Denarium physical bitcoins

Denarium Physical Bitcoin

Redeemed Denarium coin

Denarium physical bitcoins, also called Denarium bitcoin coins, are physical bitcoin coin wallets created by a Finnish Bitcoin company Prasos (Prasos Ltd, Jyväskylä, Finland) that contain an embedded piece of paper with digital Bitcoin value, covered by a tamper-resistant hologram. Denarium bitcoin wallets are available in different BTC increments. They can be purchased at Denarium's website, https://www.denarium.com (multiple payment methods accepted: Bitcoin, Visa, Mastercard, IBAN/SEPA bank transfer).

The bitcoin wallet is designed such that they could be circulated in face-to-face transactions. The first person to redeem its private key gets the value on the coin, and afterward, the coin no longer has any Bitcoin value. It is difficult or impossible to read the private key on the coin without damaging or destroying the hologram, which exposes a honeycomb-like tamper-evidence pattern when peeled.

The piece of durable paper inside each coin has a private key which forms the backing for the Bitcoin value represented by the coin. The private key is in 30-character mini private key format. Redeeming the private key back into digital Bitcoins is currently available with a patched reference client as well as with many alternative clients such as Mycelium.

Denarium bitcoin coins are similar to Bitbills and Casascius physical bitcoins in that they are an object that contains a redemption code that serves as a bearer item for digital bitcoins.

Releases of Denarium bitcoin wallet coins

Original series 1/10 BTC Coin wallet

First series 1/10 BTC Denarium coin

• 2.86 cm / 1.126 inches in diameter
• Solid brass
• Approximately 7.65 g / 0.269 ounces
• Mintyear: 2015
• Denomination: 1/10 BTC
• Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper
• First appeared in June 2015 .
• Private key: both 30 character string inside the coin and a QR-code, the 256-bit private key is SHA256(string)
• All 4,000 Bitcoin addresses pre-generated for the series have been published on GitHub as automatically updating Bitcoin-signed list

Original series 1/100 BTC Coin wallet

First series 1/100 BTC Denarium coin

• 2,86 cm / 1.126 inches in diameter
• Solid brass
• Approximately 7,65 g / 0.269 ounces
• Mintyear: 2015
• Denomination:1/100 BTC
• Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper
• First appeared in June 2015 .
• Private key: both 30 character string inside the coin and a QR-code, the 256-bit private key is SHA256(string)

Denarium Custom Coin wallet

Denarium Custom

• 2,86 cm / 1.126 inches in diameter
• Solid brass
• Approximately 7,65 g / 0.269 ounces
• Mintyear: 2015
• No denomination on the coin
• Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper
• Private key: both 30 character string inside the coin and a QR-code, the 256-bit private key is SHA256(string)

Denarium 1 BTC

1 BTC silver

• 4,06 cm / 1.598 inches inches in diameter
• .999 Fine Silver
• Approximately 31,10 g / 1.097 ounces (1 Troy ounce)
• Mintyear: 2016
• Denomination: 1 BTC
• The production volume: limited to 250 pcs
• Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper
• Private key: both 30 character string inside the coin and a QR-code, the 256-bit private key is SHA256(string)

Denarium 1 BTC Silver Patinated

1 BTC silver patinated

• 4,06 cm / 1.598 inches inches in diameter
• .999 Fine Silver with patinated finish
• Approximately 31,10 g / 1.097 ounces (1 Troy ounce)
• Mintyear: 2016
• Denomination: 1 BTC
• The production volume: limited to 100 pcs
• Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper
• Private key: both 30 character string inside the coin and a QR-code, the 256-bit private key is SHA256(string)

Denarium 1 BTC Silver Golden Edition

1 BTC Silver Golden Edition

• 4,06 cm / 1.598 inches in diameter
• .999 Fine Silver (99,9% silver) with gold finish
• Approximately 31,10 g / 1.097 ounces (1 Troy ounce)
• Mintyear: 2016
• Denomination: 1 BTC
• The production volume: 90 coins
• Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper
• Private key: both 30 character string inside the coin and a QR-code, the 256-bit private key is SHA256(string)

Denarium 1/10 BTC Gold Plated

Denarium 1-10 BTC Gold Plated

• 2,86 cm / 1.126 inches inches in diameter
• 1,6 mm / 0,063 inches thick
• Gold Plated (3 µm) Brass
• Approximately 7,65 g / 0.27 ounces
• Mintyear: 2015
• Denomination: 1/10 BTC
• Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper
• Private key: both 30 character string inside the coin and a QR-code, the 256-bit private key is SHA256(string)

Denarium 1/100 BTC Gold Plated

1-100 Gold Plated

• 2,86 cm / 1.126 inches in diameter
• 1,6 mm / 0,063 inches thick
• Gold Plated (3 µm) Brass
• Approximately 7,65 g / 0.27 ounces
• Mintyear: 2015
• Denomination: 1/100 BTC
• Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper
• Private key: both 30 character string inside the coin and a QR-code, the 256-bit private key is SHA256(string)

Denarium Custom 0-2 BTC Gold Plated

Denarium Custom 0-2 Gold Plated

• 2,86 cm / 1.126 inches in diameter
• 1,6 mm / 0,063 inches thick
• Gold Plated (3 µm) Brass
• Approximately 7,65 g / 0.27 ounces
• Mintyear: 2015, 2016 and 2017, 2018 (All coins have the year 2015 minted)
• No Denomination
• Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper
• Private key: both 30 character string inside the coin and a QR-code, the 256-bit private key is SHA256(string)

Denarium 1 BTC Gold

Denarium 1 BTC Gold

• 30 mm / 1.181 inches in diameter
• 1 Troy ounce (31,10 g / 1.097 ounces)
• .999 Fine Gold (99,9% gold)
• Mintyear: 2017
• Denomination: 1 BTC
• The production volume: Batch #1: 23 units, Batch #2: 48 units, Batch #3: 65 units
• Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper
• Private key: both 30 character string inside the coin and a QR-code, the 256-bit private key is SHA256(string)

Denarium 1/2 BTC Gold

Denarium 1-2 BTC Gold

• 29 mm / 1.142 inches in diameter
• 1/2 Troy ounce (15,55 g / 0.549 ounces)
• .999 Fine Gold (99,9% gold)
• Mintyear: 2017
• Denomination: 1/2 BTC
• The production volume: Batch #1: 49 units
• Packed in a square Quadrum coin capsule with Intercept technology.
• Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper
• Private key: both 30 character string inside the coin and a QR-code, the 256-bit private key is SHA256(string)

Denarium Custom Silver

Denarium Custom Silver

• 3,90 cm / 1.535 inches in diameter
• 1,6 mm / 0,063 inches thick
• .999 Fine Silver (99,9% silver)
• 1 Troy ounce (31,10 g / 1.097 ounces)
• Proof quality
• Mintyear: 2017
• No denomination
• The production volume: Batch: #1 499 coins, Batch # 2 Uncertain.
• EAN / GTIN-13: 6430070871127
• Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper
• Private key: both 30 character string inside the coin and a QR-code, the 256-bit private key is SHA256(string)

Denarium Patinated Bronze

Denarium Patinated Bronze

• 4,06 cm / 1.598 inches inches in diameter
• Bronze with a patina finish
• Approximately 31,92 g / 1.126 ounces
• Mintyear: 2017
• Denomination: 1 BTC
• The production volume: 500 coins
• Eight-digit "firstbits" visible through a small transparent window that allows limited visibility of one side of the private key paper
• Private key: both 30 character string inside the coin and a QR-code, the 256-bit private key is SHA256(string)

See also

• Mini private key format