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 0xa40e1c644b1e92111b8a6e7be279546a4d4c210aa764efbe0bfb68f59811f6cf. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fab9c69-c075-4d9c-9bb7-9a97ed9ac47e.json and https://artists.proofprofile.net/proofs/artist/8fab9c69-c075-4d9c-9bb7-9a97ed9ac47e.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 0xc0b756fb0aff29242081f4574bc26e2f81b2c930b9612b968335d5cd21b635c2. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:37:11Z), 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/QM4TW2409703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5976e69a1eda13948cc8933afe65ba8b8c9dbd8759ddc8ac69dd80be83325735. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM4TW2409704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb9f065e397861193dda81d56727c1f58deb45ff1a45e012307abf16f81da58. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T19:54:18Z), 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/QM4TW2409706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ff5b88b109837677a9772c16345b168dcdecd0189f3a7f6e8b079e28d1dde7. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:29:44Z), 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/QM4TW2409707.