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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13eddfaa73f2c374db1c7da735a16cb7ad92c479a20979cf27a3480d55b6dd1f. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/821f0fd1-8e1f-47ed-8827-5bbaf48296a8.json and https://artists.proofprofile.net/proofs/artist/821f0fd1-8e1f-47ed-8827-5bbaf48296a8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Чоловік, Герасим (Traditional Ukrainian Folk Progressive House)
За горами гори - Борітесь - поборите (Ukrainian Techno Folk)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6bc8d1359f01c778d9ae5e1d8b787196d312381e6cfd61b69c0ef0f7bfad8f. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QT3EZ2582901.
Гей соколи (Hej Sokoły) (Ukrainian-Polish Folk Ethno Techno)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7f19edcfb416307722904f0317bbedd6483719aa62591be4813ab411d8f0ae. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QT3F22564031.
Зійшло сонце: Україна (Ethno Techno | Deep House | Ukrainian Folk)
Ти до мене не ходи (Ukrainian Folk Music | Techno Folk)
КОБЗАР IN DEEP (UKRAINIAN DEEP HOUSE FOLK)
Томагавки по кремлю (Ukrainian Techno Folk)
КОБЗАР Piano Vol. 1 (Piano Acoustic Folk)