Sakuya Sakuma (CV: Kodai Sakai)
type: MusicGroup
popularity: 2
followers: 298
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xca96f3a7e7d91aa58b07c9c4e76081d8ad31e6eb407ccae3f2e262c281e2a436
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954659
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954659
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/dcf1484c-c5a1-48d3-94fc-d01839940356.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/dcf1484c-c5a1-48d3-94fc-d01839940356.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/dcf1484c-c5a1-48d3-94fc-d01839940356
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T06:14:42Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xca96f3a7e7d91aa58b07c9c4e76081d8ad31e6eb407ccae3f2e262c281e2a436","name":"Sakuya Sakuma (CV: Kodai Sakai)","registered_at":"2026-06-21T05:16:10Z","symbol":"NIM1831151","token_address":"0x5d808c644fed2c7cc1829d9ac132cae529251a06","type":"artist","uuid":"dcf1484c-c5a1-48d3-94fc-d01839940356"}
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 0xca96f3a7e7d91aa58b07c9c4e76081d8ad31e6eb407ccae3f2e262c281e2a436. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dcf1484c-c5a1-48d3-94fc-d01839940356.json and https://artists.proofprofile.net/proofs/artist/dcf1484c-c5a1-48d3-94fc-d01839940356.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T06:14:42Z
  text: {"copyright_id":"0xca96f3a7e7d91aa58b07c9c4e76081d8ad31e6eb407ccae3f2e262c281e2a436","name":"Sakuya Sakuma (CV: Kodai Sakai)","registered_at":"2026-06-21T05:16:10Z","symbol":"NIM1831151","token_address":"0x5d808c644fed2c7cc1829d9ac132cae529251a06","type":"artist","uuid":"dcf1484c-c5a1-48d3-94fc-d01839940356"}