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 0x0c3485cc3925f4f5308bb70def0e304496e825d26fc646a7832e54f064feca11. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c347e15-7ef0-45aa-8a26-95c9d283baef.json and https://artists.proofprofile.net/proofs/artist/3c347e15-7ef0-45aa-8a26-95c9d283baef.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 0xa5a82f2f87c2bca74df4622ce8e2a9739d68d6855aac21f245db5d2c2869bdb4. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:38:54Z), 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/ATJ782501005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4bf4227610e561f1447ba247cbec5cb6a936cb578e9e8c8f7125daf6dc81663. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:46:52Z), 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/ATJ782501006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e3f7c88a63fe65bb5a021e8fc742aac6ec84ba9e7d45b7ed4bcdbf383a6571. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:24:34Z), 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/ATJ782501007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12501ec8dc8ddb831708027e8e6213ba2299a65e13edcdc930f89215d7103ae7. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/ATJ782506061.