On view at @BTC Prague 🔥 OG Bitcoin Miner Bit Hasher 0001 by House of Ralfus Description: The original ledger device.

An antique wooden abacus mounted on an original French antique oval solid wood plinth, finished with a solid brass plaque engraved using traditional techniques: "OG Bitcoin Miner / Bit Hasher 0001 / House of Ralfus."

Before ASICs, before GPUs, before CPUs - there was the abacus. The oldest computing device known to humanity, the original tool for counting. Modern Bitcoin miners run trillions of hash operations per second. But strip away the silicon and the cooling and the megawatts: every hash is, at its core, counting.

This sculpture honours the work at its most ancient form. The first miner. The genesis hasher. The original ledger device.

A wink and a thesis at once.

From The Bitcoin Lexicon by House of Ralfus - an ongoing collection of one-of-one works building the visual vocabulary of Bitcoin. The first complete public showing takes place at a dedicated launch later in 2026. Collection enquiries: studio@houseofralfus.com. Antique wooden abacus on original French antique oval solid wood plinth, solid brass plaque engraved using traditional techniques ("OG Bitcoin Miner / Bit Hasher 0001 / House of Ralfus"). The OG Bitcoin Miner. 54.5 x 38 x 17.3 cm (H x W x D, abacus on plinth)

On auction @BTC Prague June 11-13 ⚡️ "0388/CORN (print)" by @ZETRA Fine Art Print, Hahnemühle Photo Rag Bright White, unframed 42 x 59,4cm "CORN is word #0388 of the BIP-39 mnemonic seed phrase wordlist. It is one of 2048 words currently reshaping our world. For many, these words were the starting point of the journey to becoming a true Bitcoiner—a path defined by freedom, sovereignty, and peace of mind. This piece forms part of THE BIP39 SERIES by ZETRA, in which the artist visualises the intersection of these words, and their corresponding numbers, through striking graphics, sculpture, and other forms of expression. See the numbers. See the words."

Timechain Artifacts

0388/CORN (print) by ZETRA

On auction at the @BTC Prague Gallery curated by @FractalEncrypt ⚡️ - June 11-13 "Omega" by Bitchair @Bitchair Six kind of woods, cotton upholstery fabrics 80x65x80 cm "Original handcrafted chair for BTCPrague 2026"

Timechain Artifacts

Omega by Bitchair

On auction at the @BTC Prague Gallery curated by @FractalEncrypt ⚡️ - June 11-13 "HANDS OF BITCOIN - 92164" by @xxxBTCxxx 13%’er Mixed materials on canvas, wood framed 60cm x 92cm x 5cm "Hands of Bitcoin is a mixed media work that explores the human gesture as an interface between the physical world and the decentralized digital realm. The hands emerge as symbolic agents of interaction, validation, and creation within the Bitcoin network. The presence of Satoshi Nakamoto is evoked through the anonymity of the gesture, reflecting cypherpunk principles of privacy, sovereignty, and decentralized authorship. The hands suggest action without identity and participation without central authority. Geometric structures and energetic flows traverse the composition, indicating the transmission of value and information across the Bitcoin Timechain. The work reflects the role of individual nodes in sustaining a system governed by cryptography and consensus. Bitcoin is presented as a technological discovery, grounded in mathematics and geometry—a structural phenomenon expressing decentralization aligned with the fundamental laws of the universe."

In @Flo Montoya's words: “The making involved choices at every step: how to hide wiring through a hollow torso without compromising its silhouette, how to sink a passage of the whitepaper into a base that still breathes, how to make a light respond only to authentic Proof of Work. Months of prototypes, failed molds, firmware fixes, and long nights of calibration made this possible. The piece you see is the result of that labour. Now, collectors have the rare opportunity to claim piece 1 of 21 through the auction at BTC Prague — 1/21.”

Timechain Artifacts

El Regalo by Rebel Money and Flo Montoya

On auction at @BTC Prague June 11-13⚡️ "The Validating Totem" by @AdamKadmon Wood, 23 carat gold 99/40/3 cm "“The Validating Totem” is a artwork I created after a two-year pause. The project is ambitious. That’s why I had to approach it responsibly and consistently, without making hasty decisions that might have affected the direction of the entire work. Throughout the process, I tested the limits of both the laser cutter and myself, many of the details are barely 2mm thick. After two months - most of which I spent in front of the computer working on the program - the end result was worth the effort. I want to believe that I contributed to this incredible community of free spirits, fueling the idea that is Bitcoin. The emotions are many and varied, but one stands out above the rest - Gratitude. This work is dedicated to each and every one of you who weathered the bear market with the absolute faith that everything would be alright. Be blessed, and don’t let politics crush your free spirit. Bitcoin is an idea that brings hope in this mad mad world..."

On auction at @BTC Prague June 11-13⚡️ "Mnemonic Geometry" by @Modeotec PCB (printed circuit board), 22K Gold, blacked Fiberglass Core. Lamp: 230V, EU-Plug Solid stand. 35cm x 50cm "2048 words - BIP-39 - unfolds in a spiral, as if language itself were tightening into a singular idea. At the center rests a geometric figure, a quiet core of order. Throughout, the number 12 appears again and again, a cosmic reminder that freedom, security, and identity are built upon repeating patterns. With a backlight, the truth shines through the board, and you see it the moment you switch on the light, just as you reveal it when you activate the Bitcoin protocol." https://timechainartifacts.com/12-BTCP26

On auction at @BTC Prague June 11-13⚡️ "AWAKEN.02" by @Mx12art Gallery Bond with a floating frame Professional gallery quality Size: 60x60cm "“She is Orange Pilled” This is more than art, it’s a force for freedom, already powerful today and destined to shape the future. The third artwork is on the horizon, and with it, I plan to weave in the idea of Nostr, connecting decentralisation, communication, and liberation. Together, these pieces form a movement, unstoppable and radiant."

On auction at the @BTC Prague Gallery curated by @FractalEncrypt June 11-13⚡️ "The Great Tree" by @The Great Print Ballpoint pen and gouache paint on watercolor paper 60cm x 3cm x 80cm "“The Great Tree” - From a seed of truth grows the great tree of freedom. Nature is inherently permissionless, much like Bitcoin."

“⚡️I’m proud to exhibit "A Piece of Time" in the BTC Prague Art Gallery curated by @FractalEncrypt . Choose your meaningful moment in Bitcoin’s Timechain and preserve it forever.” @Studio Zeitwerk Wood, concrete, melted fiat coins and 24k gold. 7 × 7 × 19 cm "Each material carries symbolic meaning. Concrete represents the foundation upon which Bitcoin was built. Melted fiat coins reference the transformation of legacy monetary systems into something new. Gold reflects scarcity, value and humanity's long history of sound money. Wood introduces warmth, growth and the organic nature of living systems — a reminder that Bitcoin, while rooted in mathematics and code, continues to grow naturally through the voluntary actions of millions of individuals around the world." ""A Piece of Time" transforms a specific moment in Bitcoin's history into a physical artifact. Each sculpture is built around a Bitcoin block personally selected by its owner. The chosen block height is engraved into the work and becomes a permanent anchor to a unique moment in the Timechain — whether it marks a first bitcoin purchase, the birth of a child, a life-changing event, or any other meaningful moment forever recorded in Bitcoin's history. The piece combines wood, concrete, melted fiat coins and 24k gold. Together, these materials symbolize Bitcoin's emergence from the legacy monetary system and its transformation into a new form of value built on transparency, scarcity and time. Rather than representing Bitcoin as technology, "A Piece of Time" explores Bitcoin as memory, history and time itself — made tangible." Check out the auction here: https://timechainartifacts.com/12-BTCP26

On auction at @BTC Prague June 11-13 ⚡️ "Unknown Bitcoin" by @₿𝗶𝘁𝗰𝗼𝗶𝗻 𝗔𝗿𝘁𝗶𝘀𝘁 Threads DMC "New Colors" Embroidery Floss Pack, DMC Gold Embroidery Hand Needles, Fabric, Handmade decorative frame. 40x30x2 cm "Painting-Embroidery «Unknown Bitcoin» Date: 2023 “UNKNOWN BITCOIN” is a visionary embroidery that captures the spirit of innovation, resilience, and freedom. Bitcoin shines as a guiding light in uncharted territory  a beacon for those daring to defy the old world and step into the new Style: Craftivism (textile art using needle and thread to show ideas like decentralization, financial freedom, and digital rights) Rarity: Unique (One-of-a-kind piece) Medium: Textile Art Embroidery (handmade cross-stitch embroidery) Frame: Included Signature: Hand-signed by artist" https://timechainartifacts.com/12-BTCP26

On auction at @BTC Prague June 11-13 ⚡️ "SEEDPHRASE Vessel" by @dimitria (Art As A Consequence) Glazed ceramic ~ 30 cm "Never share your seed phrase—not with your bank, not with an exchange, and not with a helpful DM. In this ceramic vessel, Dimitria Barrows reworks a scene from The Simpsons, replacing Springfield Elementary with "Blockchain Elementary School" and altering the billboard to read: "Send me your seedphrase." Rendered in ceramic, the image gains a sense of permanence, contrasting with the speed and disposability of digital fraud."

On auction at @BTC Prague June 11-13 ⚡️ "The Whole Entire Universe (graphic version) sides 4-6" by @Anik Malcolm Graphite on Italian Fabriano Accademia paper 128x128cm "‘The Whole Entire Universe (graphic version)’ – The first ever depiction of 21 million, and one of the most literal Bitcoin artworks that can be made. The first iteration of a larger series that includes the oil painting version recently shown at B26, digital prints, forthcoming sculptures, a planned large public installation in Roatán, and other media. This is the first iteration, meticulously hand-drawn over hundreds of hours, and first exhibited at Plan B Lugano in October 2025. Anik wanted to make an artwork showing ’21 million of something’, and his wife, herself an artist and jeweller, suggested a cube of beads, as they were one of the first forms of currency to be used. 21 million was clearly not a number that would fit neatly into a cube, so Anik looked for a way by which they could. He found that a cube of 276x276x276 would give a number of 21,024,576 – 24,576 too many. However, this excess number coincidentally divided exactly by 6, allowing him to remove 4096 beads from each of the cube’s six sides to achieve the exact 21,000,000. The number 4096 seemed familiar. Ideally, as this was a cube, each area of removed beads would be a square for aesthetic elegance, so he checked to see whether by any chance 4096 had a square root. Not only did it have a square root, but that square root was 64 – a power of 2, meaning he could allow those ‘removed square areas’ to simultaneously halve in size while exponentially growing in number. To him, this conveyed an incredible hidden mathematical elegance within the number 21,000,000 and the cube image which is so ubiquitous to Bitcoin, visually portraying not only the halving process, but also the exponential growth which the halving mechanism enables. Anik is not a mathematical philosopher, but he hopes that someone who is can extract the meaning that seems so clearly implied."

On auction at the @BTC Prague Gallery curated by @FractalEncrypt ⚡️ - June 11-13 "The Timelocker" by @X3N0533D ⚡️ Watercolor and ink on Arches paper 300gr. Original size: 33 x 33 cm. Exhibition size (with frame): 51 x 51 x 3 cm. ""The Timelocker". 2026 (block 944934). Original size: 33 x 33 cm. In a futuristic universe, a seemingly powerful humanoid stands in quiet contemplation before a gigantic, gate-like round device — a mysterious mechanism designed to safeguard and preserve value in cyberspace. With its imposing circular form and intricate biomechanical details, the device radiates both technological majesty and enigmatic purpose, symbolizing the eternal guardianship of sovereign wealth in a decentralized digital realm."

On auction at @BTC Prague June 11-13 ⚡️ "Bitcoin Fixes This Bulla (#1/8) - Sound Money" by @Yonat Vaks Ceramic stoneware sculpture with tailor made iron stand Ceramic sculpture - 16x16x16 cm, iron stand - 10x10x10cm10x10x10 cm "'Bitcoin Fixes This' is a series of eight ceramic sculptures, modern replicas of the very first ledgers ever invented. Each one represents one of the main problems in the FIAT system that Bitcoin solves. This bulla (#1/8), engraved with the phrase - 'Sound Money' - explains the fact that Bitcoin has a hard cap of 21 million. FIAT money can be created instantly in unlimited amounts and that breaks the fundamental property of good money: scarcity. As a consequence, your purchasing power declines over time, saving is punished and speculation is seemingly rewarded. This isn't a bug in the FIAT system, it's a feature, and it has tremendous consequences on society. This series bridges over 5000 years of the concept of money. Around 3300 BC, in ancient Mesopotamia, the first ledgers were invented. They were sealed clay envelopes, called bullae, that held tokens representing contracts between parties. When the first transactional contracts were invented, it was understood that they needed to be trustless. These ledgers eventually led to accounting and the invention of written language. Each piece is a ceramic ball that holds ceramic orange pills inside - each a unique modern interpretation of these ledgers. Ancient bullae were sealed with the contract minted on the outside. My modern interpretation is adorned with engravings representing the monetary problem Bitcoin fixes in a memetic, humorous way. The Genesis block is minted on the outside, as well as an engraving of a snake, holding an orange pill. This is a nod to the story of The Garden of Eden in the Book of Genesis. The snake in this story is a symbol of temptation, knowledge, and, ultimately, disobedience. He tempts Eve to eat from the Tree of Knowledge of Good and Evil. The snake in this interpretation hands the viewer an orange pill, a new fruit from the tree of knowledge. It's your choice to learn the truth. This time, eating the forbidden truth brings you back to paradise. Unlike ancient bullae, this modern one has holes in the form of merkle trees, through which you can see the tokens inside, as is appropriate for a transparent ledger like Bitcoin. The tokens can't be tampered with, but can be seen. The piece comes with a handmade iron stand that has been left to oxidize, bringing out a natural orange color."

On auction @BTC Prague June 11-13 ⚡️ "0388/CORN (print)" by @ZETRA Fine Art Print, Hahnemühle Photo Rag Bright White, unframed 42 x 59,4cm "CORN is word #0388 of the BIP-39 mnemonic seed phrase wordlist. It is one of 2048 words currently reshaping our world. For many, these words were the starting point of the journey to becoming a true Bitcoiner—a path defined by freedom, sovereignty, and peace of mind. This piece forms part of THE BIP39 SERIES by ZETRA, in which the artist visualises the intersection of these words, and their corresponding numbers, through striking graphics, sculpture, and other forms of expression. See the numbers. See the words."

On auction at @BTC Prague June 11-13 ⚡️ "Bitcoin White Paper 2026 — 5 Minutes to Midnight" by @Cypherpunk Now Hand-pulled 13-color screenprint using custom-mixed inks on premium matte fine art paper. 100 × 70 cm (39.4 × 27.6 in) "We find ourselves moments before impact. A burning Bitcoin meteor cuts through the sky, while the bankstersaur counts what he believes still holds value. But his watch reads five minutes to midnight. Time is nearly up. Set within a lush, overgrown environment, the scene contrasts apparent prosperity with inevitability. The system still appears alive yet its trajectory has already been set. The Bitcoin meteor cannot be stopped. A precisely hand-pulled, 13-color screenprint, the work merges classical engraving aesthetics with contemporary digital language. Capturing not an explosion, but the quiet certainty that one era is ending, and another is about to begin." https://timechainartifacts.com/12-BTCP26

On auction at @BTC Prague June 11-13 ⚡️ "A Handwritten Bitcoin Portrait - Black & Gold" by @Schatoshi ⚡ Maple wood, laser engraved 594mm x 841mm x 30mm, 7KG "This artwork is based entirely on the Bitcoin Whitepaper, written out by hand, word for word, using a 0.15 mm pen in the original artwork. From close range, the viewer can read the text like a book. From a distance, the dense micro-calligraphy resolves into the instantly recognizable Bitcoin logo. The original piece was meticulously handwritten at DIN A3 scale by the nearly 70-year-old artist, whose distinctive calligraphic technique has been refined over almost four decades. Every line, word, and spacing decision contributes simultaneously to legibility and to the formation of the larger image — uniting textual meaning with visual structure. For this exhibition, the work has been transformed into a monumental physical interpretation at DIN A1 scale (594 × 841 mm). The artwork is laser-engraved into maple wood, finished in a striking black and gold aesthetic, and presented in a matching black-and-gold frame. The contrast between the deep black surface and the golden engraving gives the piece a sculptural presence — both minimal and luxurious. This edition is strictly limited to 21 works worldwide. The present piece, 2/21, was produced at Bitcoin block height 940000, anchoring it to a specific moment within Bitcoin’s immutable ledger. A custom plaque, gold-plated in 750 yellow gold, is mounted beneath the artwork, bearing both the edition number and block time — a physical counterpart to Bitcoin’s concept of verifiable scarcity." https://timechainartifacts.com/12-BTCP26

On auction at @BTC Prague June 11-13 ⚡️ "Dressed In Entropy" by @Lady Block Jane Acrylic on canvas, finished with protective varnish 120 x 60 x 2,5 cm "When I walk absentmindedly through the forest and, upon each random encounter with a tree, unconsciously pass left or right - is that an expression of free will,  emergent randomness,  or merely deterministic noise ? And if these microdecisions could be recorded as a sequence of bits ( left =0, right=1 ), could they perhaps lead me to a place accessible only through true entropy: the origin of a private key that no universe can ever guess ? This artwork is proof of work in physical form. Unique. No copies. No prints, No NFTs"

On auction at @BTC Prague June 11-13 ⚡️ "The Achaeans -2\21" by @antonio batzu Ceramic, copper luster, pure gold, resin, alluminium, iron. 56 cm x 55 cm x 30 cm "Sea People is a project structured around 21 sculptures. They embody the spirit of navigators throughout history. Explorers, traders, evangelists, conquerors. They faced the unknown with ardent hearts and eyes on the horizon, putting their lives on the line. This particular sculpture (number 2 in a series of 21) depicts an Achaean ship loaded with warriors. As Homer says: "And the Achaeans, gathered together, hauled their ships toward the divine sea, laden with provisions and weapons for the war against the Trojans." https://timechainartifacts.com/12-BTCP26