Hardhead mmu
type: MusicGroup
popularity: 5
followers: 3673
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc5f17c8a9de23cba6ab9b84cb526da27f39ff9f09619c5d0678bfa7658f59834
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954063
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954063
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/471affd4-8b14-463e-8be8-06dd89d5ddfd.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/471affd4-8b14-463e-8be8-06dd89d5ddfd.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/471affd4-8b14-463e-8be8-06dd89d5ddfd
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T07:49:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc5f17c8a9de23cba6ab9b84cb526da27f39ff9f09619c5d0678bfa7658f59834","name":"Hardhead mmu","registered_at":"2026-06-16T14:41:03Z","symbol":"NIM1083705","token_address":"0x8927bdb1f031a956be88ebb93150a83f87245cb3","type":"artist","uuid":"471affd4-8b14-463e-8be8-06dd89d5ddfd"}
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 0xc5f17c8a9de23cba6ab9b84cb526da27f39ff9f09619c5d0678bfa7658f59834. 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/471affd4-8b14-463e-8be8-06dd89d5ddfd.json and https://artists.proofprofile.net/proofs/artist/471affd4-8b14-463e-8be8-06dd89d5ddfd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0xc5f17c8a9de23cba6ab9b84cb526da27f39ff9f09619c5d0678bfa7658f59834","name":"Hardhead mmu","registered_at":"2026-06-16T14:41:03Z","symbol":"NIM1083705","token_address":"0x8927bdb1f031a956be88ebb93150a83f87245cb3","type":"artist","uuid":"471affd4-8b14-463e-8be8-06dd89d5ddfd"}
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