Offerdals Spelmanslag
type: MusicGroup
genre: folk
genre: polka
genre: swedish ballads
popularity: 3
followers: 64
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd131de0fc1e1512bc265c543da7aad542d957b5b94e75eb8dd5905926775bb5f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  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/c199864f-a2e1-4712-8220-12c03d9c7dbf.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c199864f-a2e1-4712-8220-12c03d9c7dbf.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c199864f-a2e1-4712-8220-12c03d9c7dbf
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T07:29:20Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd131de0fc1e1512bc265c543da7aad542d957b5b94e75eb8dd5905926775bb5f","name":"Offerdals Spelmanslag","registered_at":"2026-06-20T19:52:59Z","symbol":"NIM1697771","token_address":"0xf2b9baeb7571a00283f6dee9c5d004a6cd851397","type":"artist","uuid":"c199864f-a2e1-4712-8220-12c03d9c7dbf"}
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 0xd131de0fc1e1512bc265c543da7aad542d957b5b94e75eb8dd5905926775bb5f. 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/c199864f-a2e1-4712-8220-12c03d9c7dbf.json and https://artists.proofprofile.net/proofs/artist/c199864f-a2e1-4712-8220-12c03d9c7dbf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T07:29:20Z
  text: {"copyright_id":"0xd131de0fc1e1512bc265c543da7aad542d957b5b94e75eb8dd5905926775bb5f","name":"Offerdals Spelmanslag","registered_at":"2026-06-20T19:52:59Z","symbol":"NIM1697771","token_address":"0xf2b9baeb7571a00283f6dee9c5d004a6cd851397","type":"artist","uuid":"c199864f-a2e1-4712-8220-12c03d9c7dbf"}
album: Offerdalsminnen
  type: MusicAlbum
  date published: 1987-12-01
album: På gehör - å je höör!
  type: MusicAlbum
  date published: 1993-12-01
album: Det himmelska mumset
  type: MusicAlbum
  date published: 1998-12-15
album: Dänsnördu (Live)
  type: MusicAlbum
  date published: 2001-11-01
album: Till vänner
  type: MusicAlbum
  date published: 2002-12-01
album: Nolasjölåtar
  type: MusicAlbum
  date published: 2007-12-01
album: Hemma
  type: MusicAlbum
  date published: 2011-04-15