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 0x8427dbedee9118f1f21ccf133524a54e37592d3f5e65f9e053dea53d7f188efe. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/207b89c3-3025-4461-917f-769313b73539.json and https://artists.proofprofile.net/proofs/artist/207b89c3-3025-4461-917f-769313b73539.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lost And Found - Oboenkonzerte des 18. Jahrhunderts von Hoffmeister, Lebrun, Fiala und Koželuh
Concerto for Oboe and Orchestra in C Major: I. Allegro con brio
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 0x7f2d420772bae8e7ce4554860473a496d2bb103a827d88df21f8eecb7ccc191b. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DEN961304101.
Concerto for English Horn and Orchestra in C Major: II. Adagio cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ab34d366ff0cac7dce92640e83f4cff831bb17708fea0bb8c689e381759943c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEN961304122.
Weinberg: Wir gratulieren!, Op. 111 (Live)
Clarinet Concerto No. 7 in E Flat Major (Darmstädter No. 1): 3. Rondeau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bf7ebcfd4b8bacb30f449cab93c2967bab253f426e793acd86d418e4d9b521. 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/GBF071602503.
Beethoven: Symphony No. 9 in D Minor, Op. 125 "Choral"
Beethoven: Symphony No. 4 in B-Flat Major, Op. 60
Beethoven: Symphony No. 3 in E-Flat Major, Op. 55 "Eroica"
Weber, Crusell & Berg: Bassoon Concertos
Beethoven: Symphony No. 6 in F Major, Op. 68 "Pastoral"
Beethoven: Symphony No. 5 in C Minor, Op. 67
Beethoven: Symphony No. 7 in A Major, Op. 92
Beethoven: Symphony No. 2 in D Major, Op. 36
Symphony No. 41 in C Major, K. 551, "Jupiter": II. Andante cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3e0aa9d63762ac49e15b55663225f307d98387a780504da311c2b953e27c5c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEE862100860.
Mendelssohn: Symphony No. 2, "Lobgesang"
Bach, CPE: Flute Concerto in A Minor, Wq. 166: I. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915fee0f06b443cb13835691bcc771384d0a715dad7b6bdae8e4baa9108f9a67. 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/GBAYC1503844.
Bach, CPE: Flute Concerto in A Minor, Wq. 166: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71392737c4a9842c5049a4e34c71ad4caafd8e9bf89e85f1806345caf2641ff8. 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/GBAYC1503845.
Bach, CPE: Flute Concerto in A Minor, Wq. 166: III. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c426cc3d4874fa94e150b479604a7c4b2e60f38c826c2c583807706e4e65aeb. 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/GBAYC1503846.
Bach, CPE: Flute Concerto in G Major, Wq. 169: I. Allegro di molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504383ed7e3846d8a92dead52ebce0dc2ffc84372904ea552b3094301c833e29. 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/GBAYC1503847.
Bach, CPE: Flute Concerto in G Major, Wq. 169: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9bde56ede0f053d8a9e5d9e33a4b273a651bfab255338b2effe1132ad8c4d8. 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/GBAYC1503848.
Bach, CPE: Flute Concerto in G Major, Wq. 169: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc36b417671300712a92c9a6377c00b55669cbe663e468a9920d59e57dc338188. 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/GBAYC1503849.
Bach, CPE: Flute Concerto in D Minor: I. Allegro (After Harpsichord Concerto, Wq. 22)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af061fbf478f2aac7b20b7a9c642ee2f838850e788de25e0558c2b2befe6573. 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/GBAYC1503850.
Bach, CPE: Flute Concerto in D Minor: II. Un poco andante (After Harpsichord Concerto, Wq. 22)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de5bbd6df1e4df0a6ca416f998740037deb8ad7647303595b1e0ce9097a6efa. 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/GBAYC1503851.
Bach, CPE: Flute Concerto in D Minor: III. Allegro di molto (After Harpsichord Concerto, Wq. 22)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20dd8fc83da29193874a4823af5db6234fa1551a7842c6e254d0acd7b8e6b3f. 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/GBAYC1503852.
Symphony No. 4 in A Major, Op. 90, "Italian": II. Andante con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee47aa8d9672c976f52eb4bea958ceb90985d46e25c876aed2418b7b21a5b003. 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/DEE861600446.
Schubert: Symphonies Nos. 1 & 10 (Fragment)
Vivaldi, Jacob, Françaix & C.P.E. Bach: Bassoon Concertos (Movimentos Edition)
Symphony No. 3 in D Major, D. 200: II. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13258d3bcc17bfb5d7898e9f7cc4bc03c38e93dca0c573aa90dac471226ba5fa. 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/DEE861200126.
J.S. Bach, Telemann & C.P.E. Bach: Oboe Concertos (Movimentos Edition)
Concerto for 2 Oboes, Bassoon and B.c. (after BWV 42 & BWV 249)a: III. Ohne Bezeichnung
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6180fc03c91cd6e2f208b57115705ce701f466a85a1a9850b975bdfb333fa494. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEE860900487.
Beethoven: Symphony No. 8 in F Major, Op. 93
Mozart: Le nozze di Figaro, K.492, Act III: Aria. "Dove sono i bei momenti"
Mozart: Don Giovanni, K.527, Act II: Aria. "Mi tradì quest"alma ingrata"
Beethoven: Symphony No. 1 in C Major, Op. 21
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3e0aa9d63762ac49e15b55663225f307d98387a780504da311c2b953e27c5c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEE862100860.