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 0xc5d86570a4cc59e8c0ed78cb022e87ce1c57dae90c04f87f4b6fbc38aa002317. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b470c65c-fada-4576-83a8-c1fb66bc1323.json and https://artists.proofprofile.net/proofs/artist/b470c65c-fada-4576-83a8-c1fb66bc1323.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xed35d7d847797086e35354dba37aebeca3dc523fdda44f333b47b8c9883db9a8. 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/FRZ091601062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81356abac2278fc40f42099f023f32fabdac1b9f13e4f23521f74c828988049. 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/FRZ091601070.
Joie d'être chrétien : Pâques raconté et chanté aux enfants
Joie d'être chrétien : La Bible racontée et chantée aux enfants
Chantons en Église - Pèlerins d'espérance : Chants pour le Jubilé
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fcae92ba9d187ffa9a393af89aa401aed6219d115b9cd950ec0b97e5da10cd1. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:43:52Z), 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/FRZ092400522.
The City of Prague Philharmonic Orchestra
Chantons en Église : 33 chants de louange et d'adoration
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71aa65def09ce27cc2bf9a24523461dec237933af42e2a7c7d88d4c44c97fa9d. 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/FRZ091601069.