Gro Merete Hjertvik
type: MusicGroup
genre: neoclassical
popularity: 5
followers: 13
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xeae8282d3a43adc60097446abc20d02732bc259207a1e236bdcdb1dfbb4430b8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953959
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953959
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/270699d0-7c51-44db-b205-cf368c237e48.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/270699d0-7c51-44db-b205-cf368c237e48.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/270699d0-7c51-44db-b205-cf368c237e48
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T14:51:55Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xeae8282d3a43adc60097446abc20d02732bc259207a1e236bdcdb1dfbb4430b8","name":"Gro Merete Hjertvik","registered_at":"2026-06-16T03:06:25Z","symbol":"NIM0917892","token_address":"0x28e41004e8ca43784e5688d4da2e4160dc3135e5","type":"artist","uuid":"270699d0-7c51-44db-b205-cf368c237e48"}
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 0xeae8282d3a43adc60097446abc20d02732bc259207a1e236bdcdb1dfbb4430b8. Chain 2 (Bitcoin): anchored in block 953959 (2026-06-16T14:51:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/270699d0-7c51-44db-b205-cf368c237e48.json and https://artists.proofprofile.net/proofs/artist/270699d0-7c51-44db-b205-cf368c237e48.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T14:51:55Z
  text: {"copyright_id":"0xeae8282d3a43adc60097446abc20d02732bc259207a1e236bdcdb1dfbb4430b8","name":"Gro Merete Hjertvik","registered_at":"2026-06-16T03:06:25Z","symbol":"NIM0917892","token_address":"0x28e41004e8ca43784e5688d4da2e4160dc3135e5","type":"artist","uuid":"270699d0-7c51-44db-b205-cf368c237e48"}