58 copies of the poster by Roskow are now available as NFTs

NFT 58 Jazzaldia

58 copies of the poster and of each of the 3 banners by Roskow are now available as NFTs

Roskow is the creator of the poster for this edition of the Jazzaldia, number 58. As well as the poster, Roskow has made another 3 illustrations for the banners that hang from the lampposts, decorating the city of San Sebastian during the days leading up to the Festival.

58 copies of the poster and each of the banners for this edition of the Jazzaldia are now available for collectors and aficionados. The 4 works can be purchased in euros, either separately or at a discount of 20% for all 4.

In view of the success enjoyed by last year’s poster in NFT format, we now offer a second opportunity to use this technology as a service for those wishing to purchase and collect this type of artistic creations, in digital format and with their corresponding certificates.

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Steps to follow

  1. Set up your digital wallet (make sure you always follow the security advice) You’ll need a wallet that’s compatible with the Polygon blockchain. If you don’t have one, you’ll have to install it (and set it up). There are lots of them, but probably the most widely and commonly used is MetaMask. Here’s a link to their website, and below you’ll find information on how to proceed. https://metamask.io https://metamask.io/faqs/ https://geekflare.com/es/finance/beginners-guide-to-metamask/
  2. Make your request via our form from 15 December 2022 at 11:30 on our website: www.jazzaldia.eus You’ll need to have set up your MetaMask wallet beforehand, as we’ll ask you for your address (public key) on the form so that we can send you the NFT. You can’t make the request if your wallet address isn’t in MetaMask, so make sure you have it before starting this step.
  3. Wait till we send you the NFT. Copies will be available until they run out.

General questions

  • What is an NFT?

    An NFT is a digital certificate of authentication associated to a unique object by means of blockchain technology. It represents objects in the digital world (but in the real world too), together with their specific characteristics, and provides proof of their authentication and ownership (now and in the past). One example could be the deed of home ownership: the deed is not the house, but without the deed you can’t prove that you own the house, or sell it.

    Anything can be digitally represented through an NFT, and blockchain technology is perfect for the job: it acts as a notary public or digital accounts ledger, where the information related to that object and its authorship and ownership are registered immutably and transparently, and which you can access to consult or interact with it whenever you need to.


    You can generate NFTs and interact with them (buy them, for example) thanks to small programs that function within the actual blockchain, called “smart contracts”. Like any contract, they can include clauses which, in this case, are transparently and automatically activated.

    For example, they can enable the original author of the asset or digital object to receive a commission (%) for every transaction (purchase or sale) of their creation carried out in the future.

    ART NFTs

    These characteristics make NFTs perfect for the art world. Thanks to NFTs you can prove the authorship and ownership of a digital artwork (an image, video, audio file, etc.), together with its characteristics. Not only does the NFT certify its authorship via blockchain, but it also records all transactions to have taken place with that asset, and will allow the artist to receive royalties for future transactions carried out by the new owners.

    NFTs have therefore become an essential tool for artists, and particularly digital artists: a technology that protects their work and also makes it easier to buy and sell.

  • Where and how can I get an NFT?

    Art NFTs can be acquired in different ways: direct transactions between the author and the buyer, in “traditional” auction houses, or in “marketplaces”, this being the most common. An NFT marketplace is an online market for buying and selling this kind of assets: a type of e-commerce where the author can create and publish the NFT of their work, where buyers can search for and buy works that interest them.

    Furthermore, in exchange for a fee, they offer a series of additional services to facilitate the process of creating NFTs in the blockchain, as well as their subsequent storage. There are numerous NFT marketplaces, with some of the best known being OpenSea, Rarible, Mintable and SuperRare, of which the first is probably the most widespread, safest and most versatile.

    The Festival poster NFT will be generated on OpenSea, although for both its creation and its publication we will have the help of BAKARTS, a recently created Basque NFT marketplace dedicated to helping artists and cultural institutions (museums, festival organisers, etc.) to create their NFTs and develop projects based on this technology.

  • How can I buy an NFT? How much will this NFT cost me?

    Given that NFTs are based on blockchain technologies, in most cases the sale is carried out in digital currencies within the marketplaces, although in some cases the procedure is different (in “normal” currency, or free). On this occasion, the NFT will be transferred absolutely free of charge (until all 57 copies are gone) and directly into the requester’s digital wallet.

    Given that NFTs are based on blockchain technologies, it is essential to use a digital wallet (which must be compatible with the Polygon blockchain), to which the ownership of the digital asset (in this case the poster NFT) can be transferred.


    Just as in the real world you don’t go shopping without your wallet (where you keep your cards and money), here you need a specific (crypto) wallet to proceed with blockchain transactions. These wallets use advanced blockchain encryption techniques to authorise and guarantee user security. The wallet can therefore securely keep, send and receive cryptocurrencies or other cryptoassets.

    Although there are several different types of cryptocurrency wallet, they can largely be divided into two major categories:

    • Hot wallets, which can take the shape of Apps or can even be set up as browser extensions. This is the case, for instance, of Coinbase and MetaMask.

    • Cold wallets, which are physical devices that function without an Internet connection. While this is generally the safest option, it is also the most expensive and is less versatile than a hot wallet (although they come in the shape of a small device that you can carry around with you). Here some of examples are Trezor and Ledger.

    Wallet operations are protected with a series of public and private keys. The public key is similar to your bank account number and personal password, your bank card PIN. We can issue a public key to anyone who sends us money (or an NFT), with no danger of anybody being able to access our funds. The private key is what ‘protects’ your assets (your cryptoassets, your NFTs, your funds) and gives you the access key to them, and you must take great care of it. The person in possession of the private key has access. It is essential that nobody knows your private key.

    If you’d like to know how to install and set up your own wallet to receive your NFT, you’ll find information below.

  • Where is my NFT kept? How can I see my NFT?

    The NFT will be stored and visible in OpenSea. To see it in OpenSea you will have to connect your wallet to its service (it will be visible to you, in your profile, but hidden from all other users, until you decide to change its status). You can also see it from PolygonScan, by introducing your wallet address.
  • What can I do with my NFT?

    NFT buyers have the right to own, sell, loan or transfer the actual NFT. In practice, this means, for example, that they can display their NFTs in a digital frame or TV, on a metaverse stage such as Decentraland, or on their social media (in your Twitter profile or, soon, in your Instagram content)… And yes, we said sell: like with any other work of art you own, if you wish, you can put it on sale. You can do it in the OpenSea marketplace itself. But if that’s what you want to do, we’ll leave you to look into it by yourself.

    And what can’t I do with the NFT? Generally speaking, unless otherwise explicitly stipulated in a contract, buyers do not have the right to make copies of the digital artwork and sell them, to transfer the copyright of the work or to create other articles based on the original (t-shirts, mugs, posters, etc.).

    In this respect, NFTs function the same way as any work of art you purchase from an artist or a gallery; buying a work doesn’t mean that you automatically acquire its copyright.

  • Other interesting links

    ¿Cómo vender tu NFT?

    How to install the MetaMask digital wallet:

    https://metamask.io https://metamask.io/faqs/ https://geekflare.com/es/finance/beginners-guide-to-metamask/

    How to find your wallet’s address (public key) on MetaMask: https://geekflare.com/es/finance/beginners-guide-to-metamask/

    How to set up the Polygon blockchain on MetaMask: https://academy.binance.com/es/articles/how-to-add-polygon-to-metamask


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