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 0x99f9f2ff221f9a443f7393ac849dcc19dda55815f4fe394f363dd60248446249. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3c57e2c-6ce6-4576-9c55-8c6c41e4332d.json and https://artists.proofprofile.net/proofs/artist/f3c57e2c-6ce6-4576-9c55-8c6c41e4332d.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 0x7be49b2ecb5839984ff0249705ba8656c50547bc75925a6a45e21101abd2a716. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:55:04Z), 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/QZWFH2376547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54dc925b26924cc934efc67ded9668e98a952d636c4338924c157c369863ab7e. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:02:03Z), 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/QZES82531497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a9741915124d6165bc8c6cbe6f49f0bc66cdcf4fcd69ad0d49a88ffe2c4153. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:30:04Z), 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/QZTB22594462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76832ee8502d0aa74b3f8d4c9e1cac266741a1024b70da4a13f20af9aa187c7. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZZ792553889.