Jang Gyehyun
type: MusicGroup
genre: k-ballad
popularity: 2
followers: 18
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc74c0bfafdb7ce18f4067f327061cf39dbfa0c11d82580666b1330c9e04f3854
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4b000e29-8c86-41f4-97e2-be251184e68a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4b000e29-8c86-41f4-97e2-be251184e68a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/4b000e29-8c86-41f4-97e2-be251184e68a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc74c0bfafdb7ce18f4067f327061cf39dbfa0c11d82580666b1330c9e04f3854","name":"Jang Gyehyun","registered_at":"2026-06-16T15:41:23Z","symbol":"NIM1098110","token_address":"0xeb348117c4cf8b077d1bdb97071326c518be901a","type":"artist","uuid":"4b000e29-8c86-41f4-97e2-be251184e68a"}
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 0xc74c0bfafdb7ce18f4067f327061cf39dbfa0c11d82580666b1330c9e04f3854. 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/4b000e29-8c86-41f4-97e2-be251184e68a.json and https://artists.proofprofile.net/proofs/artist/4b000e29-8c86-41f4-97e2-be251184e68a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0xc74c0bfafdb7ce18f4067f327061cf39dbfa0c11d82580666b1330c9e04f3854","name":"Jang Gyehyun","registered_at":"2026-06-16T15:41:23Z","symbol":"NIM1098110","token_address":"0xeb348117c4cf8b077d1bdb97071326c518be901a","type":"artist","uuid":"4b000e29-8c86-41f4-97e2-be251184e68a"}
album: 나의 20년/그대보고파
  type: MusicAlbum
  date published: 1977-06-08
album: 햇빛 쏟아지는 들판
  type: MusicAlbum
  date published: 1978-02-05
album: My Youth Again/Sunshining Field/You
  type: MusicAlbum
  date published: 1984-02-06
album: 장계현
  type: MusicAlbum
  date published: 2012-07-27