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 0xaac9f093c8b48e4d3d01e1ac1e28505d359432f9b4d836aa4d5864f0ea3a52ad. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bebd8fe4-47fc-41fd-b947-ce58054ec4da.json and https://artists.proofprofile.net/proofs/artist/bebd8fe4-47fc-41fd-b947-ce58054ec4da.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 0x0ad970f065e286282d625b529764656d50beede889732ef24e164790233795bd. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T15:56:45Z), 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/QM4TW2308834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a970a72428def5d3967dbc2d0fad3373628cb31688a53ff1cc3044446d33ee. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QM4TW2124905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef74a9da57cc9718ed5864527ea50b2272f63d8e9954e556329dad12506b3db2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:02:37Z), 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/QM6MZ2133404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1880e0fdd95f074987f5fadf9892322edec419afef869ca3cb5e7b0f434ac3c3. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMFME2228157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b703c45d1aecd4c70176b28d057fde49e91dd555f741a7503965e643e4e1ce. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QMFMF2314856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f0f69ddd6071c2ccda67b6c1711075b160d601c365735edb5472f1c8698d7c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM4TW2402478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e15b48e92e59737f7a6554d7a9d54fbe477d9f1ceae697c53c0af05d25693ba. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:40:32Z), 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/QMDA62481995.