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 0x928859098a403a2e83f0ce315265fbdbb87b5ac5f216882bb5c1c501a5288b87. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c8b6839-54a2-4c8e-9a28-7d89a9feaa92.json and https://artists.proofprofile.net/proofs/artist/7c8b6839-54a2-4c8e-9a28-7d89a9feaa92.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 0x342296c479cde797645214188abdc9ccdc85a3ec0f2c21ffe373a997c7f56011. 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/QZWV32506687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa9c9ac346f490ff810dcc272c57f5c284d52e496cf2a0d328ba597fa9cfa99. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZWV32506803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15613ae6c2049cb29994cd4515651b326c9ca8d2299631291654fd2c2b507334. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWV32506597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd40fb096418caeaea95602b8e573f753e2ebd05475f6b84e230a18cad6ecb7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZWV32506821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e5c55ab836f5baa3ef185f1bd633a5b38f9d26b440f281eff36b0e1ca680f6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZWV32507410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0cbc7108db09b9dd2dde41e5d81bdcb7719ebf1fd5f5457224e5f3447c7c411. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWV32507402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458d3cd7c9871c8dc878fa01838cba39ed61d6094d976ecafb61904b81f09b4f. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZWV32507381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823bb0c6c3b047b8df4690671c4daba981ab04ee542d9baf05d70a61aaec7dda. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:53Z), 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/QZWV32506844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b19f8ed27923d63f90fa439125865cb1cb41a847fd8b30fd4d73b530c654564. 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/QZWV32507386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f8039577da1c5f697e11c31e8555d79dd8ffc1e0512495d70a6382dcdb6c1a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWV32506764.