Denarium physical bitcoins: Difference between revisions
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* First appeared in June 2015 <ref>[https://bitcointalk.org/index.php?topic=1021159.40 [DENARIUM] Next Generation Physical Bitcoins (IN STOCK)]</ref>. | * First appeared in June 2015 <ref>[https://bitcointalk.org/index.php?topic=1021159.40 [DENARIUM] Next Generation Physical Bitcoins (IN STOCK)]</ref>. | ||
* Private key: both 30 character string inside the coin and a QR-code, the 256-bit private key is SHA256(string) | * Private key: both 30 character string inside the coin and a QR-code, the 256-bit private key is SHA256(string) | ||
===Denarium Custom=== | ===Denarium Custom=== | ||
Revision as of 13:12, 24 May 2018
Denarium physical bitcoins, also called Denarium coins, are physical metal coins 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 coins 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 coins are 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 afterwards, 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. 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 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 coins
Original series 1/10 BTC 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 [1].
- 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
- 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 [2].
- Private key: both 30 character string inside the coin and a QR-code, the 256-bit private key is SHA256(string)
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
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- 30 mm / 1.181 inches in diameter
- 1 Troy ounce (31,10 g / 1.097 ounces)
- .999 Fine Gold (99,9% gold)
- Mintyear: 2016
- Denomination: 1 BTC
- Approximately 31,10 g / 1.097 ounces (1 Troy ounce)
- The production volume: limited to 65 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 1/2 BTC Gold
- 29 mm / 1.142 inches in diameter
- 1/2 Troy ounce (15,155 g / 0.549 ounces)
- .999 Fine Gold (99,9% gold)
- Mintyear: 2016
- Denomination: 1/2 BTC
- Approximately 31,10 g / 1.097 ounces (1 Troy ounce)
- The production volume: limited to 49 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 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
- 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)