Saber Bamatraf
type: MusicGroup
description: Saber Bamatraf () is a Yemeni musician and cultural activist. He is a self-taught pianist and composer known for his activism and artistic collaboration with his wife the visual artist Shatha Altowai.
popularity: 6
followers: 171
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953932
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  value: https://artists.proofprofile.net/proofs/artist/1db6114e-97d2-474e-981e-c003847c0474.ots
additional property: OTSRecordURL
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  value: https://artists.proofprofile.net/proofs/artist/1db6114e-97d2-474e-981e-c003847c0474.json
additional property: OTSVerificationAPI
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  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1db6114e-97d2-474e-981e-c003847c0474
additional property: OTSTimestamp
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  value: 2026-06-16T11:10:43Z
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
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba87646d91bfece322a4c745dce9e4d7bd6d8c6530bf30e5a789fa2571a2989. Chain 2 (Bitcoin): anchored in block 953932 (2026-06-16T11:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1db6114e-97d2-474e-981e-c003847c0474.json and https://artists.proofprofile.net/proofs/artist/1db6114e-97d2-474e-981e-c003847c0474.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T11:10:43Z
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