Maria Papadopoulou
type: MusicGroup
description: Maria Papadopoulou (; born September 8, 1980) is a Cypriot former swimmer who specialized in butterfly events. She set a Cypriot record of 1:01.67 to earn a bronze medal in the 100 m butterfly at the
popularity: 4
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerifyInstructions
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  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 0x87c63250be69fa5f516e087c9a3fb16bdf12fb416f8f7568d2929f500011f2ee. Chain 2 (Bitcoin): anchored in block 953886 (2026-06-16T04:37:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0afe0383-9cb7-4a01-ae70-6b1da06d6a09.json and https://artists.proofprofile.net/proofs/artist/0afe0383-9cb7-4a01-ae70-6b1da06d6a09.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T04:37:45Z
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album: Labyrinth
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  date published: 2025-09-22
  track: Labyrinth
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    by artist: Maria Papadopoulou
    in album: Labyrinth
      type: MusicAlbum
      date published: 2025-09-22
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    additional property: OTSVerifyInstructions
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      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
    subject of: OpenTimestamps Proof of Existence
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      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9be5ad098e2899d01ee741a518beaa0d8ed3440f934382ced2bbb27cac05977. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:44:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BE4NS2400987.
      date published: 2026-07-15T22:44:28Z
    audio: Labyrinth
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      additional property: Key Name
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