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 0x241c02353399160a26c2e611ac943c9cd281c0fd6b69557ec427f5686c8cb48c. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a6536c1-a237-4236-b323-391355f4cd8f.json and https://artists.proofprofile.net/proofs/artist/4a6536c1-a237-4236-b323-391355f4cd8f.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 0xadcafcefe06fa41bda6e00188c3c3e5ceca66b23c60f6d2788f810faef0f916b. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:41:07Z), 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/QZZ782474248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ffa54acec5a42c2a2072e7f95d3fc1afe04ce07fcf501e72d411c468cf9c54. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZZ7V2428643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x522ea2385313e2e1806f9cf125918e328327e4e26a63b8ba8910309baefe6420. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZZ7V2428644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862e4457c0a8582c37847ad135e956b8ede2ae75aa2b544c1cea96b891615eeb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFZ62572154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5134c045961c3e03b7499b82615d1717842887bc4e974bc143f172ecd1ad7cd6. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T15:41:29Z), 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/QZES52532298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c82f54a01ff5f69441d6faac45d5493c65f54cd1005ce83ef0ecbf5d7401913. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:07:48Z), 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/QZK6N2535919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7862dc6a61125fd7c3d8c383b7ca7fcd7ff388e94dd26f4d0474f9327ec478ee. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMEQ2564559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0839a7c4ad0da2fc16c10a4d2532682104c795cfc7f28e06c72f65ec5f2b3472. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZZ7L2509408.