Abdelkarim Hamdan
type: MusicGroup
popularity: 3
followers: 346
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5d5f9b667325947684dcdc45bcf82a0dd4e7fed8d86033e3238d0c09d59069e9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954139
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954139
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7fc070b5-83e4-45b4-becd-548195ef9069.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7fc070b5-83e4-45b4-becd-548195ef9069.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7fc070b5-83e4-45b4-becd-548195ef9069
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T21:12:18Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x5d5f9b667325947684dcdc45bcf82a0dd4e7fed8d86033e3238d0c09d59069e9","name":"Abdelkarim Hamdan","registered_at":"2026-06-17T10:12:18Z","symbol":"NIM1363118","token_address":"0x8ed3f0351b441c7aee50c833dc7cd09f620d87fc","type":"artist","uuid":"7fc070b5-83e4-45b4-becd-548195ef9069"}
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 0x5d5f9b667325947684dcdc45bcf82a0dd4e7fed8d86033e3238d0c09d59069e9. Chain 2 (Bitcoin): anchored in block 954139 (2026-06-17T21:12:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7fc070b5-83e4-45b4-becd-548195ef9069.json and https://artists.proofprofile.net/proofs/artist/7fc070b5-83e4-45b4-becd-548195ef9069.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T21:12:18Z
  text: {"copyright_id":"0x5d5f9b667325947684dcdc45bcf82a0dd4e7fed8d86033e3238d0c09d59069e9","name":"Abdelkarim Hamdan","registered_at":"2026-06-17T10:12:18Z","symbol":"NIM1363118","token_address":"0x8ed3f0351b441c7aee50c833dc7cd09f620d87fc","type":"artist","uuid":"7fc070b5-83e4-45b4-becd-548195ef9069"}
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