Yes, all those recitals are from the 70’s and 80’s and are freely circulating. Many of the recitals have also been released from official sources by SONY in their latest boxset:
Imho, the best Horowitz stuff is from the 30’s and 60’s. There really is no need to collect every last concert, as his rep really narrowed down after his 1965 return concert, alas.
yeah i’m less crazed about the ho bootlegs than just that living room full of stuff, I wonder how many recitals might not have seen the light of day up to this point, which are held on to by old collectors/bootleggers like that
(especially Mickey)…
Happy birthday to da LEGENDARY mickey, who’s surprizingly seem a bit undah appreshyyeytsheyyat on diz here forum.
His trills have insane speed and fury. Also alternating super even shits like in tot. Case could be made for some SFz fury too but the rest dunno
he ain’t fast enough and most people have trouble recognizing how fukin otherwordly, sculptural, intentional, intelligent (people call Pollini an intellectual pianist, but its really Mickeys dept) his interps are, and how hard it is to actually deliver them like that in performance, hard to quantify with metronome 
He iz talked about and I think part ov da reazon he iznt dizcuzzd mo iz partly due to hiz limited rep and dere bein a mo finite rezource when it cummah to dizcuzzin him
He iz fo zhor a legend, and hiz zchool ov penizm had big influence on note perfect perfz…much to da detriment ov rizk taking interpreterz
Very few pianiztz can be dat ‘zafe’ and note perfect while ztill bein excitin and colourful, and he wuz one
well said, and yes, it’s a pity about his public rep…
my teacher said he’d play a shitload of things in the house he’d never play in public tho
fatman posted this yesterday
This has better sound! TY
Diz iz da one piece ov muzik I actually find zcary to lizten to
It iz zo eerie, terrifying, and actually I feel irrationally zupahztitiouz about it
daim da comme SCRIB
Haha da zon6?
Ice cold performanze 
But with ABM it “workz”…
Totally workz, datz wut da piece iz all about to me
It’z detached from life, abzent ov all warmth, aloof, lyk a ghoztly chill ov wind above a grave. Az cliche az dat zoundz, it iz tru.
I find dat kind ov detachment actually more moving, in a chilling way, den a more involved and emotive perf.
^^^^
Yeah da Micky’s perfect in diz.
I rekall ma favs were Micky, Ginzburg and Brand.
Also Zak…
Rach all da way for me.
Friedman recorded a great last movement