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 0x28bb3d9ea8b34917ee673f21e247436af2560c734071887a59cec96710feca97. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ebb5f9c-967a-41bf-8560-b09a4783e415.json and https://artists.proofprofile.net/proofs/artist/7ebb5f9c-967a-41bf-8560-b09a4783e415.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xe3a65bad3fff92c203796245a19c4aee3b7c2ffedc6795685e20a3b9aa876d13. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:23:23Z), 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/QZFZ72591763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee1d4cd833c5b033226f1d68b816427e1acfca88a3d26a6533e6548096edbf6. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:36:46Z), 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/QZFZ72591764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebfb1d99baff9985e16f4396fa0ad97f660d76612482d901ff4efdeb1baa983. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T19:02:43Z), 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/QZFZ72591765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8321c65fb34d7e6ba0020ac11b0fab57f13ffd0198c8256aa99f8ceabde2e1cc. 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/QZES92599417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89af31acad67949fa60fcc078e71d7939fa1fef7e1f6bf7241bd443870ac6156. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZK6H2501898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a876a60545e8ddb42930a342f597f0cd1a576b11f2c0c3315067eca9acc9ae. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:24:40Z), 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/QZTB32539930.