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 0x47dec611d0dddd13d8badf1e86ce4fa276cf8c540fc8e69ce7eec6733868062a. 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/8fd0ae4d-cbd7-432c-ad67-f9cfdaa47b19.json and https://artists.proofprofile.net/proofs/artist/8fd0ae4d-cbd7-432c-ad67-f9cfdaa47b19.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
City Lounge (A Finest Journey of Soulfully Nu Jazz Lounge & Chill out Tunes)
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 0x103c8af9948a3bc032dd219554b8ceb30386f5de949bdbd5c66c28bd8d31a4b8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEHI40703093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaedd4570bf940ee031ed8c577b411f5815a7bebf9f9004809b935a7fcb529a0. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/DEHI40703096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee60732f9454f9db9191f13dc2c8882aba415b6d838975893162a8597f44b42. Chain 2 (Bitcoin): anchored in block 957895 (2026-07-13T18:41:29Z), 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/DEHI40703103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb48e7b7d0fa210861895f47625b4b9759f7b83eac7958e36ace9fc02dadf6c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USA2P2256318.
City Chillout (A Finest Journey of Soulfully Nu Jazz Lounge & Chill Out Tunes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b8c8db51512e73b245772ed771dcc602f1d24987b63149305441c2ba50bd12. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/DEHI40703754.
Best Sound of Chill & Lounge 2020 (33 Chillout Downbeat Songs with Ibiza Mallorca Feeling)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd250787cbabf88a7dbd709025f4c91a0de6be7a63f64fd2d20cbb4df34c1d120. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEHI40703434.