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 0x8db8f007cc99c99e9d2b14ca8a9bdf2e06ebd6b2486cea1f35e779b681243d6b. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfa0ee4d-f75c-4076-88be-cddc29ac1c24.json and https://artists.proofprofile.net/proofs/artist/cfa0ee4d-f75c-4076-88be-cddc29ac1c24.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 0x5e6416898c81da6ed490e3bbe0989dd9ca8ef59be1da38be54cd267b1af87d7c. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:46:34Z), 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/QZZ8A2428739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1effa079d1e9e64ffbaec9567f05c83a69728f0eb8f70b04d8d79e08fbd9ba8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZZEB2402315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3fbc07b4d1e19cdf89d104c4e72101410eb469c828f05095d071366b8fcf0c. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T01:58:55Z), 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/QZTV32570981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5abbf8894d3ba02aae3ab820ff97053d63acb5136211c0a87d9e0119ffee831. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWV32536977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1145c650551b5b65685df92be571472eaa5e5552751fb8f839a83e969eeeb5. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:17:57Z), 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/QZWV32550057.