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 0x81d5140e41647645be95dafca2884f16f740bd56cfd5d2ffe3ba574406b6188c. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e1931bad-e94b-4702-b1f1-f541ec808308.json and https://artists.proofprofile.net/proofs/artist/e1931bad-e94b-4702-b1f1-f541ec808308.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 0x9d74d5a66a53539112f64eb5ea55d5c041f06633668c3fbed1f084eb525235b9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:36:15Z), 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/QZMHK2578472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77d29d44b570e42b220e71a0774bfdb26e49e1d05861934b4be4107710dbf66. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZMHM2523039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c9137cd7533f2e6be425d7bb0ee10f8de55f008a2e1b0b630401dee815848d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:34:39Z), 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/QM42K2576206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074178b8ce7f1f773a4e9317e07cc3821e97a4cc72cc578f7a5f4a678389146e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZMHK2587861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fdc4cdd636e8f1212d1c55d90923638501e86894b34bff5a624fb71a80c24a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:41:24Z), 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/QZMHM2594643.