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 0x5a00934b536c3b1f958e7f16ee218d96a3d833c7f62e76aad4c615c5ade6c838. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/252f9ea4-43dd-4373-87fb-fa0113c2fce0.json and https://artists.proofprofile.net/proofs/artist/252f9ea4-43dd-4373-87fb-fa0113c2fce0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
All Time Greats of Firoza Begum, Vol. 1 & 2
Feroza Begum - Evergreen Nazrul Geeti Hits
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 0x556fd1ac6c1e5a57ec4471ccaa587d4bd306ef48869a943cc51cd392edbbf677. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:52:57Z), 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/INH119612990.
Jodi Sorone Aashe More (Songs of Kazi Nazrul Islam)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f58195a9aa5c0221c5b50c92926c492e9ba422f1b9d1dd581351f8b353027d4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/INS171806365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5336afacbed29af04dade2958ffb6cd9726047fc5ab3660349fdc4a3e5e51d3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/INS171806368.
A Tribute To Kazi Nazrul Islam & Firoza Begum
Aamay Nahe Go Bhalobaso Mor Gaan - With Narration
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f6c84292c61b8385fc85a2043624a746d9e26b71efb6bbc46ca9307728f587. 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/INH101202720.