Ludwig Hoelscher
type: MusicGroup
genre: chamber music
description: Ludwig Hoelscher (23 August 19078 May 1996) was a German cellist. He played internationally as a soloist, and was well known as a chamber musician, first playing from 1932 in Elly Ney's piano trio, th
popularity: 15
followers: 111
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSProofURL
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  value: https://artists.proofprofile.net/proofs/artist/3d80570e-adf8-4601-9821-8abee95a7910.ots
additional property: OTSRecordURL
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additional property: OTSTimestamp
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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 0xea9b3b151186aec49080d269680f22bc7075908273d178f492cfeb493c8ecfad. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d80570e-adf8-4601-9821-8abee95a7910.json and https://artists.proofprofile.net/proofs/artist/3d80570e-adf8-4601-9821-8abee95a7910.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T14:31:42Z
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album: Milestones of a Piano Legend: Elly Ney, Vol. 5
  type: MusicAlbum
  date published: 2019-06-21