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 0xf429faad093f53c8d57013a0bf8db9464a6b41c0f40603b3b515b3815db66257. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4672cdec-6cf6-4b5a-b2f9-6214e69aa784.json and https://artists.proofprofile.net/proofs/artist/4672cdec-6cf6-4b5a-b2f9-6214e69aa784.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Coffee Jazz Music - Retro Lounge & Jazz Instrumental Music
Dixieland Selection (Instrumental New Jazz)
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 0x7ff148eb33eab51717a24b47e1f7aaf3f4a07902a669656e2f61738e3b3a179b. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/PL7E62497243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x590f08ec5351bee640bf7d8fbf79c86cd2d6c18edf6bb6b9a099dbd8d711bb7d. 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/PL7E62497244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1beea4836d16b81c27a203f73c675bf985a62de41fa1a7ea224a6d2bdad38f. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:46:11Z), 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/PL7E62497245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f1cb6f2d636fcea75844e22da181b80d807649e4fc4d33f43c04d61f31a6ec. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:57:56Z), 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/PL7E62497247.