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 0xc56e3e376b440fd993d09a73c47d3e4175990a430791376cc7984dc80f958cb4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f20d69b-5b1c-4397-bae2-2b142f6cbfca.json and https://artists.proofprofile.net/proofs/artist/9f20d69b-5b1c-4397-bae2-2b142f6cbfca.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozart: Sinfonia concertante for Oboe, Clarinet, Horn and Bassoon in E-Flat Major, K. 297b: I. Allegro
Mozart: Clarinet Concerto in A Major, K. 622 & Sinfonia concertante in E-Flat Major, K.297b
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 0x72fe3856d8ea666b1a198a61a5d19ab1735099f372500e5ecfa4576b408459b9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEA349000919.
Mozart: Sinfonia concertante for Oboe, Clarinet, Horn and Bassoon in E-Flat Major, K. 297b: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6978ef36cde4554d5c8665e79847fd9415afcc2c8bab2545b82f620b10bdbc9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEA349000920.
Mozart: Sinfonia concertante for Oboe, Clarinet, Horn and Bassoon in E-Flat Major, K. 297b: III. Andantino con variazioni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b2934ef60ca3bf2e03568fe6a6bbbb5f61b7361e063331f9373c190c750237. 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/DEA349000921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fe3856d8ea666b1a198a61a5d19ab1735099f372500e5ecfa4576b408459b9. 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/DEA349000919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6978ef36cde4554d5c8665e79847fd9415afcc2c8bab2545b82f620b10bdbc9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEA349000920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b2934ef60ca3bf2e03568fe6a6bbbb5f61b7361e063331f9373c190c750237. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-21T16:31:22Z), 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/DEA349000921.