Free J
type: MusicGroup
popularity: 4
followers: 600
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xcd411ec579a9b71994cd36ef8afcf59b90a1f9d8c0ca1292956a0f8fd703d0cf
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954742
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954742
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ff032524-b1df-4713-87ae-e3fa7fa52bae.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ff032524-b1df-4713-87ae-e3fa7fa52bae.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ff032524-b1df-4713-87ae-e3fa7fa52bae
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T20:46:40Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xcd411ec579a9b71994cd36ef8afcf59b90a1f9d8c0ca1292956a0f8fd703d0cf","name":"Free J","registered_at":"2026-06-21T18:25:10Z","symbol":"NIM1998816","token_address":"0x4bd7014678290243dcb650019c7a923d1492c80e","type":"artist","uuid":"ff032524-b1df-4713-87ae-e3fa7fa52bae"}
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 0xcd411ec579a9b71994cd36ef8afcf59b90a1f9d8c0ca1292956a0f8fd703d0cf. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff032524-b1df-4713-87ae-e3fa7fa52bae.json and https://artists.proofprofile.net/proofs/artist/ff032524-b1df-4713-87ae-e3fa7fa52bae.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-21T20:46:40Z
  text: {"copyright_id":"0xcd411ec579a9b71994cd36ef8afcf59b90a1f9d8c0ca1292956a0f8fd703d0cf","name":"Free J","registered_at":"2026-06-21T18:25:10Z","symbol":"NIM1998816","token_address":"0x4bd7014678290243dcb650019c7a923d1492c80e","type":"artist","uuid":"ff032524-b1df-4713-87ae-e3fa7fa52bae"}
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  type: MusicAlbum
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  type: MusicAlbum
  date published: 2019-08-19
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  type: MusicAlbum
  date published: 2019-10-14
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  date published: 2020-08-21
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  type: MusicAlbum
  date published: 2021-03-12
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  type: MusicAlbum
  date published: 2021-03-12
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  type: MusicAlbum
  date published: 2024-10-01
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  type: MusicAlbum
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