Handmaa B.
type: MusicGroup
popularity: 3
followers: 21
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xba55e7c21e60f181416e8c188f67d669af881269c014d3f296793613cf285ae9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953968
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953968
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/286ece75-7754-45c4-8df9-e9d0d8c2fdec.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/286ece75-7754-45c4-8df9-e9d0d8c2fdec.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/286ece75-7754-45c4-8df9-e9d0d8c2fdec
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T16:01:49Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xba55e7c21e60f181416e8c188f67d669af881269c014d3f296793613cf285ae9","name":"Handmaa B.","registered_at":"2026-06-16T03:54:59Z","symbol":"NIM0929492","token_address":"0x257bd33478130943c9d6274bc8e7029b494d3f5e","type":"artist","uuid":"286ece75-7754-45c4-8df9-e9d0d8c2fdec"}
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 0xba55e7c21e60f181416e8c188f67d669af881269c014d3f296793613cf285ae9. Chain 2 (Bitcoin): anchored in block 953968 (2026-06-16T16:01:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/286ece75-7754-45c4-8df9-e9d0d8c2fdec.json and https://artists.proofprofile.net/proofs/artist/286ece75-7754-45c4-8df9-e9d0d8c2fdec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T16:01:49Z
  text: {"copyright_id":"0xba55e7c21e60f181416e8c188f67d669af881269c014d3f296793613cf285ae9","name":"Handmaa B.","registered_at":"2026-06-16T03:54:59Z","symbol":"NIM0929492","token_address":"0x257bd33478130943c9d6274bc8e7029b494d3f5e","type":"artist","uuid":"286ece75-7754-45c4-8df9-e9d0d8c2fdec"}