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 0x55415910f94649b74f95b722de8412685b2e893aa699a242420ad7e4c2c26462. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81cdc15a-39de-43d3-9435-7006d0910e01.json and https://artists.proofprofile.net/proofs/artist/81cdc15a-39de-43d3-9435-7006d0910e01.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lars Vogt & Friends Live in Heimbach, Vol. 2
Beethoven: Piano Concerto No. 2 in B-Flat Major, Op. 19: III. Rondo. Molto allegro
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 0x7eda5ee9f3747c8b7b04fe34fc36d158292d0d51d9c6668d7b6fc281ba393dc7. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEA349502149.
Dichterliebe, Op. 48: I. Im wunderschönen Monat Mai - Arr. for Cello
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc401d8861fa846c5e18f1193707c03618d132364f7989160afb7f6b42a9e1a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DES381912000.
Dichterliebe, Op. 48: VIII. Und wüssten's die Blumen - Arr. for Cello
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39b540da8944518f87e5ea8c40b39210129255e28f916f2ef4fc37d029694f7. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DES381912007.
Dichterliebe, Op. 48: IX. Das ist ein Flöten und Geigen - Arr. for Cello
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe1993ce01e426e0541f3f80ec41409b36eadf4f124ef4b8bb69d5b9086b26d. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DES381912008.
Brahms: Opus 38 & 99 (Sonatas for Piano and Cello)
Cello Sonata No. 1, Op. 38 in E Minor: I. Allegro non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c06f6281657fbe1f9ac0eb5346f3172ee9298b927bb9784385b098527c8a09. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DES381811000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33ddc86e52b43a9221df237ecdd0a99c8ccdd3ee48f370bfc09eaa57ff82918. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DES381811007.
Fünf Gesänge, Op. 105 No. 1: Wie Melodien zieht es mir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa44b8b302b2a0258edbbf937ffe65a74638536b99c0779d8c3aea40c49862a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES381811010.
Chisholm - Schmickler: Solo and Accompaniment
Adagio & Allegro, Op. 70: I. Langsam, mit innigem Ausdruck
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cab3090f53211cab40dbd8c3ead2643c244fb675097096863667978ed1139e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DES382311004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b5c1baf4c2eb20e16eb49411baabd167d2f8e077c4843631a41a4e73219e34. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DES382107007.
Beethoven: Trios for Clarinet, Cello & Piano
Trio for Piano, Clarinet and Cello in B-Flat Major, Op. 11 "Gassenhauer": I. Allegro con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a0314385a80231a9ca2e54815bad1102ecfff3b839f54fed21cfcafab1f160. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/FR50X1740501.
Trio for Piano, Clarinet and Cello in B-Flat Major, Op. 11 "Gassenhauer": II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76323b87456e28ac270bc9f4a0a3d173b723168f21ae8c953f746bef93f36eb8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1740502.
Trio for Piano, Clarinet and Cello in B-Flat Major, Op. 11 "Gassenhauer": III. Tema con variazioni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90258618546ae513d5625a09225def9090cd5b7e199e76a50d749ed2e71999f. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FR50X1740503.
Trio for Piano, Clarinet and Cello in E-Flat Major, Op. 38 (After Septet Op. 20): I. Adagio – Allegro con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1454bc682f0645739ff8f325f227a87604c7ab4bc7bed6ac13bcdf4a87a1c634. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR50X1740504.
Dvořák: Sonatine, Op. 100 - Tchaikovsky: Piano Trio, Op. 50
Dvořák: Violin Sonatina in G Major, Op. 100, B. 183 "Indian Lament": I. Allegro risoluto (Live, 2004)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4deb090af51a43c2f4c5fdfeb3e51291a45236ba07ac7adc77f9f28c6cb5b5c9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA340500296.
Dvořák: Violin Sonatina in G Major, Op. 100, B. 183 "Indian Lament": II. Larghetto (Live, 2004)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ffbaf44bdfa7966114aac487eaef7d6fa0935965774a1a658a09edaa28d1fc. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA340500297.
Dvořák: Violin Sonatina in G Major, Op. 100, B. 183 "Indian Lament": III. Scherzo. Molto vivace (Live, 2004)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b6688c76559dcc27066ec4883a6b0bef33a5d2ad5e7e613d17f2b46ffb5d8a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEA340500298.
Dvořák: Violin Sonatina in G Major, Op. 100, B. 183 "Indian Lament": IV. Finale. Allegro (Live, 2004)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b3692d4b3fdc559dac801bfe5db0251ab2797ecf3748db074c04a5ca5f680d. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEA340500299.
Strauss: Don Juan, Till Eulenspiegel, Don Quixote
Trio for Flute, Violin and Piano: I. Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e23d62cedcfc85caf98b8d577e88b889f4bb796f637b608d0eea4333a21fab. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FR50X2074601.
Trio for Flute, Violin and Piano: II. Andante sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd69a255610ca2792dafca6ec134a1a3cf127342ad350c6371eb67f93c1f8c14. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR50X2074602.
Trio for Flute, Violin and Piano: III. Allegro vivace con spirito
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd9a998fcb4586a6bff6837da58b7cef5d751992230cbd856c442f8c00e56f0. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/FR50X2074603.
Valzer sul nome Bach: No. 1, Circus-Valzer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc776c7c4450d0786e3d66c691b1f2757e743105d0b3cb767fba44dea6a7e0b3e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR50X2074604.
Valzer sul nome Bach: No. 2, Valzer-Carillon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4459ca278b8936ca5f44399b656891f4e8743b0dc0a98ce5314e7a8ed4cc9ed. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/FR50X2074605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1062d7db8decb7e591fddf7885fef19abf8f0932cb03f208f04e20a64aa2761e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X2074606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30925cdb87c484f7ff1e19a80de0cd9179a7292b287a675c04f3d812196e825c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR50X2074607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0462223688f6f0f8db044534f65b6069e5c527a0622a48240cbf75ea3ec9a84e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR50X2074609.
Trio for Cello, Clarinet and Piano: II. Andante
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc64eea462979cf27916a5725a7359fba29a659dcde12b5e0aedda81ef8df17. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/FR50X2074615.
Penderecki: Music for Violin, Cello & Orchestra
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Philippe Quint plays Tchaikovsky & Arensky
Hommage zum 200. Todestag von Joseph Haydn
Staatliches Symphonieorchester Kaliningrad / Königsberg
GAIA Music Festival 2015: Music of De Falla, Medtner & Schnyder (Live)
Concert de Chausson - Quintette de Vierne
Ernest Chausson - Concert pour violon, piano et quatuor à cordes en ré majeur Op. 21: I - Décidé
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Ernest Chausson - Concert pour violon, piano et quatuor à cordes en ré majeur Op. 21: II - Sicilienne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4134bb42eabef97f059145804056ea830bbaa18aba314b3fe52fbc6fd044fd. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR07X2400132.
Ernest Chausson - Concert pour violon, piano et quatuor à cordes en ré majeur Op. 21: III - Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20ad73ab181991d9f0559bc20800dc223693fd8086a5296882ef315d2091ceb. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FR07X2400133.
Ernest Chausson - Concert pour violon, piano et quatuor à cordes en ré majeur Op. 21: IV - Finale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17896b4f3cdca91eea538d2ed05ed6a7b512d27eea84d1bca89bd8ea9210b0af. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR07X2400134.
Louis Vierne - Quintette pour piano, 2 violons, alto et violoncelle Op. 42: I - Poco lento
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Louis Vierne - Quintette pour piano, 2 violons, alto et violoncelle Op. 42: II - Larghetto sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd9adaeb0b0a470bb0f8fd20946a6cf02a9b02086e5b890a6a03ba9981a89f5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR07X2400142.
Louis Vierne - Quintette pour piano, 2 violons, alto et violoncelle Op. 42: III - Maestoso
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