Erling Blöndal Bengtsson
type: MusicGroup
genre: chamber music
description: Erling Blöndal Bengtsson (8 March 1932 – 6 June 2013) was a Danish cellist. Born in Copenhagen, Bengtsson gave his first public performance there in 1936, when he was four years old. He was admitted
popularity: 8
followers: 759
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0x24086699271d3183bd2d97170f279e7bda1ac5852851fca5b4bcb303c81e1c9b
additional property: OTSHash
additional property: OTSBitcoinBlock
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  value: 954667
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954667
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b6ec0690-46e8-4cf5-a052-8b664f00dca2.ots
additional property: OTSRecordURL
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  value: https://artists.proofprofile.net/proofs/artist/b6ec0690-46e8-4cf5-a052-8b664f00dca2.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b6ec0690-46e8-4cf5-a052-8b664f00dca2
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x24086699271d3183bd2d97170f279e7bda1ac5852851fca5b4bcb303c81e1c9b","name":"Erling Blöndal Bengtsson","registered_at":"2026-06-20T15:40:33Z","symbol":"NIM1643675","token_address":"0x2dc0f69ff1a43d955cacf1d6cb7d1b136b1a4b2e","type":"artist","uuid":"b6ec0690-46e8-4cf5-a052-8b664f00dca2"}
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 0x24086699271d3183bd2d97170f279e7bda1ac5852851fca5b4bcb303c81e1c9b. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6ec0690-46e8-4cf5-a052-8b664f00dca2.json and https://artists.proofprofile.net/proofs/artist/b6ec0690-46e8-4cf5-a052-8b664f00dca2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
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album: A NRK Tribute to Erling Blöndal Bengtsson
  type: MusicAlbum
  date published: 2018-04-02