Jóhann Friðgeir Valdimarsson
type: MusicGroup
popularity: 3
followers: 159
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdbd3c72705dc13cd0391c79fbf7b0f1e4375e1d368042f3f6193b2ba79467355
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954131
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954131
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7b8c77cd-4cdd-4316-ac0a-cb8573ad5305.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7b8c77cd-4cdd-4316-ac0a-cb8573ad5305.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7b8c77cd-4cdd-4316-ac0a-cb8573ad5305
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T19:19:19Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xdbd3c72705dc13cd0391c79fbf7b0f1e4375e1d368042f3f6193b2ba79467355","name":"Jóhann Friðgeir Valdimarsson","registered_at":"2026-06-17T08:40:02Z","symbol":"NIM1341108","token_address":"0x2377482149af55392376d810f805d99672f6cc38","type":"artist","uuid":"7b8c77cd-4cdd-4316-ac0a-cb8573ad5305"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd3c72705dc13cd0391c79fbf7b0f1e4375e1d368042f3f6193b2ba79467355. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b8c77cd-4cdd-4316-ac0a-cb8573ad5305.json and https://artists.proofprofile.net/proofs/artist/7b8c77cd-4cdd-4316-ac0a-cb8573ad5305.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T19:19:19Z
  text: {"copyright_id":"0xdbd3c72705dc13cd0391c79fbf7b0f1e4375e1d368042f3f6193b2ba79467355","name":"Jóhann Friðgeir Valdimarsson","registered_at":"2026-06-17T08:40:02Z","symbol":"NIM1341108","token_address":"0x2377482149af55392376d810f805d99672f6cc38","type":"artist","uuid":"7b8c77cd-4cdd-4316-ac0a-cb8573ad5305"}
album: Lýs, milda stjarna
  type: MusicAlbum
  date published: 2002-01-01
album: Lýs, milda stjarna (Live)
  type: MusicAlbum
  date published: 2002-01-01
album: Jóhann Friðgeir & vinir
  type: MusicAlbum
  date published: 2006-01-01
album: Jóhann Friðgeir & vinir
  type: MusicAlbum
  date published: 2006-01-01
album: Sacred Arias
  type: MusicAlbum
  date published: 2010-01-01