Jaroslav Kvapil
type: MusicGroup
description: Jaroslav Kvapil (25 September 1868 – 10 January 1950) was a Czech poet, theatre director, translator, playwright and librettist. Early life, education and family Jaroslav Josef Kvapil was born on 25
popularity: 4
followers: 17
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additional property: CopyrightChainExplorerURL
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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 0xceb1af88590487019de5107e4f7c03b9ef64dc5b973f088235af95c03bc3e916. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d126b691-1134-425a-ac02-2b52f6c68f7f.json and https://artists.proofprofile.net/proofs/artist/d126b691-1134-425a-ac02-2b52f6c68f7f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T02:46:24Z
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track: Rusalka: Song to the Moon
track: Rusalka, Act I: Měsíčku na nebi hlubokém

Rusalka: Song to the Moon
type: MusicRecording
duration: PT6M24S
duration ms: 384960
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by artist: Antonín Dvořák
by artist: Jaroslav Kvapil
by artist: Yvonne Kenny
by artist: Vladimir Kamirski
by artist: Melbourne Symphony Orchestra
in album: Simple Gifts
  type: MusicAlbum
  date published: 1994
genre: classical
genre: late-romantic-era
genre: czech-classical
isrc code: AUAB09450001
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  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
additional property: ProofProfileEvidenceStatus
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b8db2da5144ab92d3be8a222a649edbbd9acaee3835caad53f0023bff78b4c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/AUAB09450001.
  date published: 2026-07-02T03:55:08Z
audio: Rusalka: Song to the Moon
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  additional property: Danceability
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Key Name
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Rusalka, Act I: Měsíčku na nebi hlubokém
type: MusicRecording
duration: PT6M20S
duration ms: 380000
explicit: false
by artist: Antonín Dvořák
by artist: Jaroslav Kvapil
by artist: Marina Rebeka
by artist: Marco Boemi
by artist: Wrocław Opera Orchestra
in album: Essence
  type: MusicAlbum
  date published: 2023-11-24
genre: classical
genre: late-romantic-era
genre: czech-classical
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T06:42:11Z
audio: Rusalka, Act I: Měsíčku na nebi hlubokém
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  additional property: Danceability
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  additional property: Speechiness
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  additional property: Mode Name
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  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 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