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 0xb64fa7f470126bef4341024beb76f19401b1fe56b8a52256a76c3f178a121f83. 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/4269c4b5-607e-420c-9c42-f1a61b84dc54.json and https://artists.proofprofile.net/proofs/artist/4269c4b5-607e-420c-9c42-f1a61b84dc54.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Violin Concerto, Op. 15: I. Moderato con moto – Agitato – Tempo primo - Live
Symphonieorchester des Bayerischen Rundfunks
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 0x3335b0c25f5f20a04c2aa26faea5adcc6c551fdc7f8c2c73e41f515901d2fe8d. 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/FR7JM2203010.
Violin Concerto, Op. 15: II. Vivace – Animando – Largamente – Cadenza - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7005c25d72ab274f250011bcf5c5957941cb8e791fde4ee41d5f5584a08749e9. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR7JM2203020.
Reveille, concert study for violin with piano accompaniment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f96a40010918f5194ce1a6b41d283ab67da3ccdc101e3bf53b32250bdb2a94. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR7JM2203040.
Suite for Violin and Piano, Op. 6: Introduction
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2feb2d6f9bfae922c95972ada91ef75c64e7e2e393ba3e2f0eacc47a309f55ea. 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/FR7JM2203050.
Suite for Violin and Piano, Op. 6: II. Moto perpetuo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3564a5148866382dbaf9cd218d203796d20e4c95d5355166b226e9202d44801e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR7JM2203070.
Two Pieces for violin, viola and piano: II. Allegro con molto moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f066280a9ce7a9ff5600731c182c098221037109ad1b0b6b627020c5974448. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR7JM2203110.
Suite for Violin and Piano, Op. 6: I. March
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x337e4ebde5c36b9b2438e7b6ca2306b9213aa229b2d2568a786dfc5a3f04b74a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR7JM2203060.
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
Suite for Violin and Piano, Op. 6: III. Lullaby
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e37bf9e13f4eecf06a123884d168b1edbb4c0131776b48a56c56096d2c6376. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR7JM2203080.
Suite for Violin and Piano, Op. 6: IV. Waltz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94f00abf0ec7c24e6f6417bed7f563f85ebbe5511516e46a8273a7bf42a52f4. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FR7JM2203090.
Two Pieces for violin, viola and piano: I. Un poco andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df335e424370d1d6bb3034cb7316b05cab0b99e1d4600b72d2497b215d49192. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FR7JM2203100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efc524f43be207b7e441393d08a534865bcdcc12818165e3eb83e7ec9d003cf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR50X2304302.
Symphony in D Major, H. 663: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241de0622ed928aba989213f7e9d553b86a25c427ba9773fcefc63f66cc7b6f6. 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/FR50X2304303.
Concerto for Harpsichord and Fortepiano in E-Flat Major, H. 479: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755a21db4a7904fba79c88bcac18b7112d0038ab202d5304c4a1921122b10794. 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/FR50X2304306.
Divertimento in F Major, K. 138: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea4718ec273d03fb03493f4ded13c846ad235db5294bed8ded00e6654cd8db1. 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/FR50X2304309.
Piano Concerto No. 17 in G Major, K. 453: III. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4979b83f84d00444114d5e5a2d454a9abc3b1d01f4e893cedfcf9d63fb62598e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR50X2304312.
Concerto for Harpsichord and Fortepiano in E-Flat Major, H. 479: I. Allegro di molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc64fd1f3e30719ecc7edb4f1e1e988d08e4dbd3501e6f5ce08987230d68a2638. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/FR50X2304304.
Concerto for Harpsichord and Fortepiano in E-Flat Major, H. 479: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0ff7e8791b277a24caf93a8265a46ddb08c4fbcd65ad510d4097528abae7873. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR50X2304305.
Piano Concerto No. 17 in G Major, K. 453: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641e0f3a230144392d1a4cf072e7e5628ce2cb3fc0b95eec323e6c07255e46c5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X2304310.
Piano Concerto No. 17 in G Major, K. 453: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc189f96b526db96798127b6038d03659d801672405a85e02a5015e6336bf2ebc. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FR50X2304311.
Piano Quartet in E-Flat Major, Op. 47: I. Sostenuto assai - Allegro ma non troppo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6ba81681e087524b92416c16277878707b4d6eeedcf1d404877b7421ae958c. 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/FR7JM2160010.
Piano Quartet in E-Flat Major, Op. 47: II. Scherzo. Molto vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174147e393d77e454b27dde1bbbdd10fc559bcd88366370c3c657311a2f17882. 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/FR7JM2160020.
Piano Quartet in E-Flat Major, Op. 47: III. Andante cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4e01befe7baf42e4e8b8b8a952d9cf703af1a3f5983c8f718d7a4f78381d2e9. 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/FR7JM2160030.