It is not confirmed in any other way than being part of a set of "spoilers" from October 2016 which all came true so far. Consider it therefore most unlikely to be false.
Do you know where online could I find those "spoilers" (Can you Post a Link ?) ?
They are most likely identical to those pinned at the top of the
FreeFolk subreddit. Oh no, they're gone.
A user named Archmaester used to keep an updated version of them on the original IMDb board and I rescued it on the
GOT Board in February but that's a closed forum.
So here they are, recently updated with the actual outcome in [brackets] (I have not seen any of the episodes, so that outcome might not be fully accurate or complete):
EPISODE 1
• WWs march South towards the Wall. [True]
• Bran crosses the Wall, meets with Edd. [True]
• Sansa wants to give the lands of those who betrayed Jon to those who supported him, but Jon (in first episode) refuses to hold the children of the Karstark and Umber families responsible for the actions of their fathers. This doesn't please Lyanna Mormont (or Sansa) but Jon basically just tells her to deal with it - he doesn't plan to rule the North the way it always has been. Littlefinger, Yohn Royce, Robett Glover and Maester Wolkan also present in the scene. [True]
• Cersei, Jaime and The Mountain walk along the battlements, perhaps watching Euron's incoming fleet. Episode 1 or 7 scene (likely 1). [True, episode 1]
• Cersei forms an alliance with Euron. Episode 1 or 2 scene. She allies with Randyll Tarly as well. [True, Tarly alliance in Ep. 2, Alliance with Euron declined in Ep. 1, accepted in Ep. 3]
• At the end of Episode One, Dany and her fleet land at Dragonstone. Nobody says anything. She walks up the steps to the keep, and we follow her through the building until she reaches Stannis' old War Room. She looks out the window at the land ahead that used to belong to her family. She picks up one of the chess-like pieces on the table and looks at Tyrion, who has followed her up. She says one line: "Shall we begin?" [True]
EPISODE 2
• Tycho Nestoris comes to King's Landing and tells Cersei the debt must be paid. Exact placement unknown: happens early on. [True in Ep. 4]
• Cersei believes she is pregnant again with Jaime's child. She has Qyburn examine her. Cersei does not hesitate in telling Jaime. Likely happens within the first couple episodes. [True in Ep. 5]
• Arya uses Walder Frey's face to hold a banquet and poison his sons. Makes sure the women are dismissed first. Will happen in the first couple episodes. (Edmure also confirmed to return in season 7). [True in Ep. 1]
• Jon receives a raven from Dany; she's summoning the lords of Westeros. Jon and Davos decide to go because they need the dragonglass from Dragonstone. [True]
• Jon leaves Sansa in charge of Winterfell. [True]
• Jon leaves Ghost at Winterfell, where he stays all season. [True? Has Ghost been even seen?]
• Jorah and Sam meet in Oldtown. Sam decides to help Jorah after discovering he is Jeor Mormont's son. Placement unknown. [True in Ep. 1 and 2]
EPISODE 3
• Yara and the Dornish search for Euron but they are found by him instead. Euron destroys their fleet. He takes Yara prisoner. Theon abandons her, jumps overboard and is rescued by some Iron Born. Euron kills Obara and Nymeria, and imprisons Ellaria and Tyene. Likely an episode 3 scene. [True in Ep. 2]
• Jon and Davos arrive at Dragonstone. Tyrion meets them on the beach, and the Dothraki take their boat. [True]
• Tyrion brings them to meet Dany, encountering Missandei and Grey Worm on the way. Melisandre watches from a distance. The "throne room" contains a number of Dothraki. [True]
• Dany and Jon meet. Dany demands he bend the knee, which he refuses. Evidently, he discusses the WWs, but she doesn't believe him. Tyrion insists that Jon isn't crazy. [True]
• Davos tries to mention Jon's resurrection, but Jon dismisses it. [True]
• Dany respects Jon immediately. Jon doesn't respect Dany as much. [True]
• King Euron enters a stormy King's Landing with Yara, Ellaria and Tyene as his prisoners. They are paraded through the streets where the masses jeer at them. Euron takes them to Cersei. [True]
• Jaime and Bronn attack Highgarden and are victorious with the help of Randyll Tarly. Olenna drinks poison after the Lannister armies sack Highgarden. She admits to having killed Joffrey, and Jaime allows her to drink the poison. The Lannister flag is raised. Placement unknown. [True]
• Bran arrives at Winterfell. Meera returns home. [True. Meera leaves in Ep. 4]
• Arya encounters Nymeria on her way to Winterfell. Must happen within episodes 1-3, maybe early episode 4. [True in Ep. 2]
• Tyrion has at least one scene trying to convince Jon that Dany is the best choice for Westeros. Unclear if this is before or after the scene where Jon actually meets her. Likely episode 3, possibly episode 4. [True in Ep. 3]
• Jon and Theon meet, Jon telling Theon that if it wasn't for what he did for Sansa, he'd be dead. Likely happens episode 3, but could happen episode 4. [True in Ep. 4]
EPISODE 4
• Arya arrives at Winterfell. She reunites with Sansa and Bran. Things go well at first. [True]
• Arya and Brienne spar. [True]
• Beric, Thoros and the Hound make it to Eastwatch-by-the-Sea and are placed in the dungeons by Tormund. Placement unknown.
• Sam finds the cure for greyscale with the help of an Archmaester. Placement unknown. [True in Ep. 2 and 3]
• In King's Landing, Euron makes Ellaria watch as Tyene dies a slow death from poison. Placement unknown. [Cersei does this in Ep. 3]
• The Lannisters travel with goods taken from Highgarden back to King's Landing. The Dothraki, Unsullied and an enraged Dany ambush the Lannister army on their way back from the Reach. Jaime and Bronn are both there. Despite the Lannister army having a giant anti-dragon spear gun designed by Qyburn, they are defeated. Jaime charges at Dany and Bronn saves him from a dragon, and the two manage to escape. Likely episode 4. Jon remains at Dragonstone during this battle, as he is not aligned with her yet. [True]
• Dany torches the Westerosi lords who refuse to bend the knee, including Randyll and Dickon Tarly. Tyrion and Varys begin to worry. [True in Ep. 5]
EPISODE 5
• Arya and Sansa clash over the matter of ruling. Placement unknown. [True]
• Sam leaves Oldtown for Winterfell with Gilly and baby Sam, after learning of Rhaegar's wedding annulment thanks to Gilly. [True]
• Jorah reunites with Dany at Dragonstone. [True]
• Grey Worm and Missandei get intimate. Unknown placement. [True in Ep. 2]
• Jon isn't afraid of Rhaegal and pets him on Dany's return from the battle, which Rhaegal allows. This surprises Dany. Likely episode 4 or 5. [True]
• Tyrion persuades Dany that most of the people who would die in a direct dragon attack on King's Landing would be innocent. Placement unknown. [True in Ep. 4]
• Tyrion plans an attack on Casterly Rock through a secret sewer entrance he used to use to sneak whores into the castle. Placement unknown. [True in Ep. 2]
• Grey Worm leads the Unsullied to take Casterly Rock. Placement unknown. [True in Ep. 3]
• After Dany's attack on the Lannisters, Jon realises that what he needs to do is provide proof of the Undead Army. Likely episode 4 or 5. [True in Ep. 5]
• Jon receives a raven telling him that Bran and Arya are at Winterfell. [True]
• Jamie, Davos, Bronn and Tyrion have a secret meeting in King's Landing where Tyrion tries to persuade them to surrender to Dany, which Jaime ignores. Unclear if this happens before or after Dany ambushes the Lannister army. [True]
• Gendry's in King's Landing making weapons, and he is found by Davos. Later, Tyrion, Davos and Gendry face some Gold Cloaks. Gendry knocks them out. They leave King's Landing. [True]
EPISODE 6
• Littlefinger tries to play Arya and Sansa against each other, using the letter Sansa wrote to Robb (at the behest of Cersei and Littlefinger) to swear fealty to Joffrey. Placement unknown. [True]
• Jon, Davos, Gendry and Jorah travel to Eastwatch-by-the-Sea by boat. Davos stays behind while the others go wight hunting. [True]
• Jorah doesn't care for Jon initially, but they warm up to each other pretty quickly. Includes a scene where Jon offers Longclaw back to Jorah, who refuses it. [True]
• Jon leads a small force (himself, the Hound, Beric, Thoros, Tormund, Jorah and Gendry) to capture a wight. [True]
• The team is attacked by the Night King and thousands of wights, including a wight polar bear. The bear kills Thoros and/or Beric (apparently a slow death). [True, only Thoros dies]
• They are surrounded on an island on a frozen lake and are nearly overcome when Dany and her dragons show up. She flies most of the team back to Eastwatch, but Jon is left behind. [True]
• Jon is almost killed, but Coldhands/Benjen arrives and sends Jon off with his horse while continuing to fight the horde. Jon watches Benjen swarmed by undead as he rides, half dead, to safety. [True]
• Viserion is killed and raised as the Night King's mount. [Viserion was killed in Ep. 6]
• Jon offers to lay down his title as King in the North if Dany and her forces will help against the WWs. This scene is private. [True]
EPISODE 7
• Sansa figures out with Bran's help that she's being played by Littlefinger. Sansa sentences Littlefinger to death, which Arya carries out.
• There will be a flashback scene to Rhaegar and Lyanna's wedding. Exact placement unknown.
• Sam and Bran figure out Jon's heritage. He is apparently a legitimised Targaryen named "Aegon". Exact placement unknown.
• Theon is beat up by one of his own men. He punches him back.
• Jaime and Bronn stand watch on the battlements of King's Landing. Jaime wields Widow's Wail. Episode 1 or 7 scene.
• Meeting at the dragonpit with Jon, Dany, Cersei, Tyrion, Jaime, Qyburn, The Mountain, Bronn, Brienne, Pod, Davos, The Hound, Jorah, Varys, Missandei, Qhono, Theon and Euron. (Qyburn's little birds may be present too). Jon demonstrates the reality of the white walkers and it terrifies Cersei (apparently the Mountain chops up the wight and it keeps moving; Jon shows them the only way to kill it is with dragonglass). Cersei tells them she will send forces to help defeat the undead.
• Tyrion takes a moment to talk to Cersei alone after the Dragonpit parlay.
• Jaime and Brienne speak privately after the parlay.
• Cersei and Qyburn share a moment.
• After Jon and Dany leave King’s Landing, Cersei admits to Jaime she was lying. She wants the undead to clear out as many of her enemies as possible. Disgusted, Jaime begins to ride North. Likely happens episode 7.
• Cersei awakens in a bed soaked with blood. She miscarries.
• Snow falls on King's Landing.
• Jon and Dany have sex for the first time on a boat headed North.
• The Wall falls at the end of the episode. The Night King attacks the Wall with the reanimated Viserion. He now breathes blue flame