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 0x4e7b2344eb38dc2daf654be8f850f737961a7aeefe458273f3f1c69cb1724fec. 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/cbe6b91a-48a7-44ac-a6dc-f28252ee6fe5.json and https://artists.proofprofile.net/proofs/artist/cbe6b91a-48a7-44ac-a6dc-f28252ee6fe5.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 0xe457fb8ebcc71d0b72f5f8b1cf30776c916c5d0030d50118b9b6a95316915ff4. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T08:38:32Z), 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/IL5841409855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c61a20530167007bd479ce2b3f84ee3cd8bfdea7e18be308ec1e7d150ccb638. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:02:52Z), 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/IL5841409858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bffb7694ee107856bd21bc43b3681e5217f91b6dd21cc8b55170c827fa7d15. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:08:38Z), 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/IL5841409859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753e4b47c4209ca36cdaf60a6c1cbe9c4271b9c02ec6ebe9ece98cb171635d1e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/IL5841409860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664e7f6cb651d61e8e3b26d0b331eaf1aa27dcd44028c75d3b690fe45132aa2a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/IL5841409861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfb8622f12cc921fc2b187b90137282930d41ceaaef29098dfb6af8fc912552. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/IL5841409856.