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 0xbe2266cbb1c1935555ee29a0449a97cd5be048f89b2af203d32dbead378a996f. Chain 2 (Bitcoin): anchored in block 954015 (2026-06-16T22:55:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3496ce61-c55b-4a6c-9c32-29e8b5f5f88e.json and https://artists.proofprofile.net/proofs/artist/3496ce61-c55b-4a6c-9c32-29e8b5f5f88e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Musique de table, Part II: Concerto for 3 Violins in F Major, TWV 53:F1: I. Allegro
Telemann: Recorder Suite in A minor - Viola Concerto - Tafelmusik: 2 Concerti
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 0x46f5cfaaadc48024f9d89a710c9344e1858bea21b7f3fac63bec533ccb854cd3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HKI199319113.
Musique de table, Part II: Concerto for 3 Violins in F Major, TWV 53:F1: III. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9577cafdf55251964b71fbb100fc5a9d4c393232555c57b4d47e634438ad79e0. 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/HKI199319115.
Musique de table, Part II: Concerto for 3 Violins in F Major, TWV 53:F1: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60373d17c09a1e0d537c15594dd9b76ec4fc44fae78899b9c6a62449b995990f. 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/HKI199319114.