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 0xe0afecccc0b04013b29731c0e1bde47870f3cd419098ea6de64761f3d233816f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4a96c71-cebb-4b06-8783-b6bb36a1a396.json and https://artists.proofprofile.net/proofs/artist/b4a96c71-cebb-4b06-8783-b6bb36a1a396.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 0x2faa287335219f1f8f2207bab8f611e68d583b95463429365fce8ca78db5f372. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMEN2035482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcd950b1437f01161cfca8639c5bdbbb5fc267efe1ac6309d1088b205e98282. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:35:40Z), 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/QZHN72179280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5784f2e28e9e64acbc8ad5486b20a2d2a156d9f3035edb0962774733061e60b1. 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/QZES82250657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6145137f70ad8ed5853eb3dbd60030778e0ee8e7f42d0fded07aaebabeae766d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZES82250658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e925ffbdc80ecac7057478c40e30e16c0f22dd9b8934cff90e08c8f711d8133. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:39:25Z), 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/USUYG1524567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737939fda2175801c22d059265c87321fae763e6e18f191798a25be03c0faffb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USUYG1510718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff961fe2e65bbc6f125d5bb02b466f4b48488e7ca15a1d78062ebfd21b690e1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USUYG1510719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db2f479264a4aedfac64c07a3e7fbcac69009239e36fd16dd6bb6f986a3a271. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/USUYG1571524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80aa2e9e62280a09b32b81fbc0b0df02fee89bc82b37bb0280d54532ff6e452. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:35:55Z), 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/QZTB82536978.