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 0x15abd1c50b559307163960b9ddbdf5da72d57c98536dfb059db8a2610237d483. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b26211f-9e0e-48e1-b046-b5bb8f5b97e3.json and https://artists.proofprofile.net/proofs/artist/5b26211f-9e0e-48e1-b046-b5bb8f5b97e3.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 0x671fd4472dd2af3dfe40b9e04ea540f9c3df9aa4986cef031f5135e89d17cec4. 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/QZNJX2485152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c70b888bc3fb99ef644bf4a5b2445083ddc5752736332236671c9c6ca94df9. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:39:42Z), 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/US7VG2593091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fb76eec8bbaaaa521e99dacbc75d8fbb66d3dbb4e84500a6c2e2febbb03a30. 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/QZMZ92520146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f46ed5fadd369445ae41b358111ca6241052bc71df83f4a3d8227afdf644a4. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:24:29Z), 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/QZNJW2569434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02020c85a9cef531d08c919e6929136a3838e7a80cbfcc9d3d8d8146b133a9a7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNJZ2519950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a547cbc74dfd9078fa8da2b29c94e9ecf32c163156cc4fbfa54e236455aee67. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZNJZ2519951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcad295eac7a1c30075547ddd8635204f07fdd01fabaa513fea116b7018905e75. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZTPX2504337.