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 0x544fff8d9ddcf8035637a5003d29a637cd67169af0057ba052a3098364f52390. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53ef09bb-7356-4cbe-a0dc-99291a8d91cd.json and https://artists.proofprofile.net/proofs/artist/53ef09bb-7356-4cbe-a0dc-99291a8d91cd.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 0x772d5d4b5ac1301f12fc03a164fea163eafe0d53e239294c2264139cf16e3088. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NOUM70800241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836290ce97d7d715f673426b2b39b4e472117981ca582cb69e6f613a76c3b8dd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:25:01Z), 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/NOUM70801056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a055e360103ff8d45fec2787da6d4b7fe04c5b0c37b7c6a75d86158903888f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:49:37Z), 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/NOUM70801060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d518e7d2eb3430b292ec1c33f4bb031845389d0dec9a1a3b08d80aacd95f7c. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NOUM70801305.
No Ringes Jula Inn Igjen (Hjemme Hos Thomas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf75c4869cb5425bb3c0f69655e20d58c1c971359850d1b6f98c6a0100affe48. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NO2RW2503010.