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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c7265578ea724235b77f18e68e5f1b682aa57a3c2076952d378b6f0c3a3b9a. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15f594b9-4091-4891-805c-363df2d0444a.json and https://artists.proofprofile.net/proofs/artist/15f594b9-4091-4891-805c-363df2d0444a.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 Orchestra): III. Menuet [I] – Trio
Mozart: Serenade in C Major, K. 648 "A Very Little Night Music" (Version for Orchestra) [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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3efdf3a7e35f351a6976b54d3cfa6d585b1a5e4ef2f084d4bc2a1066772add0. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEN962402363.
Serenade in C Major, K. 648 "A Very Little Night Music" (Version for Orchestra): VI. Menuet [II] – Trio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dc2cf5d3f893d56b1df74266f6298327dd5dc57d326571bb2eeba1d628584d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEN962402366.
Serenade in C Major, K. 648 "A Very Little Night Music" (Version for Orchestra): III. Menuet [I] – Trio - World Premiere Recording
"A Journey through Classical Dances" - Mozart, Beethoven, Chopin & more
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3efdf3a7e35f351a6976b54d3cfa6d585b1a5e4ef2f084d4bc2a1066772add0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEN962402363.