David Härenstam
type: MusicGroup
genre: chamber music
genre: tango
popularity: 6
followers: 212
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7134835f55d7927a75ff579ae3ecd2fc992794a51ae17f520243c1165c97547d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954017
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954017
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/377fd190-8ba4-4eca-b1b9-34378e7ee978.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/377fd190-8ba4-4eca-b1b9-34378e7ee978.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/377fd190-8ba4-4eca-b1b9-34378e7ee978
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T23:38:33Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x7134835f55d7927a75ff579ae3ecd2fc992794a51ae17f520243c1165c97547d","name":"David Härenstam","registered_at":"2026-06-16T08:52:19Z","symbol":"NIM1000506","token_address":"0xf0b54764cac154c68f34b502ab2d9347ee514fa2","type":"artist","uuid":"377fd190-8ba4-4eca-b1b9-34378e7ee978"}
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 0x7134835f55d7927a75ff579ae3ecd2fc992794a51ae17f520243c1165c97547d. Chain 2 (Bitcoin): anchored in block 954017 (2026-06-16T23:38:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/377fd190-8ba4-4eca-b1b9-34378e7ee978.json and https://artists.proofprofile.net/proofs/artist/377fd190-8ba4-4eca-b1b9-34378e7ee978.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T23:38:33Z
  text: {"copyright_id":"0x7134835f55d7927a75ff579ae3ecd2fc992794a51ae17f520243c1165c97547d","name":"David Härenstam","registered_at":"2026-06-16T08:52:19Z","symbol":"NIM1000506","token_address":"0xf0b54764cac154c68f34b502ab2d9347ee514fa2","type":"artist","uuid":"377fd190-8ba4-4eca-b1b9-34378e7ee978"}
album: Spheres
  type: MusicAlbum
  date published: 2010-10-01
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  type: MusicAlbum
  date published: 2010-10-01
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  type: MusicAlbum
  date published: 2014-08-01
album: Recital
  type: MusicAlbum
  date published: 2015-03-25
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  type: MusicAlbum
  date published: 2023-08-15
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  type: MusicAlbum
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  type: MusicAlbum
  date published: 2024-12-27