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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6e6972d045cb500cd28804cbc4dbc721ec20c6286f92cc08ba10f44f9380f7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d609c5a7-745b-417d-a944-321bcd6208e2.json and https://artists.proofprofile.net/proofs/artist/d609c5a7-745b-417d-a944-321bcd6208e2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bach-Reger: Transcriptions for Piano Duet (Brandenburg Concertos Nos. 1-6, Toccata and Fugue, Passacaglia & Prelude and Fuge)
Brandenburg Concerto No. 2 in F Major, BWV 1047: II. Andante - Transcribed for Piano Duet by Max Reger
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x503a167284b321695daa7c1b226ce25f7ea079e735dc7ffa85b2c9c051acd018. 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/DEE212344502.
Brandenburg Concerto No. 5 in D Major, BWV 1050: I. Allegro - Transcribed for Piano Duet by Max Reger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66069078d7e59d40572f37dda1c7ef82be55471dfca438ab02a44055393ebae4. 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/DEE212344504.
Brandenburg Concerto No. 6 in B-Flat Major, BWV 1051: I. Allegro non Tanto - Transcribed for Piano Duet by Max Reger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea80e848e46d0d394e932362df1ea60eb5ab0675af49db8049b6f46773c043b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEE212344516.
Brandenburg Concerto No. 1 in F Major, BWV 1046: I. Allegro - Transcribed for Piano Duet by Max Reger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b758b229184651d2f27de6052bcee0a3aa48b26165fbd7994aada7dc19945a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEE212344507.
Brandenburg Concerto No. 3 in G Major, BWV 1048: III. Allegro - Transcribed for Piano Duet by Max Reger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7030aef381c651cf24a988e723a7244fe19733255370401fb10cfde807e1d0a. 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/DEE212344520.
Brandenburg Concerto No. 1 in F Major, BWV 1046: IV. Menuetto - Trio I - Polacca - Trio II - Transcribed for Piano Duet by Max Reger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6fbee910dfd36179a0194f36a29ca26eb792fb6e53a7b1d238cda0c8c061f8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEE212344510.
Brandenburg Concerto No. 2 in F Major, BWV 1047: I. Allegro - Transcribed for Piano Duet by Max Reger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb771c797e239eceb1a8598579a3bb92e7bb0ebd429328fa63399c472c95eb8c. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DEE212344501.
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
Toccata and Fugue in D Minor, BWV 565 - Transcribed for Piano Duet by Max Reger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7374a7bd6ff7f0bcc5f18091ebe080f290bd5f8a9ea5a285e1908fa48365a1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE212344512.
Brandenburg Concerto No. 4 in G Major, BWV 1049: I. Allegro - Transcribed for Piano Duet by Max Reger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18040bba8b85aefd257ac88ece0b53e72d3fba0e40173e7ee831fdda4aaf4528. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEE212344513.
Brandenburg Concerto No. 4 in G Major, BWV 1049: III. Presto - Transcribed for Piano Duet by Max Reger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d0c7f95f3c4c504fd021b756c971e6d1333c6f3803690e9e6228b983b072ee. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/DEE212344515.
Brandenburg Concerto No. 5 in D Major, BWV 1050: III. Allegro - Transcribed for Piano Duet by Max Reger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe7e8d0200dffdd4d3cd5a21da06b537ba8386b0dcabda1b7bc50d1a8bf841c. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEE212344506.
Brandenburg Concerto No. 6 in B-Flat Major, BWV 1051: III. Allegro - Transcribed for Piano Duet by Max Reger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4daefc9b041f340254beea5599e80f6cb9e7efcc6227bba7f90a04f6dd2d9bf. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/DEE212344518.
Brandenburg Concerto No. 1 in F Major, BWV 1046: II. Adagio - Transcribed for Piano Duet by Max Reger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9f2079a0d52a5517511cfd3f66793821cd54d679391a19c0cb6428db41612d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEE212344508.
Brandenburg Concerto No. 3 in G Major, BWV 1048: I. Allegro con spirito - II. Adagio - Transcribed for Piano Duet by Max Reger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e24a65460527217ef1f31e40fee1e2574bf2e349cbc87d4a72825515e91126. 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/DEE212344519.
Brandenburg Concerto No. 1 in F Major, BWV 1046: III. Allegro - Transcribed for Piano Duet by Max Reger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc103b0385f3e43b6f7742c315c337892d5553b64a73468d34b5cae0cc830cf54. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE212344509.
Prelude and Fugue in E-Flat Major, BWV 552: I. Prelude - Transcribed for Piano Duet by Max Reger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b96d58934919d0d632a56d7d519caa81671fc96443f1060142dc4c97cb86eeb. 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/DEE212344521.
Passacaglia in C Minor, BWV 582 - Transcribed for Piano Duet by Max Reger
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bd1eeba254e02dc628a6028bc8cf78563f2782fcaa1aee9c8dc074bf84539f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEE212344511.
Allusions and Beyond (Transcriptions and Transformations for Piano Duo)
Transcriptions and Beyond (Works and Transcriptions for Piano Duo)
Originals and Beyond (Original Transcriptions for Piano Duo)
Symphony No. 2 in C Major, Op. 61: III. Langsam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194eff400b535d0a7a97e013161337d67e79bd8db71d5243e147b7257d49b919. 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/DEE219770609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf904a39afddd0d1d847142b23e5e8d5bd8261f00f8dacb28f2b50080a8414f09. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/DEE219770606.