João Luis de Almeida
type: MusicGroup
genre: traditional music
description: João Luis de Almeida (born 1961) was a boxer from Angola. He represented his country at the 1980 Summer Olympics in Moscow, Soviet Union. He competed in the Men's Bantamweight (54 kg) division. He rec
popularity: 4
followers: 213
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0x690565533772cff4adabe44560168cf64928788882f32466aa89f81a760abadb
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953968
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/28bf5b93-52e2-4296-8267-004fa4db0ef6.ots
additional property: OTSRecordURL
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  value: https://artists.proofprofile.net/proofs/artist/28bf5b93-52e2-4296-8267-004fa4db0ef6.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/28bf5b93-52e2-4296-8267-004fa4db0ef6
additional property: OTSTimestamp
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  value: 2026-06-16T16:01:49Z
additional property: OTSCanonicalRecord
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690565533772cff4adabe44560168cf64928788882f32466aa89f81a760abadb. Chain 2 (Bitcoin): anchored in block 953968 (2026-06-16T16:01:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28bf5b93-52e2-4296-8267-004fa4db0ef6.json and https://artists.proofprofile.net/proofs/artist/28bf5b93-52e2-4296-8267-004fa4db0ef6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T16:01:49Z
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