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 0x7a4b5eba01069b77694d4d5bed2dececd38ad23996317ddfd8baf65d5ff4ace5. 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/63cb9fbc-a55e-4381-b56d-a1b5c51e001d.json and https://artists.proofprofile.net/proofs/artist/63cb9fbc-a55e-4381-b56d-a1b5c51e001d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Amazing Duo I: The Berlin Philharmonic Duo
Amazing Duo II: The Berlin Philharmonic Duo
Original Works & Classics for Cello & Double Bass (APEX)
Boccherini / Arr Stoll : Sonata No.3 in G major : III Minuetto
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 0xe10d729dc4bbffcd0ed67429b09f7caadb939aa11094ddf0b5e0ba47f2009255. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEA808408803.
Haydn, Michael / Arr Stoll : Polonaise in C major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a82a3d526f2abe39201820da267e08cb5254ea6715958f2cf95d25a9cf881cd. 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/DEA808000057.
Kraft : Sonata No.1 in B flat major : II Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a104382c60f48adda0a7d36dcb4282f0212b9a863659270d1a522e151860d5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEA808408502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10d729dc4bbffcd0ed67429b09f7caadb939aa11094ddf0b5e0ba47f2009255. 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/DEA808408803.