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 0xeda59abaef9e098a0a8700a3f0c5ee0e856856b1b725af7df06e312ef9c4df83. 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/d50e788f-a08c-4580-aa25-da8322ae5c93.json and https://artists.proofprofile.net/proofs/artist/d50e788f-a08c-4580-aa25-da8322ae5c93.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 0x610b09f9cdc0601c313bcb135907246d64445a09116da9f9964aea2be81d327f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:22:34Z), 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/FR96X2437074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2923e6bbc3742b82a8a1882d3d89ac49d84035c2d4d5bcbf6e180027ffbbbb7d. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:27:44Z), 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/DGA0H2429632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1ee63e927715dbd10eba00e4f39ff109fbc47000e63fd826bcc6cb0e63120b. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:04:12Z), 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/QZTAW2575907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653d887d7cf87849d0fbc193c5d622887eacf705264b73279765c5183b10bcf1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USYBL2400949.