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 0x6825920d4c86a318ae23d7eed3b6f1dfb5bb6a020b1efd76c4d4996f8130dfef. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93c1d5f1-6450-4861-8b89-cfc9c0712c12.json and https://artists.proofprofile.net/proofs/artist/93c1d5f1-6450-4861-8b89-cfc9c0712c12.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 0xc6891510ced389c9356c5ad4c6f5de3fbed6c9ff54a8e3d0d2ffd4a6853e16ba. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:43:37Z), 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/USHM92179146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9331a6ce43a3d3f74b644a50af5a86df29b015c0d65744c9957d84307e1b00de. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:46:53Z), 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/USL4Q2435520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89619cb5614f5f0abdfd20e652035260971977e03db63720e72ab365e9d32d2e. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/USCGJ2082427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6dee2f122b53cb95bead8fa2ffe776c454e5d86ec867ae5572f534905f0078. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/SE6A92334796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c9ccc99def5f0e2b88c784ea6285e970a0daa2412ec7991b21a4492e01bcc0. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/SE6QE2099154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e99a73127099e3f073ebc17b89c6f8c41ed1511505c33fbb42806867ed3ad7. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USHM22369361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112d2196312559760204e3ab59f9905e07437a43c6747bc0728e82d2df50ac87. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:11:53Z), 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/SE6SA2059682.