Liederfreund
type: MusicGroup
genre: christmas
popularity: 5
followers: 268
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xed67f5ce1d10f22c6fb7adebcf48c524957113bed0bbeb630f3ac48f26d9c907
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953997
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953997
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1cfc86a1-cb61-4486-b496-5153384a306b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1cfc86a1-cb61-4486-b496-5153384a306b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1cfc86a1-cb61-4486-b496-5153384a306b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T20:07:57Z
additional property: OTSCanonicalRecord
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 0xed67f5ce1d10f22c6fb7adebcf48c524957113bed0bbeb630f3ac48f26d9c907. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1cfc86a1-cb61-4486-b496-5153384a306b.json and https://artists.proofprofile.net/proofs/artist/1cfc86a1-cb61-4486-b496-5153384a306b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
album: Deutsche Volkslieder
  type: MusicAlbum
  date published: 2008-12-19
album: Deutsche Volkslieder Vol.2
  type: MusicAlbum
  date published: 2009-01-02
album: Liederfreund (Deutsche Volklieder Vol. 3)
  type: MusicAlbum
  date published: 2009-03-17
album: Liederfreund Vol. 4 (Kinderlieder)
  type: MusicAlbum
  date published: 2009-03-27
album: Childrens Lullaby (Instrumental Lieder Zum Einschlafen)
  type: MusicAlbum
  date published: 2009-07-24
album: Childrens Lullaby (ドイツの童謡 おやすみ前の２０曲 インストルメンタル)
  type: MusicAlbum
  date published: 2009-07-24