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 0x4da6513b7b18c942500c88c4b569db8a67d94fad92598b43ad3da936442f2654. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e56f379-cf13-483c-a653-f5824b7fa032.json and https://artists.proofprofile.net/proofs/artist/4e56f379-cf13-483c-a653-f5824b7fa032.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Concerto-Sonata in D Major for Trumpet, Strings and Harpsichord: I. Moderato e grazioso
Viviani / Vivaldi / Telemann / Handel / Joseph & Michael Haydn: Trumpet Concertos
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 0x2863227b2ce7a39d1ae1f41d5f09192f3572aa631e4e572b7dcfdd26b0bf41d8. 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/DEF057600271.
Concerto for 2 Trumpets, Strings & Continuo in C Major, RV 537: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ddb5030df703f57d9cbc78ed879cdcb00772e0d1db03ce914a06d3a22938c9. 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/DEF057600232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2863227b2ce7a39d1ae1f41d5f09192f3572aa631e4e572b7dcfdd26b0bf41d8. 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/DEF057600271.
Concerto-Sonata in D Major for Trumpet, Strings and Harpsichord: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a177d7c9bdb062116c6df1a259d860b4e0825e9934ef0cb8fd64ab9a41a1f87. 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/DEF057600272.
Concerto-Sonata in D Major for Trumpet, Strings and Harpsichord: III. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec13b6d8e94525cec9866518270fa3f0f209d24e0a889825a96a85fe5fbccbf2. 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/DEF057600273.