I should study more in depth and open some ticket but I writing this problem down here, otherwise I’ll forget (I already forgot this once or twice recently, now another time I come across it, I don’t want to have to remember it myself):
SACEM used to have a short integer ID for works.
Now they use something that looks like our Disc ID and work permalinks no longer work, we have to use work search URL instead (cf. second edit, lower).
I must verify that they are actually work ID and not search session ID or seomthing bogus like that.
On one hand, SACEM repertoire website used to expose ISWC only, although an integer was used in URLs, as shown in this archived example of SACEM work page with old-fashion URL.
On the other side, SACEM is known to identify works with integer IDs called COCV (Code Œuvre, Code Version literally Work Code, Version Code). Looking at COCV examples, it might be the same integer used in old SACEM repertoire URLs, although it still has to be confirmed/disconfirmed with a complete example. (There is nothing about Works by Pierre-Yves Plat in MBDB.)
However, that site seems to be pretty broken. I have to clear cookies or use a new incognito window for each search, otherwise I get an error.
To find the COCV based on the title and artist, use this search page, find the work you want, click “Version imprimable” in the bottom left of the popup, and the COCV will be in the address bar.
Very fortunately, their SACEM WORK CODE is still visible in HTML source code as first and only result of Résultats de recherche - La Sacem (the only linkable stuff), shows:
‘sacem work code’:‘7300202211’,‘iswc’:‘T-900.011.418.1’,…
It’s more a problem with iswcnet itself, how it manages how people enter their site with either referrer (previous page) not being outside their site, session cookies, etc.
So on mobile we have to copy the URL and if we paste it in the address bar, it works. On PC, once logged in, it works with the link
But thanks very very much for the Buster extension, I installed it on Firefox for Android (v68), and on my PC (Firefox and Vivaldi). It’s such a relief, this extension!!!