Marquina-Selfa Trio
type: MusicGroup
genre: smooth jazz
popularity: 3
followers: 54
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xfe71f4522a3736a41627c9477289d26a49382700d0ef39f63f13bfb74bc47cb2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954717
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954717
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f2e594b3-9565-464d-b65f-cdbe5fee53d6.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f2e594b3-9565-464d-b65f-cdbe5fee53d6.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f2e594b3-9565-464d-b65f-cdbe5fee53d6
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T15:47:51Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xfe71f4522a3736a41627c9477289d26a49382700d0ef39f63f13bfb74bc47cb2","name":"Marquina-Selfa Trio","registered_at":"2026-06-21T13:59:29Z","symbol":"NIM1941116","token_address":"0xf20a36473755102dec3e2e5bf4855c48be0b4ffc","type":"artist","uuid":"f2e594b3-9565-464d-b65f-cdbe5fee53d6"}
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 0xfe71f4522a3736a41627c9477289d26a49382700d0ef39f63f13bfb74bc47cb2. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2e594b3-9565-464d-b65f-cdbe5fee53d6.json and https://artists.proofprofile.net/proofs/artist/f2e594b3-9565-464d-b65f-cdbe5fee53d6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T15:47:51Z
  text: {"copyright_id":"0xfe71f4522a3736a41627c9477289d26a49382700d0ef39f63f13bfb74bc47cb2","name":"Marquina-Selfa Trio","registered_at":"2026-06-21T13:59:29Z","symbol":"NIM1941116","token_address":"0xf20a36473755102dec3e2e5bf4855c48be0b4ffc","type":"artist","uuid":"f2e594b3-9565-464d-b65f-cdbe5fee53d6"}