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 0x85ca0ca65043746273b580be786660a71579e5a247d3c9a5d300c01f26c3e474. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7b49a23-e6e6-4741-995c-6f066a8efc90.json and https://artists.proofprofile.net/proofs/artist/c7b49a23-e6e6-4741-995c-6f066a8efc90.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 0x3936aa876c4c68128378f23a3fc25d9ab079923a0ec7fbe5ea2309368ba2e3ea. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZHN42017324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830c8d941807aa0268d024bb428b0fc401089110a88358bae644f9ea2f6ae02e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:35:13Z), 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/GBLFP2040265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830c8d941807aa0268d024bb428b0fc401089110a88358bae644f9ea2f6ae02e. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/GBLFP2040265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1408fb71096bd4731a0ee0c9d5008477d30ebd0b4a1b4f0472a1284e41dbd615. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:52:19Z), 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/QZES72281360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b4518163b7b6c90ba892efe94dc70177fc06351bc7f6c0dea20d5a7e116250. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T23:05:23Z), 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/QZWFH2404197.