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 0xcfc5859a968e102eba399f240ca19bd42d25865b892a8c67f33a96d6167afe83. Chain 2 (Bitcoin): anchored in block 953954 (2026-06-16T14:18:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/261b8802-fc23-433f-9bca-f3f8fdd1b04b.json and https://artists.proofprofile.net/proofs/artist/261b8802-fc23-433f-9bca-f3f8fdd1b04b.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 0xca7c2cc73c6505a1571ea2c279e9d2c32aa1bf8dffd36945cec45da84a9266c9. 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/QZWFP2565634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa563882cd2fa56e270ed9510442a363d149a725c590316471009a7ea80966744. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:03:43Z), 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/QZZ7R2536170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab2f1962093010793f068cc4d7160ed5549ec7fca46073d93d541521dcc0ea3. 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/QZZ772582538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13eba6a0ccc04d1400b38dc99fdf50d26646d01bf0cedbaaca0591e56400e485. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:10:33Z), 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/QZZ772582539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b7f75ac176fa58914cafacb1c16125f564874e1b2b99528f0fb7d9f574261a. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:18:06Z), 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/QZZ7R2537446.