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 0xbd2beeefade8d91b617b5a7f9664e6d988eb7ad7b1f63d565dd32b4fa2b4dd53. 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/3b8df64d-5de4-4d1c-b44b-c3299323ce20.json and https://artists.proofprofile.net/proofs/artist/3b8df64d-5de4-4d1c-b44b-c3299323ce20.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 0xf5a45bfc5a360c825d4d158cc4238a39f665b84b124d70f244ebf61768436d17. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:03:11Z), 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/QZFZ62010249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608882f4feb068ddb3eb6d1d9a3dc3f1055ba8d61881450284f216701037e802. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZHN32169875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0051602ebb544e99c25719271806c0694e11a46b5b984a204edbf51f5ae042bb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN32169876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878bf9b6ed0f0a371705b4042dad0b405a6161e4be76871c70e3a3789b53b523. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:58:21Z), 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/QZHN32169878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf82a64d358a8a93da44a856c4d05c73463963bc4bfbc2a9a3d28705a0601745. 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/QZNWQ2235515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4cfc32c71e4f3a849498dd4224308c80c1f0b018c8829ca6a3043b5e4139e7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAU2207606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23b8cd96c07d5ecb144f7ad3d60a9dd72f3837981921f35347633b589cbefca. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTB82402149.