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 0xabf01df5800b4b34a01bb40fb215c0483a90fbeab5f2a46ef31edb2454686b5f. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ff6ea68-4576-4f67-91e2-77f3570574fc.json and https://artists.proofprofile.net/proofs/artist/4ff6ea68-4576-4f67-91e2-77f3570574fc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Choro Air (Arr. After Orchestral Suite No. 3 in D Major, BWV 1068) - Arr. By Jan Doddema & Henrique Cazes
Bach in Brazil (Original Motion Picture Soundtrack) [Original Soundtrack]
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 0x6960515dc5fa3542a30e1f27fee05cc79f142001264b29ded2804dc66c83de90. 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/DES381605001.
Das Konzert der "Filhos de Bach" (Arr. After Cantatas BWV 144, BWV 140 & BWV 846) - Arr. By Jan Doddema & Henrique Cazes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19355924fcbbd6336954cc78f676c440c00ed3d54ca4e4c6152e9666f9e3a291. 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/DES381605015.
Ária Choro (Arr. After Orchestral Suite No. 3 In D Major, BWV 1068)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6960515dc5fa3542a30e1f27fee05cc79f142001264b29ded2804dc66c83de90. 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/DES381605001.
Abertura (Arioso From Harpsichord Concerto No. 5 In F Minor, BWV 1056, 1067 e 846)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebb09d12f4da2a6a809aeebef16e00bf2147603db6ddce6d1a770cc582653d2. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DES381605002.
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