200px|right|thumb|Zbaraski coat of arms 200px|right|thumb|Korybut coat of arms, for comparison 200px|thumb|right|Possessions of Zbarski family in 16th-17th centuries thumb|200px|right|Krzysztof Zbaras
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 0x60fa649f4acefca1f7ec2e4d0497fbb84b2cf0a2fcaa0aa31e6f649b99271ef9. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc82fb15-93d1-4e41-953f-8ededdc982cc.json and https://artists.proofprofile.net/proofs/artist/fc82fb15-93d1-4e41-953f-8ededdc982cc.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 0x1f2ae69a0a7e7a16c7ccdf941a1958de0862cca620c240e4095c471a21d96d3b. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:53:42Z), 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/QZDA81945585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeecada7bbde644a5935c7e19da0773b3f939cee66b5f2afd79f0cd315767560. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZTAX2245104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6123b088b5388e2b42549e7ba8b4ae939522ecf5ef0daecaf1b7aee446e6274c. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZNWZ2273146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833f0b5db9b25ac52fbb0239b60e9e1fc2818929115f42f0ba9687a982bcfe53. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:53:03Z), 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/PL44J2516691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f41fc2a19f30ecc8ce34e9e0e80e8f3946152f2080f04fcc903ce2838de6d82. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/PL44J2524110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc15542ae71fff831a3ed6d235dce670f893cde604c9266835ca5662b0212c17. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:45:38Z), 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/PL44J2524465.