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 0xb0983aeb475c514e97880ec0eed7cef24100bdc07e5a214ab8c997fb0f86255c. Chain 2 (Bitcoin): anchored in block 953947 (2026-06-16T13:14:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22c5dda2-ed6c-4611-a9c8-351597902061.json and https://artists.proofprofile.net/proofs/artist/22c5dda2-ed6c-4611-a9c8-351597902061.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bolo Tumi Ki Amar Hobe (OST of 'Sir I Love You')
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 0x8aeccc5ce5a811a77dd5652b26b71ca8b509b7421c30e2e9b5ce0cff7f2012b4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CA5KR2075228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf136a4ccdb41b1fe713d4330d7548e394c8d627f262651cd76dc2ac40d71ad80. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:54:24Z), 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/CA5KR2242102.
Naao Go Teney (OST of 'Bhalobashar Karagaar')
Priyo Khamkheyali (OST of 'Hothat Biye')
Chobbisher Onuprerona (চব্বিশের অনুপ্রেরণা)