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 0x5607b665d08f48b49cdade36cff161efe6221509d82f16a1c7a304e2e5b455bd. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2db767a-dc8d-4c3d-b467-4919c0d26d62.json and https://artists.proofprofile.net/proofs/artist/c2db767a-dc8d-4c3d-b467-4919c0d26d62.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nilavum Naanuma (Nirjany Srivijay & Magisha Baheerathan)
Iru Vizhi (Santosh Hariharan & Rakshitha Suresh)
Amma Amma (Srijeyanthan & Sukanya Varadarajan)
Kanden Kanden (Srijeyanthan & Sahithya Gajamugan)
Uyiril Oru Pizhai (Prabha Balakrishnan & Deepthi Suresh)
Yaagaa Yaagaa (Bombay Jayashri / Kanthini Kishon)
Maayaa Maayamaa Nee (Shreyaa Srinivasan)
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 0xf562c5c735381b3147ef5ff1a95d721740ad57082e1779beb56de70bc9260ff5. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QZK6M2114052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245c60eeb0c10fd08e71a88e0510cd134ac178cdf5b9e8f7bf6c3fd6c3b8a48b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZFYY2296029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15a49369f2c96fc27a6dd1b03ba5f2952c492a89720d7fc8bcd9b15133c7010. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHN32211399.