Francesc Cassú
type: MusicGroup
popularity: 4
followers: 93
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb9000af96cde745a812119a7fbe4704d88e836c33abbbfe743ff3f96d2abf538
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954047
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954047
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/41377cfd-dce3-4143-84b4-c7a35cb52eb7.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/41377cfd-dce3-4143-84b4-c7a35cb52eb7.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/41377cfd-dce3-4143-84b4-c7a35cb52eb7
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T04:56:08Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xb9000af96cde745a812119a7fbe4704d88e836c33abbbfe743ff3f96d2abf538","name":"Francesc Cassú","registered_at":"2026-06-16T12:16:28Z","symbol":"NIM1049203","token_address":"0x020f7b7d721a5fb87754bd446d2a7e8476200b63","type":"artist","uuid":"41377cfd-dce3-4143-84b4-c7a35cb52eb7"}
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 0xb9000af96cde745a812119a7fbe4704d88e836c33abbbfe743ff3f96d2abf538. Chain 2 (Bitcoin): anchored in block 954047 (2026-06-17T04:56:08Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41377cfd-dce3-4143-84b4-c7a35cb52eb7.json and https://artists.proofprofile.net/proofs/artist/41377cfd-dce3-4143-84b4-c7a35cb52eb7.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-17T04:56:08Z
  text: {"copyright_id":"0xb9000af96cde745a812119a7fbe4704d88e836c33abbbfe743ff3f96d2abf538","name":"Francesc Cassú","registered_at":"2026-06-16T12:16:28Z","symbol":"NIM1049203","token_address":"0x020f7b7d721a5fb87754bd446d2a7e8476200b63","type":"artist","uuid":"41377cfd-dce3-4143-84b4-c7a35cb52eb7"}
album: Llull
  type: MusicAlbum
  date published: 2018-11-23