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 0x0f410ad73ad2f7a270a83e6ce2891e9aaee45825566d9f8193d4a54ea8c9f178. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c37ed140-b686-41f5-8c6b-8adbcb2eb815.json and https://artists.proofprofile.net/proofs/artist/c37ed140-b686-41f5-8c6b-8adbcb2eb815.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Brandenburg Concerto No. 3 in G Major, BWV 1048: I. (Allegro) - Live from Teatro Romolo Valli, Reggio Emilia, 2007
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 0x7cb27a6ed7e0b7748b81d21b967425f6f850264d6befaa6c1bfbf0de048c4e6b. 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/DEN960702021.
Brandenburg Concerto No. 6 in B-Flat Major, BWV 1051: III. Allegro - Live from Teatro Romolo Valli, Reggio Emilia, 2007
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cbf8269fa84659e5f7c84554458543a1e4a43ac4894a7cb0cb59ba6207595c. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DEN960702043.
Brandenburg Concerto No. 3 in G Major, BWV 1048: III. Allegro - Live from Teatro Romolo Valli, Reggio Emilia, 2007
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962754d7cfef2edf56d53559c2b2c329c960a12ad5fc985e1b3bd397f8e01575. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:56:37Z), 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/DEN960702023.
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
Brandenburg Concerto No. 6 in B-Flat Major, BWV 1051: I. (Allegro) - Live from Teatro Romolo Valli, Reggio Emilia, 2007
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aaa74bf5aebd37c0742060716ea3b91f1a41be1a5a796971ad471dcf3298978. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:01:10Z), 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/DEN960702041.
Brandenburg Concerto No. 6 in B-Flat Major, BWV 1051: II. Adagio ma non tanto - Live from Teatro Romolo Valli, Reggio Emilia, 2007
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0966a63d637f5c1278157d7a6d7899d41620cb9019cda299298fb6eefe180573. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DEN960702042.