Speelwark
type: MusicGroup
genre: sea shanties
popularity: 4
followers: 327
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xee567266b484875dd27c3928f5b852c821f06d0ed4dc8e25a91bbba3c347e354
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/480a26fa-e3b1-4dd5-9f7b-0246cbaec64c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/480a26fa-e3b1-4dd5-9f7b-0246cbaec64c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/480a26fa-e3b1-4dd5-9f7b-0246cbaec64c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
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 0xee567266b484875dd27c3928f5b852c821f06d0ed4dc8e25a91bbba3c347e354. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/480a26fa-e3b1-4dd5-9f7b-0246cbaec64c.json and https://artists.proofprofile.net/proofs/artist/480a26fa-e3b1-4dd5-9f7b-0246cbaec64c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
album: 10 Jahre Speelwark - Ein Stück vom Norden
  type: MusicAlbum
  date published: 1992-10-01
album: een frische Wind
  type: MusicAlbum
  date published: 1996
album: een frische Wind
  type: MusicAlbum
  date published: 1996-10-14
album: Wintertied
  type: MusicAlbum
  date published: 1997-10-20
album: 15 Johr-ünner Wulken un Wind
  type: MusicAlbum
  date published: 1999
album: 15 Johr-ünner Wulken un Wind
  type: MusicAlbum
  date published: 1999-10-25
album: Land der Horizonte
  type: MusicAlbum
  date published: 2003-10-27
album: Hallo Tag, komm herein
  type: MusicAlbum
  date published: 2009-06-12