thumb|220px| Claude Antoine Jean Georges Napoléon Coste (27 June 1805 – 14 January 1883) was a French classical guitarist and composer. Biography Napoléon Coste was born in Amondans (Doubs), near Be
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfa562cfb9ee321b20c213580dfa98a812d18a3d2cf1269efa212c9eadf1d3b. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9fd677e-98e3-4281-bbe3-8a0415f58725.json and https://artists.proofprofile.net/proofs/artist/e9fd677e-98e3-4281-bbe3-8a0415f58725.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Napoléon Coste: Complete Guitar Works Vol. 5: Souvenirs
Fantaisie symphonique, Op. 28b, Pt. 1: I. Allegro - Andantino grazioso
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadac8986b6dd8264386c2d34fdcea464d4845973cba8c5ba674ae47161595a28. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI192238101 — a six-check JSON result.
Le départ, Op. 31: I. Introduction. Andante largo
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Napoléon Coste: Complete Guitar Works (Vol. 4: Feuilles d'automne)
Napoléon Coste: Complete Guitar Works, Vol. 3 - Le livre d'or du Guitariste
Napoléon Coste: Complete Guitar Works Vol. 2, Variations et Fantaisies
25 Études de genre, Op. 38: No. 1 - Allegretto
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25 Etudes for Guitar, Op. 38: Etude No. 1 in A Minor
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25 Etudes for Guitar, Op. 38: Etude No. 3 in D Minor
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25 Etudes for Guitar, Op. 38: Etude No. 4 in D Major
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25 Etudes for Guitar, Op. 38: Etude No. 5 in E Major
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25 Etudes for Guitar, Op. 38: Etude No. 6 in A Major
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25 Etudes for Guitar, Op. 38: Etude No. 14 in A Major
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Napoléon Coste: 25 Etudes for Guitar, Op. 38 (Midi Version)
Napoleon Coste: Op. 51 Récréation Du Guitariste (The Guitarist's Break)
Napoléon Coste: 25 Melodic and Progressive Studies. 1st Suite Of The Method, Op. 60 (Midi Version)
Napoléon Coste: 15 Valses favorites de Johann Strauss, Op. 7 (MIDI Version)
Coste, N.: Souvenirs / Recreation Du Guitariste
Le tournoi, Op. 15: Fantasie chevaleresque
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Coste: 25 Étude de Genre pour la Guitare, Op. 38
16 Valses favorites de Johann Strauss, Op. 7: II. Waltzes No. 6 - 10
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16 Valses favorites de Johann Strauss, Op. 7: IV. Waltz 16
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Napoléon Coste: Sérénade pour la guitare, Op. 30 (Midi Version)
Napoléon Coste: Mazurka pour la guitare, Op. 33 (Midi Version)
Napoléon Coste: Le passage des Alpes, Op. 27 (Midi Version)
Napoléon Coste: La chasse des sylphes, Op. 29 (Midi Version)
Napoléon Coste: Grand solo, Op. 24 (Midi Version)
Napoléon Coste: Fantaisie, Op. 36 (Midi Version)
Napoleon Coste: Op. 50 Adagio Et Divertissements
Napoleon Coste: Op. 47 La Source Du Lyson (The Lyson River Spring)
Napoleon Coste: Op. 46 Valse Favorite (Favorite Waltz)
Napoleon Coste: Op. 45 Divagation (Wandering)
Napoleon Coste: Op. 44 Andante Et Polonaise (Souvenirs Du Jura) (Memories Of Jura)