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 0x470d94cc311f85ade26be7c21bb651e48b339b4c7bc6b32a312cad6ef2f5d414. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a64d806c-9294-470a-afd2-ff4517dbcd6a.json and https://artists.proofprofile.net/proofs/artist/a64d806c-9294-470a-afd2-ff4517dbcd6a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tchaikovsky: Overture "1812"; Marche slave / Borodin: In the Steppes; Polovtsian Dances / Rimsky-Korsakov: Russian Easter; Capriccio
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 0xf6275c4fe838fc9731859a8762ec17beb7fef2ff1ee568e74c0a143b14b50be0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEF058902870.
Slavonic March, Op. 31: Moderato in modo di marcia funebre - Andante molto maestoso - Allegro risoluto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bae8fa9f39a5705dfa33c87348e22f9b730ed5196af2def7b7d9ab2a26be4f. 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/DEF058902880.
Eine Steppenskizze aus Mittelasien: Allegretto con moto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04a41e11ba4a64160389e1594f04770da906f28dd28fa2a95ef9d6b788cf115. 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/DEF058902890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577c4e672617201650a2f5da129440de907b689433a3b85858cb81b7577c3ce4. 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/DEF058902900.
Russian Easter Festival, Overture, Op. 36
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329be9664229263942fbdfa2f92c758f66d4fe4617497f6a351fa9e886181516. 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/DEF058702910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d74ccf6e5598e5c3b4a520e9a40be83c985b2ee513a72a8c4256125eb609c23. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEF058702920.
Overture 1812, Op. 49: Overture 1812 - Beginning
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653c3b0b8013277b5bba80811e4a736bf1e6be9ffd08830e6b024a554828ed40. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEF058902872.