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 0x30df84cc22bec091096dcef7923b192edbcbc6e9987017cc81b6b4a7ed979dd5. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6f45454-2b26-4e4c-92e6-a31f376919b5.json and https://artists.proofprofile.net/proofs/artist/d6f45454-2b26-4e4c-92e6-a31f376919b5.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 0x50d04c360d217b46f81eca9dcbd3b1ab547b4122c0b1975cd4160a774ce9b631. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FRPZ92223100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadb4cd8860844fea241882f6f9cf0756c9583c849ba8b5c2649a0970f2b0e86. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:44:25Z), 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/FRPZ92336410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac2b9b3a5749557defd8cefad476a7cbe783ac8179eb956d4af5caf26f8a96f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRPZ92415480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2059871c2d17bf3d257fe3980421328a336c8fe9e24db6ec16496492974c688d. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/FRPZ92415510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df42e8d9143575d73e2738b833e42b7402b912240a86e5bc00d900ac6ebd4e7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:50:08Z), 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/FRPZ92415500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afa75599eb582f7a1778314c95fca3cd436341ff9378cb55716af4823d0b611. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:37:45Z), 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/FRPZ92415490.