Leikhópurinn Síglaðir söngvarar
type: MusicGroup
genre: children's music
popularity: 3
followers: 115
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xca64cdc2bd5856b62dc0bacbb2fe3728a4e6fdee0a0fceafe0c26ae18899dbd5
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/475372f2-b152-47c0-88e9-77749ebca0b1.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/475372f2-b152-47c0-88e9-77749ebca0b1.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/475372f2-b152-47c0-88e9-77749ebca0b1
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xca64cdc2bd5856b62dc0bacbb2fe3728a4e6fdee0a0fceafe0c26ae18899dbd5","name":"Leikhópurinn Síglaðir söngvarar","registered_at":"2026-06-16T14:25:19Z","symbol":"NIM1079942","token_address":"0x3270dba08b0c7eadd8022bd197bcd504aca6da1e","type":"artist","uuid":"475372f2-b152-47c0-88e9-77749ebca0b1"}
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 0xca64cdc2bd5856b62dc0bacbb2fe3728a4e6fdee0a0fceafe0c26ae18899dbd5. 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/475372f2-b152-47c0-88e9-77749ebca0b1.json and https://artists.proofprofile.net/proofs/artist/475372f2-b152-47c0-88e9-77749ebca0b1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0xca64cdc2bd5856b62dc0bacbb2fe3728a4e6fdee0a0fceafe0c26ae18899dbd5","name":"Leikhópurinn Síglaðir söngvarar","registered_at":"2026-06-16T14:25:19Z","symbol":"NIM1079942","token_address":"0x3270dba08b0c7eadd8022bd197bcd504aca6da1e","type":"artist","uuid":"475372f2-b152-47c0-88e9-77749ebca0b1"}
album: Síglaðir söngvarar
  type: MusicAlbum
  date published: 1973-01-01