Barnlåtar och Barnvisor
type: MusicGroup
genre: swedish ballads
popularity: 35
followers: 1208
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8401d7aa7641b67fd6d8d2141019f417e9a91c3c1169bba7fb96c7cf54aae4be
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5ec83da0-327d-4955-a53f-b2a5c19a9efd.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5ec83da0-327d-4955-a53f-b2a5c19a9efd.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5ec83da0-327d-4955-a53f-b2a5c19a9efd
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x8401d7aa7641b67fd6d8d2141019f417e9a91c3c1169bba7fb96c7cf54aae4be","name":"Barnlåtar och Barnvisor","registered_at":"2026-06-11T22:30:08Z","symbol":"NIM0123585","token_address":"0x4b261a00f6b93ee5f6b8e276fdc6fb020032ecfe","type":"artist","uuid":"5ec83da0-327d-4955-a53f-b2a5c19a9efd"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8401d7aa7641b67fd6d8d2141019f417e9a91c3c1169bba7fb96c7cf54aae4be. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ec83da0-327d-4955-a53f-b2a5c19a9efd.json and https://artists.proofprofile.net/proofs/artist/5ec83da0-327d-4955-a53f-b2a5c19a9efd.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x8401d7aa7641b67fd6d8d2141019f417e9a91c3c1169bba7fb96c7cf54aae4be","name":"Barnlåtar och Barnvisor","registered_at":"2026-06-11T22:30:08Z","symbol":"NIM0123585","token_address":"0x4b261a00f6b93ee5f6b8e276fdc6fb020032ecfe","type":"artist","uuid":"5ec83da0-327d-4955-a53f-b2a5c19a9efd"}
album: Barnlåtar och Barnvisor
  type: MusicAlbum
  date published: 2015-12-27