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Mauricio Gomez, more commonly known as 'La Liendra', shared a video with his 5.4 million Instagram followers on 15 February, demonstrating how the code apparently worked.
In the clip, the influencer poses for the camera by showing off some of his existing tattoos, before going on to reveal the QR code on the back of his neck.
The person filming, who is believed to be his girlfriend, then uses their phone camera to 'scan' the code, before a message pops up to open La Liendra's Instagram page.
Many of his followers were stunned by the stunt, with many saying the tattoo made them feel uneasy.
One commented: "I don't like it, he looks weird."
Someone else said: "I thought it was a menu what he had back there."
A third added: "This dude is crazy."
However, if the QR code did ever truly work, it would appear it no longer does.
La Liendra reportedly told local plastic surgeon and friend Carlos Ramos, who lives in the Colombian city of Medellin, that it wasn't working, after he turned up to borrow his Porsche sports car for social media content.
In a video, the doctor showed the Instagram star that his tattoo had 'turned out fake because it does not open [social media]'.
It is unclear if the tattoo ever worked as a genuine QR code or whether it has only since stopped working - possibly due to a reason like the skin had changed in some way, or the pigment had faded.
Over in the UK, another bloke recently got an equally unusual tat, having had the 'worst picture' of himself inked across his back.
Charlie White, a 25-year-old warehouse worker from Ludlow in Shropshire, told LADbible: "I just got drunk one weekend with my mates - I tend to do dares when I've had a drink.
"Someone dared me to get a tattoo of myself on my back, like Steve-O from Jackass, so I messaged my tattooist and I went ahead with it.
"It's the worst picture I have of myself, I thought, 'well, if I'm going to do it, I may as well do it right'.
"It did cross my mind to change the photo to a nicer one, but I'd already said I was going to use this one, so I thought I'd better stick to it."
Charlie said the tattoo took more than three hours to complete and cost £500 - but in fairness to the tattooist artist, they've done a decent job.
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