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 0xabc94f4c49108e9b3fa8e5bd9a256c62967c2c61c0b2344eab1b0dd0368add23. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0990337-90b2-43b5-a034-0bbf178b9a7a.json and https://artists.proofprofile.net/proofs/artist/e0990337-90b2-43b5-a034-0bbf178b9a7a.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 0xb400dce4276e2f1e12d2a7f8b574e4ce8a4cd9e0798d5b6fc6283b37c4226198. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/LVL151904932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37115a07d8c66993d7ea2a6d96c9bd490acdc532a09580bbb80fa0e6897ef94. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:06:17Z), 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/LVL151904931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e77946548dafb5ca09bdcf950d65c0ff4756cc2856255f64b9546c64f66c8e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:23:22Z), 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/LVL151904930.
Native Music 15: Traditional, Folk, World-Music, Latvia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43c27de8dae5d8ba36c2015e2cf82ae76e0dc119d46713e1211c6519d2bca51. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/LVL151904922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x079bd3f1c43861373c33102797dfd5ea99ac6a11dcad868758800724d0f3e6ba. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/LVL151501778.