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 0x75cc6ae112018ab867a62db3f9855fb17cae522905ebe8c9657c25077fb098ec. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4765c5a-706e-42fb-88ba-a942bcc7c75d.json and https://artists.proofprofile.net/proofs/artist/e4765c5a-706e-42fb-88ba-a942bcc7c75d.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 0x9ecc373f1fa9283324eab4a60ac6fcc81a0b72093730fa9989f697a51d9275df. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZFZ61945511.
Playing Cowboys and Indians in the Woods
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe00ddb03c50ebf610ac21f3a8a89b7fef0065faddfebb6efbe6f65847b0ca1d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:06:19Z), 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/QZHN31940641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437b87b1fc2230f59ea3226dee1a84cd1a6b890ec273561ea6b872a76ae6ae59. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZHN31939530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1e14fd01ce7ecee053019a6e8427f71ad9272f6d7f308f4ffdc789695f6bd1. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZHN31938845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753322bbf457caee192d042f0782a0c9171ab65549732ce5aa19dbc7cad55dce. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:23:13Z), 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/QZHN41993965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf27d6c4695ebb40411fb2e22d7ffd176ed62eff1ec0010bd5f4a1d81a2399ae. 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/QZHNC1993833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa978723bb6737e61cc35f2bed13eb91f0471c11830d8f5d53ca14aa52a7c3f79. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFYX2008108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b124f8f6eb34930556564d670ba8eebe59e0c26f75c46cb5c1f68d1f54183b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFYZ2061422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bc22ce1b86c5cd97c20645169fbccfddeaca5686c86ec01a69e96a64c6f649. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ62006351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9214cd0e15c99d5fd425626baa0cc8d7522f81f5fc96c366106728c25d322ce0. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZES92065000.