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 0xb7b66d9f45ceebf91b2d3887db98f569644a4432c7acf9cbb3e461d78ef97826. Chain 2 (Bitcoin): anchored in block 954063 (2026-06-17T07:49:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/464d860c-8016-4466-85cb-27d8ef0f700d.json and https://artists.proofprofile.net/proofs/artist/464d860c-8016-4466-85cb-27d8ef0f700d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Concerto in D Major for Trumpet, Strings & B.C.: II. Allegro
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 0x32c38d530a3a02348ec21b8f5763d1e78a2c782ac8df63478bbca291e55dc615. 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/NLY331011704.
Concerto in D Major for Trumpet, Violin, Strings & B.C.: II. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4968692b9aff4fafa8045cf3f38ad41c655e02e207ca34a815922edbe171a03a. 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/NLY331011707.
Ouverture in D Major for 2 Trumpets, Strings & B.C.: I. Ouverture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ebe966e0cd702ecf0916cec5f6b3f8e7eb550a91a4843a4d4a29a50847161a. 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/NLY331011749.
Trumpet Recital: Wagnermeyer, Franz - Telemann, G.P. / Bach, J.S. / Corelli, A. / Albinoni, T.G. / Purcell, H.