thumb|General Zdeněk Novák. Picture taken on May 10th, 1945. Zdeněk Novák (April 2, 1891, Paskov, Frýdek-Místek District, Austro-Hungarian Empire - October 23, 1988, Zadní Třebaň, Czechoslovakia) was
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 0x3802c796d9a9eb1923738b7ab2ea3b83eb765eb22872d44943b5d3f01f8f4d4d. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66ca4308-d5d8-436b-bcb3-0be52d054ccb.json and https://artists.proofprofile.net/proofs/artist/66ca4308-d5d8-436b-bcb3-0be52d054ccb.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 0x5e9f01ce1034654a3108bc6179478204800789c6c3585bb3a0c33c6470d450a5. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZFZ42415480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d2b718a1d8688db2d75a8810174769f53c5d8dd47cbb3a76255573377a43d4. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZFZ42415481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8111404ba3e1a53adbd1581957a8fdbde4f84ee07c660dc031da78398dc45ade. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZFZ42415482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cae1fb5f166c11bc0a6adfb9a5f2beb0b239c36102b0356bc9d1103506abf9a. 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/QZFZ42415483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776a770e79409d327feb263d228e9e681089c4e507e6c794a68eddfde79f9b25. 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/QZFZ42415484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90722871615ae6af8dd06bcf45423904ce73c97424bd820b817b9a5ab51101ec. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ42415485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35dcac5d854d21a3fec23702876da6845dfd6dc5379af8e8bc9c95406a8afccd. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:00:07Z), 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/QZFZ42415486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e24f4c2e29eaac526be865a424872f7fb3d3fd3374e75de5d97c628ff880a48. 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/QZFZ42415487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cffc2dc0f6128207c7e31b5821e8fcf59be701f479b8e9e01bf30c30a7b4d7. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:00:18Z), 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/QZFZ42415490.