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 0xa00ce711f7a63a53ef612b6436f2385157d4b79d30afd7716d8c80d4d17e7989. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2e1563c-08fe-4249-915b-142e3fc7747a.json and https://artists.proofprofile.net/proofs/artist/e2e1563c-08fe-4249-915b-142e3fc7747a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
3 Rihanna Instrumentals (Instrumentals for Mixing and Karaoke)
We Found Love (Instrumental Version) - Originally Performed By Rihanna & Calvin Harris
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 0x7a4ab23583470da92be1db4a18252c740c2f184b7875d10eb2ec51175395f24b. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/DECA51200196.
Pop Instrumentals Top 50 (Karaoke Version)
Baby (Karaoke Version) - Originally Performed By Justin Bieber
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a16b24f1eb03120e8167d12f17f5275c209cbc987b4aa04aad667a4f5dbcd5d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DECA51100149.
Take Care (Karaoke Version) - Originally Performed By Drake & Rihanna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb492a0d40db09fb55187e71f574242d6a4c4c9f7cffb53d7801e38d4b9c80c76. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DECA51200195.
Problem (Karaoke & Acapella Version) (Originally Performed By Ariana Grande & Iggy Azalea)