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 0x3a339b03b98d2424285670e0a86f8cdd229ecc653bd3896b6bbda12b9398e6f1. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e0baf2b-b4e8-42d8-b346-23f40166f46b.json and https://artists.proofprofile.net/proofs/artist/1e0baf2b-b4e8-42d8-b346-23f40166f46b.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 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 0x3335b0c25f5f20a04c2aa26faea5adcc6c551fdc7f8c2c73e41f515901d2fe8d. 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/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 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/FR7JM2203020.
Violin Concerto, Op. 15: III. Passacaglia. Andante lento (Un poco meno mosso) - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c5f47e95969ea21c3fe10cad570e4a6930b88ce7a12de75112417090c85935. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR7JM2203030.
Reveille, concert study for violin with piano accompaniment
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f96a40010918f5194ce1a6b41d283ab67da3ccdc101e3bf53b32250bdb2a94. 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/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: 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.
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.
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.
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 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/FR7JM2203110.