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 0xe03d54bf71176dd879d493b246174bc4f8c9c5cdeb3693586d227f9f6a7c3756. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e5c335f-59b5-46ae-b2dd-41f19c27eb95.json and https://artists.proofprofile.net/proofs/artist/9e5c335f-59b5-46ae-b2dd-41f19c27eb95.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 0x9a63414338d2ecc98dd537c6d69d4e093113b779e3766e5ceb7dd5b3255a220e. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:52:32Z), 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/ZA56E1408304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4d07556574aa36852175adfab684ad1cff9f34f1fc959b2277b51bde4d05fc. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:40:13Z), 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/ZA56E1408307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828bc61de96f8d6dd40a19f3fa1bbd18e6576854790530028ae950c9611f2521. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:36:33Z), 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/ZA56E1408311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe276b28297664f45d0ff5281c099cbc609428051bd4e43e06e81e51e806510c7. 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/ZA56E1408316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd0d190c583006d7865381b1d821a4474c5aae4fd8dbc6e7f2f79184f92a15b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:04:39Z), 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/ZA56E1408319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dc8f05f3173de9ba7161fa2ecb4dec590427bab93a749587b44bea845b5c0c. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/ZA56E1408328.