De Slijpers
type: MusicGroup
genre: polka
popularity: 15
followers: 361
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd384637756f802103f375982f13364fc3d578ed91c15e47fede97701caf15e59
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953827
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953827
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d92ddcae-60ab-4fed-854a-f55bc7239d7c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/d92ddcae-60ab-4fed-854a-f55bc7239d7c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/d92ddcae-60ab-4fed-854a-f55bc7239d7c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T19:59:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd384637756f802103f375982f13364fc3d578ed91c15e47fede97701caf15e59","name":"De Slijpers","registered_at":"2026-06-15T03:16:30Z","symbol":"NIM0664925","token_address":"0xf1e25fc70a60f608d249e60f6b9976461df2c6ad","type":"artist","uuid":"d92ddcae-60ab-4fed-854a-f55bc7239d7c"}
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 0xd384637756f802103f375982f13364fc3d578ed91c15e47fede97701caf15e59. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d92ddcae-60ab-4fed-854a-f55bc7239d7c.json and https://artists.proofprofile.net/proofs/artist/d92ddcae-60ab-4fed-854a-f55bc7239d7c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T19:59:56Z
  text: {"copyright_id":"0xd384637756f802103f375982f13364fc3d578ed91c15e47fede97701caf15e59","name":"De Slijpers","registered_at":"2026-06-15T03:16:30Z","symbol":"NIM0664925","token_address":"0xf1e25fc70a60f608d249e60f6b9976461df2c6ad","type":"artist","uuid":"d92ddcae-60ab-4fed-854a-f55bc7239d7c"}