Waldemar Henrique
type: MusicGroup
description: thumb|Waldemar Henrique,1949 Waldemar Henrique da Costa Pereira (February 15, 1905 – March 29, 1995) was a Brazilian pianist and composer. Waldemar Henrique was born in Belém do Pará, Brazil, of mixe
popularity: 2
followers: 370
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe1f239327d92409359f259c04ebfe49f53d6b48dc18c2d066e3d4782dc3d3c16
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954516
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954516
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a2d56595-0bbd-46f2-931f-55be645af1be.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a2d56595-0bbd-46f2-931f-55be645af1be.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a2d56595-0bbd-46f2-931f-55be645af1be
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T07:04:44Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe1f239327d92409359f259c04ebfe49f53d6b48dc18c2d066e3d4782dc3d3c16","name":"Waldemar Henrique","registered_at":"2026-06-20T06:20:58Z","symbol":"NIM1539180","token_address":"0x66a90b56c35429b1d2735abfc022b2408a298b95","type":"artist","uuid":"a2d56595-0bbd-46f2-931f-55be645af1be"}
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 0xe1f239327d92409359f259c04ebfe49f53d6b48dc18c2d066e3d4782dc3d3c16. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a2d56595-0bbd-46f2-931f-55be645af1be.json and https://artists.proofprofile.net/proofs/artist/a2d56595-0bbd-46f2-931f-55be645af1be.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T07:04:44Z
  text: {"copyright_id":"0xe1f239327d92409359f259c04ebfe49f53d6b48dc18c2d066e3d4782dc3d3c16","name":"Waldemar Henrique","registered_at":"2026-06-20T06:20:58Z","symbol":"NIM1539180","token_address":"0x66a90b56c35429b1d2735abfc022b2408a298b95","type":"artist","uuid":"a2d56595-0bbd-46f2-931f-55be645af1be"}