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 0x57e062eb7dde8d10b2317e273fc316775d19b1b3e160975bcc3bf5401e8a3c08. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14551060-7286-4dae-8bc7-dea404dac0c9.json and https://artists.proofprofile.net/proofs/artist/14551060-7286-4dae-8bc7-dea404dac0c9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Serenade in C Major, K. 648 "A Very Little Night Music" (Version for 2 Violins, Cello & Harpsichord): VII. Finale. Allegro - World Premiere Recording
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 0xedb02df916a1cecdb215db872793f2a91517fbec6e110ebbdaf22cb6963fbb9e. 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/DEN962402267.
Serenade in C Major, K. 648 "A Very Little Night Music" (Version for 2 Violins, Cello & Harpsichord): I. Marche - World Premiere Recording
'A Very Little Night Music' and other works - Mozart
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a7a059e0d880e7e0d7a1317beb35c7258173c7ef5a30a63eb7ad95ecb01cb8. 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/DEN962402261.
Serenade in C Major, K. 648 "A Very Little Night Music" (Version for 2 Violins, Cello & Harpsichord): II. Allegro - World Premiere Recording
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58cab8b73f9bf7002dec2003d537fc29b4ba43fa2e6a255dfacca14945a1b7af. 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/DEN962402262.