Sem Luca
type: MusicGroup
popularity: 11
followers: 129
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x77f6251e13c69c5648f5c954292385ca1d58d16959982c4e27b5cecdc36a159c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953772
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953772
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c77562c2-ce53-4b68-8af7-ee3176668c77.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c77562c2-ce53-4b68-8af7-ee3176668c77.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c77562c2-ce53-4b68-8af7-ee3176668c77
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T10:33:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x77f6251e13c69c5648f5c954292385ca1d58d16959982c4e27b5cecdc36a159c","name":"Sem Luca","registered_at":"2026-06-15T01:28:34Z","symbol":"NIM0639156","token_address":"0xd89ad51d8215f752df0acbbcd7a500ed8c2f798e","type":"artist","uuid":"c77562c2-ce53-4b68-8af7-ee3176668c77"}
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 0x77f6251e13c69c5648f5c954292385ca1d58d16959982c4e27b5cecdc36a159c. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c77562c2-ce53-4b68-8af7-ee3176668c77.json and https://artists.proofprofile.net/proofs/artist/c77562c2-ce53-4b68-8af7-ee3176668c77.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T10:33:29Z
  text: {"copyright_id":"0x77f6251e13c69c5648f5c954292385ca1d58d16959982c4e27b5cecdc36a159c","name":"Sem Luca","registered_at":"2026-06-15T01:28:34Z","symbol":"NIM0639156","token_address":"0xd89ad51d8215f752df0acbbcd7a500ed8c2f798e","type":"artist","uuid":"c77562c2-ce53-4b68-8af7-ee3176668c77"}
album: Takeoff
  type: MusicAlbum
  date published: 2019-04-12
album: Moving On
  type: MusicAlbum
  date published: 2019-06-14
album: Moving On (Club Mix)
  type: MusicAlbum
  date published: 2019-07-05
album: Olive Branch
  type: MusicAlbum
  date published: 2025-03-15
album: Stem van Nu
  type: MusicAlbum
  date published: 2025-10-24