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 0x3c157e6bc6f01c67fd5f795b674fed8692682f475948181d44459c23f92b2617. Chain 2 (Bitcoin): anchored in block 953928 (2026-06-16T10:21:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d2b3268-02c9-4134-a29b-1397064e1db3.json and https://artists.proofprofile.net/proofs/artist/1d2b3268-02c9-4134-a29b-1397064e1db3.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 0xc46f28e5c696c4196219486a9d1d7119b3140f903499d572238715f10f1e5a91. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZHN72055107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52a068beb74bd0eb649ba7c0eab46e98228877ab27568a511d16c70a2461675. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:22:38Z), 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/QZHN72055108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14ca1f1dc549f48dc8603ac5a753475259af2aee7f157ec2f2f4c72a4014565. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZHN72055109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf34f6c99f11ab78e4abeb8464a8658da3002e0ea784ff5bd8acaaded6d1a51a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:17:48Z), 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/QZHN72055110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d817a790691bcdef3d8019284e08e528fd07c8b27fe812ae913765e14b8d1cd. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:51:54Z), 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/QZHN72055111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91823c8249a4747ff43e4a90fa2e6d5049e1397a26cfefa0ecccca00eba80527. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:04:17Z), 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/QZHN72055112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf655c764e4d4dbbde7d24a81006da023f9bb709fbdb900e9bdc02ac8452f9e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZHN72055113.