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 0xb5e58353b0a31434b354f88287b92e3986793c050e3b41e45edf162ccce4defb. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96e1b696-3174-49c0-9900-72156e14ef85.json and https://artists.proofprofile.net/proofs/artist/96e1b696-3174-49c0-9900-72156e14ef85.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Concerto for 4 Harpsichords, Strings, and Continuo in A Minor, BWV 1065: III. Allegro
Bach, J.S.: Air & Badinerie - Orchestral Suites
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 0x557a5322bbb0a4f0292fed032c656c57236d4d31393c5e6059197db1d4b49043. 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/DEF057203013.
Concerto for 4 Harpsichords, Strings, and Continuo in A Minor, BWV 1065: II. Largo
Bach: Harpsichord Concertos BWV 1052- 1058 & 1060-1065
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c89c69665e6a45a18853ec9885440f12adf8bc4c193f7cc3c9891085eb0597a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEF057203012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557a5322bbb0a4f0292fed032c656c57236d4d31393c5e6059197db1d4b49043. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEF057203013.
Wir entdecken Komponisten: Johann Sebastian Bach – Brandenburgische Konzerte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab644fcad05cb7329864f9ff1f252a3c5fb4c2b4024636e4b06e4331434d098. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEF058530801.
Bach: Orchestral Suite No.2 In B Minor BWV 1067
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c89c69665e6a45a18853ec9885440f12adf8bc4c193f7cc3c9891085eb0597a. 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/DEF057203012.