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 0x185bc7807b35053e5c609e990a71cc5daf0c120a1c828c032ed92342b69159a7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15884c6d-4f42-4f4a-80ff-eae3538114c1.json and https://artists.proofprofile.net/proofs/artist/15884c6d-4f42-4f4a-80ff-eae3538114c1.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 0x9f70d9baa8cf5df5bb150ce594dcee4a3c66bb975d45053e4ce67fc846e93152. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZJDZ2000315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f70d9baa8cf5df5bb150ce594dcee4a3c66bb975d45053e4ce67fc846e93152. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:41:26Z), 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/QZJDZ2000315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4095c9f073950a89651a87f877bf0c8b87497c13460d0316080531ef82147021. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:52:53Z), 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/QZJDZ2000705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de99700d69789178380295f7713e741e1d00253562144c405721b2d76d2668b. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZJDZ2000713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8475cd331e38aa7240daad296e6d7be57a2e3998ecc0f2a6ae14df11116bea. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:54:26Z), 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/QZJDZ2100657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb70a1aa009155d0411acc416d7d8f83c743fd094b642e64057a13c7c8a34667. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZJDZ2101551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f88cbb868147b4d8fd7d27480d767d8934c59004cbd397df55e47673c237869. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZJDZ2102815.