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 0xe048f5f47759d3f326c4b83096a147907efeadc8bb58d79367f3bfbe6d4a2785. 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/d1237f0a-bb10-4d51-84b8-8ef6e4ed686b.json and https://artists.proofprofile.net/proofs/artist/d1237f0a-bb10-4d51-84b8-8ef6e4ed686b.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Lachner: Symphony No. 6, Op. 56 & Bassoon Concertino, Op. 23
Lachner: Symphony No. 3, Op. 41 & Festival Overture
Lachner: Septet in E-Flat Major & Nonet in F Major
Lachner, F.: Mass in F Major / Stabat Mater / Psalm 15, "Herr, Wer Wird Wohnen in Deiner Hutte"
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 0x3efbd76feef4a6d49b57c0c859f546287765240a20aa40a5988a20718af44bcd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB110601301 — a six-check JSON result.
Lachner, F.P.: Sangerfahrt / Der Sanger Am Rhein / 6 Deutsche Gesange
Lachner: Nonet in F Major & Octet in B-Flat Major, Op. 156
Antique Brasses: Original Brass Music on Period Instruments
Symphony No. 5 in C Minor, Op. 52, "Preis-Symphonie": I. Andante - Allegro
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Lachner: Suites No. 1, Op. 113 and No. 7, Op. 190
Schubert, Spohr, Lachner & Kalliwoda: Songs with Clarinet
Sonate No. 6 in D Major, Op. 13: I. Adagio
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Sonate No. 6 in D Major, Op. 13: III. Adagio
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Schubert: Auf Dem Strom / Schumann: Adagio and Allegro / Strauss Ii: Dolci Pianti
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b5e491b3ae72f18a41dcd7fe788841fc86c80b756f1a7bf114a17f4d4e28c8. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/HUA253158502 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24591107013d151d09106029efae17a4d91069aa987206107508c923e4c0d98a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HUA253158505 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc090fe04e3742d7128bf89927dc6b5171877cd7cb94a0037d504297a0f662553. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUA253158508 — a six-check JSON result.
Joan Sutherland - Complete Decca Studio Recitals
I Puritani / Act 1: "Son vergin vezzosa"
Orchestra of the Royal Opera House, Covent Garden
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Horn Recital: Marsolais, Louis-Philippe - Strauss, R. / Strauss, F.J. / Lachner, F.P. / Schumann, R. / Pilss, K. (The German Romantic Horn)
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fec34bba7917c4b48070c3b7e9a08ce45d6bff8aed8346a37598d84d0bdb9c. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU920658205 — a six-check JSON result.
Songs by Schubert's Friends & Contemporaries
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Die Verschworenen (Der häusliche Krieg), D.787: Romanze
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2563364577daff4d24607b073e7d41af547740b33ff6c6b91ede84ddd4445bfa. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DENA51803987 — a six-check JSON result.
Drei Nüsse für Aschenbrödel (Arr. by Andreas Gilomen)
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1287c84bb69fdc13be8748a1e2e4c5ac34730d4a2898af692a721fda84ce9967. 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/DENA51803994 — a six-check JSON result.
Mozart, Lachner, Franck, Svendsen, Widor, Karg-Elert, Martin & George: Works for Flute & Organ
Prelude for Flute & Organ, Op. 18 - Transcription by Eric Fenby
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The Essential Slovak State Philharmonic Orchestra
La Malle-Post: La Malle-Post, galop (Orch. C. Pollack) [Orch. C. Pollack]
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Orphée aux enfers: Can-can (Featured in "Peter's Friends")
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Orfeo ed Euridice: Dance of the Blessed Spirits
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Symphony No. 4 in E Major: I. Andante pesante - Più mosso - Allegro
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Symphony No. 4 in E Major: II. Scherzo. Allegro assai quasi presto
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c474aa75656882c11e5982ef741a062a9d7a31587bf4945bb2c0d0e884ad5e4. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEB201923803 — a six-check JSON result.
Symphony No. 4 in E Major: IV. Finale. Andante - Allegro assai
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The 100 Best Classical Masterworks: Great Opera Moments
Tannhäuser: Pilgrim's Chorus "Beglückt darf nun dich"
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Schumann: Dichterliebe Op. 48, Liederkreis Op. 24
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Weihnachtslieder, Op. 8 : No. 1. Christbaum
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17942f8b707172f13ae33e9590098b2081f975df4abe9f8acb3bdb34be370381. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GBQG51800011 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14829803ec205daf34887f7cbeceaa902f497f5f16a131bbcdae94afae3aa875. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBQG51800012 — a six-check JSON result.
Flöte und Orgel (Rieger-Orgel in der Basilika der Abtei Marienstatt)
Soir dans les montagnes für Flöte und Klavier
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In the Twilight: Romantic Music for Soprano, Horn and Piano