thumb|Katarína Knechtová in 2007 Peha, also known as Peha & Karmen Pál-Baláž, was a Slovak pop rock band from Prešov that originally consisted of Katarína Knechtová, Martin Migaš, Karol Sivák, Marek
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 0x530c482780b415d1b63eb26bb95876a4624f3b40c555bd12b87d56b4563c8777. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1378730-0045-4878-a90a-e7f08f6c47a9.json and https://artists.proofprofile.net/proofs/artist/b1378730-0045-4878-a90a-e7f08f6c47a9.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 0x8579d1bdac1ace4f3405ace4175feddc2d349a216d3780542e967c3b05a6bcdd. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:51:41Z), 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/SKA129935401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42741e7e4c4832917b0962bd6c011b81f34ef8513b0e483a514d9ba0220136ea. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:22:46Z), 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/SKA129935407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920b3cf2418c6bd59ab24f98837697cb055cd4b43156cf405656418090dad60d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:26:30Z), 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/SKA770103101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeed3429b9c990a7368f368d4d0ec1bf17733cd2e1a4aac5c42bb84a2bd04ddfa. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:58:34Z), 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/SKA770109302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852a33c7754aab93a6c6d17999103454a0da05a3093caf87215dec65ec9b26b6. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:05:56Z), 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/SKA770305103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87744d322c38fa58616dfb368fffb09ac90a4c1eb943dd92aa722a2a7874ff3a. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-17T02:49:51Z), 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/SKA770304101.