Leo Cassalho
type: MusicGroup
popularity: 10
followers: 62
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4f58f48b2e437209c17270c4b6870949b6303dcb2cef268637e3d34877aa9ac3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953848
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953848
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/01857174-d899-4a4a-bbdf-b7673f5d7638.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/01857174-d899-4a4a-bbdf-b7673f5d7638.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/01857174-d899-4a4a-bbdf-b7673f5d7638
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T22:54:37Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x4f58f48b2e437209c17270c4b6870949b6303dcb2cef268637e3d34877aa9ac3","name":"Leo Cassalho","registered_at":"2026-06-15T14:07:27Z","symbol":"NIM0731981","token_address":"0x3d4255917979074507cf02f7d8538e40d98dd1e7","type":"artist","uuid":"01857174-d899-4a4a-bbdf-b7673f5d7638"}
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 0x4f58f48b2e437209c17270c4b6870949b6303dcb2cef268637e3d34877aa9ac3. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01857174-d899-4a4a-bbdf-b7673f5d7638.json and https://artists.proofprofile.net/proofs/artist/01857174-d899-4a4a-bbdf-b7673f5d7638.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T02:39:16Z
  text: {"copyright_id":"0x4f58f48b2e437209c17270c4b6870949b6303dcb2cef268637e3d34877aa9ac3","name":"Leo Cassalho","registered_at":"2026-06-15T14:07:27Z","symbol":"NIM0731981","token_address":"0x3d4255917979074507cf02f7d8538e40d98dd1e7","type":"artist","uuid":"01857174-d899-4a4a-bbdf-b7673f5d7638"}
album: Os Menino da Roça
  type: MusicAlbum
  date published: 2023-10-01
album: Motel do Peão
  type: MusicAlbum
  date published: 2025-01-28
album: Virado Um Pro Outro
  type: MusicAlbum
  date published: 2025-10-13