Leonard Toland
type: MusicGroup
popularity: 23
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xda77dc50dde3fa7d6de89595abc361a3a0a4ac2921abadd132b62304afee6b80
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/14504e49-cfb9-47b1-9988-c7d23b90023c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/14504e49-cfb9-47b1-9988-c7d23b90023c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/14504e49-cfb9-47b1-9988-c7d23b90023c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xda77dc50dde3fa7d6de89595abc361a3a0a4ac2921abadd132b62304afee6b80","name":"Leonard Toland","registered_at":"2026-06-11T12:21:10Z","symbol":"NIM0026666","token_address":"0x11201d400766d3e2c8d415b76a227d7e4454a1f8","type":"artist","uuid":"14504e49-cfb9-47b1-9988-c7d23b90023c"}
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 0xda77dc50dde3fa7d6de89595abc361a3a0a4ac2921abadd132b62304afee6b80. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14504e49-cfb9-47b1-9988-c7d23b90023c.json and https://artists.proofprofile.net/proofs/artist/14504e49-cfb9-47b1-9988-c7d23b90023c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T21:20:00Z
  text: {"copyright_id":"0xda77dc50dde3fa7d6de89595abc361a3a0a4ac2921abadd132b62304afee6b80","name":"Leonard Toland","registered_at":"2026-06-11T12:21:10Z","symbol":"NIM0026666","token_address":"0x11201d400766d3e2c8d415b76a227d7e4454a1f8","type":"artist","uuid":"14504e49-cfb9-47b1-9988-c7d23b90023c"}
album: 일생
  type: MusicAlbum
  date published: 2025-02-12