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 0xb54befc309b59c31daa6cb082a487912a6610fc94f9f89e6504a382dbfae24a4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0de059c-f5f3-4d48-823a-8de041602e48.json and https://artists.proofprofile.net/proofs/artist/b0de059c-f5f3-4d48-823a-8de041602e48.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
7 Canciones populares espanolas (arr. P. Kochanski for violin and piano): Asturiana
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 0x40046447811f546926439708f2374342b4d1bd98bf5b0cba743aac70fe568e99. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/HKI199791503.
12 Bagatelles, Op. 13: No. 9. L'abeille (The Bee)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97f252c48df1ab5a03ada26471ba8277db94dbf433179e47b7300ba101443b5. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:07:03Z), 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/HKI199791512.
Schwanengesang, D. 957: No. 4. Standchen (Leise flehen meine Lieder)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb187ff2a5dd34b4666d010a6d0a82b0d48601cf5809bfbd9309167e3eed68a3. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/HKI199791514.
CHEN / HE: Butterfly Lovers Violin Concerto (The) - Lu Siqing
Chen / He: The Butterfly Lovers Violin Concerto - Lu Siqing
The Four Seasons: Violin Concerto in E Major, Op. 8, No. 1, Rv 269 "La Primavera" (Spring): I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a38d778d8cedb2c85829ab095b4a535440fd9061d5d52a6ae8b89ed83e26ac. 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/HKI190022402.
The Four Seasons: Violin Concerto in G Minor, Op. 8, No. 2, Rv 315 "L'estate" (Summer): I. Allegro Non Moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0e7862c26c91d010e0fcbb9012b9283c33f947de54217346c1aebacd5e62c5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HKI190022404.
The Butterfly Lovers' Violin Concerto (Arr. for Violin & Chinese Orchestra): Adagio cantabile "Falling in Love"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69955f5db37399b26e52b82885d88ce3c269a8025eb8cd16580e16e95f2308b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SEAEW1404070.