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 0x19c88b99236e2ccfeecb4343ca06374c26da3b991c348fd52ce6e51ed49edf9f. 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/55369a76-66d7-4989-93c8-89024b1f82fc.json and https://artists.proofprofile.net/proofs/artist/55369a76-66d7-4989-93c8-89024b1f82fc.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 0xdafdc7ca6dc2b4ec3892e840e2ba0e126500b1bde76cdaf6e7cced01f5ceccde. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZFZ32430490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d476c167f1b7f5ec102d6e37a67a9816cdd75690bb8ef698579a3a93ff086be. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T03:02:13Z), 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/QZPLS2444528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4806ed610bfa8f68267c4bc60400f3f1c8a642376102e183000da27731576fd2. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:40:41Z), 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/QZFZ32552456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2671a37d8dbecca98e46894d0d951f16a7ac6efdb6473cfcb9d08b4dcf0b3b7. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZHNB2523659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4318e998d8166ce863442449a2020bf30d11b894d06ebd7067bc48c2989728af. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:25:38Z), 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/QZK6K2537486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47943f69a6784e575cd1af6b6f4e7bdc0a0fe8beeddce4c0565a3aafb4faf5e9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMEM2593560.
Luxury Brands Made In China (S02) [EP04]