous with his time as he relentlessly fought for the cause of authors and their rights."
PRS for Music also mourned the passing of the singer, with chairman of the Performing Right Society Guy Fletcher CBE adding his words on behalf of the 90,000 songwriters, composers and music publishers members.
"Few people enjoy a career in music lasting more than 50 years yet Robin Gibb was still only 62 when he passed away," said Fletcher.
"With Brothers Barry and Maurice, they formed one of the most powerful song writing teams of all time. Apart from the phenomenal success of the Bee Gees, they enriched the lives of so many international stars, delivering for them some of their most enduring hits. Islands In the Stream, Chain Reaction, How Deep is Your Love and dozens more.
"Robin was also very active in his support of Bomber Command charities and was president of CISAC, The International Confederation of Authors and Composers Societies.
"We have lost a true friend and a unique songwriter."
Musicians and industry figures from around the world have been paying their respects since the news of Gibb's death emerged last night.
Ringo Starr said, "Robin will be remembered as a musician and as a singer and part of The Bee Gees. The legacy they'll leave behind is Staying Alive, the harmonies and just the songs that they've written."
Former Bee Gee guitarist Vince Melouney said, "Robin had the most unusual voice, a great voice. All those wonderful songs like I Started A Joke and And The Sun Will Shine, they were just so beautiful. You couldn't have put another voice in there that would have done it any more justice than he did."
Others took to Twitter with messages of condolence. Justin Timberlake wrote: "We have lost a truly brilliant musician today. One of my idols. My heart goes out to the Gibb family in this time of sorrow... RIP Robin."
Bryan Adams said: "Robin Gibb RIP. Very sad to hear about yet another great singer dying too young."
Dannii Minogue added: "We start believin' now that we can be who we are - Grease is the word... RIP Robin Gibb."
And Scissor Sisters' Jake Shears said: "Robin Gibb. You are and forever will be a massive influence and inspiration. Rest in peace."
Former British prime minister Tony Blair added to the messages saying, "Robin was not only an exceptional and extraordinary musician and songwriter, he was a highly intelligent, interested and committed human being.
"He was a great friend with a wonderful open and fertile mind and a student of history and politics. I will miss him very much. My thoughts and prayers are with [his wife] Dwina and all the family."