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 0x084cf145626a7149c3c8a46cffb9f798152252a7aa9df6422a452f794ebaf44e. 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/966cafd5-8ef5-4318-bb68-e6f4e29281ab.json and https://artists.proofprofile.net/proofs/artist/966cafd5-8ef5-4318-bb68-e6f4e29281ab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Endrendrum Punnagai - Tamil Unplugged Classics
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 0x5c0e06dbaac8153d69e296cb03be0b357c4811319773e3b57a5b84a4a2f9cc60. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/INH102215913.
Pachai Nirame - Tamil Unplugged Classics
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cc556703bb9990ee8c81239492e4d0282c0533cbee89b800c193cf471fff6b. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/INH102215912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87cc556703bb9990ee8c81239492e4d0282c0533cbee89b800c193cf471fff6b. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/INH102215912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3c7d7e4269c03da29b500e665dcb649601042996e584413170006c1cffdc9f. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/INH102215911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2df82ce105395ec8141a506d91cbfb80c6601f494ee8d03d56ff7477ea2d481. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), 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/INH102215921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93eb78b202813ad2727d5a2437151512ed7773ccde03c8ba3dc51947a94ed580. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/INH102215920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72e076d81be14a05033088e67135670325d518d20e3020490c078fb352ae8593. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/INH102313067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad403879fe198d949e0c54122da027eadc39e14cad88e1f69ca7428da477041. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/INH102314502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9214569631c5284f82b6fab759c5f67f9aee74de62f998aaf794ec8215b61895. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/INH102405949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2a46b619be9f94bb52ff6ee3954a113bdd66f0fccd7317e086d2f1d856ede2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/INH102313066.