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 0x4e4a36b81e68a48de864337ac0924ea19b9ddccc2b615c8f2ce6fab5f2006c67. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c2aa77a-9fc1-4c78-a98b-2e667e76067a.json and https://artists.proofprofile.net/proofs/artist/2c2aa77a-9fc1-4c78-a98b-2e667e76067a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dillere Düştüm / Leyla Derim Başka Demem
Cafe Taksim (Of Guitar and Sadness in Anatolia)
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 0x1a5ebfcdb885ace5ac4bf270989f57652a82b66d1bfde70e37af42d69fdd9d68. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TR2082003434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ea7bfaa70ee4fb29e122f4b37d888e03c6fd6a3b26d1825755cf19bc07ecf0. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TRBAH1800021.
Sağanak: Turkish Enstrumantal İslamic Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd2a9060f93d88fcbe5cb33ddc4c327fc188d20e64fe3575524082c8a4e4195. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TRBAH2000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be6ab0c9652195b08d1de02be4cdb23b5c5ac4b2dfc1505d0c553ce14fd0f17. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TR1591201532.