Don Spencer
type: MusicGroup
description: Donald Richard Spencer (born 22 March 1937) is an Australian singer-songwriter, musician, and former children's television presenter, he also hosted his own teenage television and radio music variety
popularity: 6
followers: 1
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc33755317e7733c1876077a38de7d877bdf60c988dcd3b529ddabeb133d95559
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953972
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953972
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2a95f2c1-720a-4d7c-a7a6-d8d21bed3c7d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2a95f2c1-720a-4d7c-a7a6-d8d21bed3c7d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2a95f2c1-720a-4d7c-a7a6-d8d21bed3c7d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T16:31:10Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc33755317e7733c1876077a38de7d877bdf60c988dcd3b529ddabeb133d95559","name":"Don Spencer","registered_at":"2026-06-16T04:20:31Z","symbol":"NIM0935592","token_address":"0x7bc827c41e413c27c14692f13e3892a650c3f700","type":"artist","uuid":"2a95f2c1-720a-4d7c-a7a6-d8d21bed3c7d"}
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 0xc33755317e7733c1876077a38de7d877bdf60c988dcd3b529ddabeb133d95559. Chain 2 (Bitcoin): anchored in block 953972 (2026-06-16T16:31:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a95f2c1-720a-4d7c-a7a6-d8d21bed3c7d.json and https://artists.proofprofile.net/proofs/artist/2a95f2c1-720a-4d7c-a7a6-d8d21bed3c7d.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-16T16:31:10Z
  text: {"copyright_id":"0xc33755317e7733c1876077a38de7d877bdf60c988dcd3b529ddabeb133d95559","name":"Don Spencer","registered_at":"2026-06-16T04:20:31Z","symbol":"NIM0935592","token_address":"0x7bc827c41e413c27c14692f13e3892a650c3f700","type":"artist","uuid":"2a95f2c1-720a-4d7c-a7a6-d8d21bed3c7d"}