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 0x69dbf904a7005c4120b6cbc85c7c047436a666042a50fd5d94e8fd32a8cf2a7b. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b07e2679-ddff-4050-8fb9-eb5861241664.json and https://artists.proofprofile.net/proofs/artist/b07e2679-ddff-4050-8fb9-eb5861241664.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cello Concerto in C Major, RV 398: 2. Largo
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 0x9927b25cc7aab2b8a2e6bc27446f3d98d7136dc1c6fb4b3fb84138757eef9f07. 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/DEF057700272.
Cello Concerto in C Major, RV 398: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace625e18a7ca06b420ca17ca8cfcccb44c5ea30bdd6a3c88379d82a4d530bd8. 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/DEF057700273.
Cello Concerto in C Major, RV 398: I. Allegro
"Concerto Barocco" - Vivaldi, Bach & Handel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740a9c42a94d4d1717f67596d80c16c356363b5b38eac86cd1e7789ac3e944b1. 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/DEF057700271.
Cello Concerto in C Major, RV 398: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9927b25cc7aab2b8a2e6bc27446f3d98d7136dc1c6fb4b3fb84138757eef9f07. 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/DEF057700272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace625e18a7ca06b420ca17ca8cfcccb44c5ea30bdd6a3c88379d82a4d530bd8. 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/DEF057700273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740a9c42a94d4d1717f67596d80c16c356363b5b38eac86cd1e7789ac3e944b1. 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/DEF057700271.