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 0x2aacd07765aa79cd7b009c231c85cbfa27e20d819433d2912f616af976b10a5c. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbe59f1f-6868-4332-8188-47aa17e7be37.json and https://artists.proofprofile.net/proofs/artist/fbe59f1f-6868-4332-8188-47aa17e7be37.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Suite No. 1 in G Major for Solo Cello, BWV 1007: I. Prelude
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 0x91772c41eb7d6bc655c836738fd2741d11eb901c3645aa776df5ddaad51ba059. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL9768801.
Orchestral Suite No. 2 in B Minor, BWV 1067: VII. Badinerie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae8aa9609c67915cca1c01144ab9dcfb00edbc99eefba78e39f3c2e0183a586. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB790401222.
100 Pieces of Classical Music For Your Brain
Symphony No. 25 in G Minor, K. 183: I. Allegro con brio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c870f0f7d7b156a189f0e3df5fa9eb489b54863926948c39b5cbb6ae2820ca. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL0508406.
Concerto in A Minor for Piano and Orchestra, Op. 16: I. Allegro molto moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b93d1626e4fa30f2149a9a8cf00c0013a3d9a190b25fe22e8e4e6db8410498e. 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/SEWDL0778801.
String Quartet No. 62 in C Major, Op. 76:3, "Emperor": II. Poco adagio: Cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535b103a192b06b9640e6dce8f5c189633771ae41ed36d201c5676a8038f356c. 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/DEB790303086.
Waltz No. 1 in D-Flat Major, Op. 64, "Minute Waltz"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8609c41eed23568ed8b979ce104241dc3030d8b7a92e1f79dbd45cd7c85d4b09. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018041.
Concerto in D Major for Violin and Orchestra, Op. 77: III. Allegro giocoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd451e91dd9028d9a95b701ea7bb46d93be9629d51730cc54dd3ca879b654462a. 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/SEWDL0747803.
Festival Overture in E-Flat Major, "The Year 1812", Op. 49
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cdccfd489c05d6124496e21997632557322d4ab59cf73f9acd65f6ad4fbc05. 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/DEB790317215.
Symphony No. 3 in D Minor, "The Wagner": II. Adagio, Etwas bewegt, quasi Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6e776c99e4194319057957bc436465c2185c56def7a753f2e717f370f72f9d. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/SEWDL9400706.
Prince Igor, Polovtsian Dances: I. Introduction - Andantino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eddd13571441188e58db225bdecb44dd610220f1579177cf8f1d9ae6f2a7ae4. 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/DEB790300544.
Piano Sonata in A major, K. 331 - III. Finale - Rondo a la Turka
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb03b4747681c15fcf865b14d7649857ea5269440408d36b825ad40b20438eb. 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/DEB790300552.
12 Études, Op. 10: No. 12 in C Minor, "Revolutionary": Allegro con fuoco
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fdcc031e2154eca3ea7ce74dcd86e206e80e33202f9ca782c2b34377e60e340. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:00:45Z), 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/SEWDL0519310.
Concerto No. 1 in E-Flat Major for Piano and Orchestra, S. 124: II. Quasi adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770638940e24a89b9f58b95352816920236d6a9ad304a7da26df26a93f917589. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-21T17:26:46Z), 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/SEWDL0715507.
Slåtter (Norwegian Peasant Dances), Op. 72: Bruremarsch fra Telemarken (Bridal March from Telemark)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5170f0ba354e88ec8deb3df926374891da5ca194e1e44a39579cce6bf506a0. 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/SEWDL0709209.
Concerto in E-Flat Major for Trumpet and Orchestra, Hob. VIIe: III. Finale: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45351393c467a6f529f00d0706ae4514fe51a773f71ce47d340ef06395465822. 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/SEWDL0758806.
Tragic Overture in D Minor, Op. 81: Allegro ma non troppo - Molto più moderato - Tempo primo ma tranquillo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146bf3c6d628a7fe20a15ea989158321a6b802149434d949cf082d611f4bdd23. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/SEWDL0718704.
Symphony No. 5 in B-Flat Major, D. 485: II. Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d546825df417001e0b88109f079a9fcf2781c0b3f55bc54e53c11a79f1ce79b. 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/DEB790301058.
Green Edition - Bach: Brandenburg Concerto No. 1 & The Art of the Fugue, BWV 1080
Green Edition - Bach: Brandenburg Concertos Nos. 3 & 4
Johann Sebastian Bach - Famous Organ Works Vol. 1
Grey Edition - Bach: Fantasia, BWV 572 & Organ Sonata No. 4, BWV 528 "Trio Sonata"
Grey Edition - Bach: Fantasia, BWV 572 & Organ Sonata No. 4, BWV 528
Grey Edition - Bach: Toccatas, BWV 913-916 & Toccata and Fugue "Dorian"
Grey Edition - Bach: Toccata und Fugue, BWV 538 "Dorian" & 18 Corale Preludes, Nos. 3, 9 & 14
Johann Sebastian Bach: Famous Organ Works
Yellow Edition - Bach: Violin Concerto No. 1, BWV 1041 & Brandenburg Concerto No. 4
Yellow Edition - Bach: Italian Concerto, BWV 971 & Double Concerto for 2 Violins and Orchestra
Yellow Edition - Bach: Chromatic Fantasia and Fugue & Brandenburg Concerto No. 4
Yellow Edition - Bach: 18 Chorale Preludes No. 3, 9, 14 & Italian Concerto, BWV 971
Orange Edition - Bach: Toccata and Fugue "Dorian" & Choral works
Orange Edition - Bach: Prelude and Fugue, BWV 547 & Choral works
Orange Edition - Bach: Jesu, meine Freude, BWV 227 & Chorale Preludes Nos. 3, 9, 14
Orange Edition - Bach: Fantasia, BWV 572 & Organ Sonata No. 4, BWV 528
Green Edition - Bach: The Art of the Fugue, BWV 1080
Blue Edition - Bach: Prelude and Fugue, BWV 547 & 548
Blue Edition - Bach: Prelude and Fugue "Wedge" & Organ Sonata No. 4 "Trio Sonata"
Blue Edition - Bach: 18 Chorale Preludes & "Trio Sonata", BWV 528
Blue Edition - Bach: "Dorian", BWV 538 & Toccata and Fugue, BWV 565
Green Edition - Bach: Organ Sonata No. 4 "Trio Sonata" & Fantasia, BWV 572
Green Edition - Bach: Fantasia, BWV 572 & Toccata, BWV 916
Green Edition - Bach: Brandenburg Concertos Nos. 5 & 6
The Classical Collection - J. S. Bach - Obras maestras
Red Edition - Bach: Orchestral Suites Nos. 2 & 3
Red Edition - Bach: "Trio Sonata", BWV 528 & Orchestral Suite No. 1, BWV 1066
Red Edition - Bach: "Trio Sonata" & Orchestral Suites Nos. 2 & 3
Red Edition - Bach: "Dorian" BWV 538 & Orchestral Suite No. 1, BWV 1066