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 0x74751f9bffaac58b79726dea9dbb34e8cf93f538aa077c1d3dc27aa65b7584ba. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88e7dcb1-79e5-4685-9e5d-43b996b6b188.json and https://artists.proofprofile.net/proofs/artist/88e7dcb1-79e5-4685-9e5d-43b996b6b188.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 0xbcb5e0cbafe22f9a6284d19e32114fd7d7928460c0371aa4c64797c0af3c8e85. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZTB22459081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2c97fb2efa854fbe975e481c33ca847ab07341fc3149eb5b82dce2702cb7a9. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZTB22459082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897a59540bb62a78bc32a986dc96bf40ff25c2086ae075a67464f4311a7f83c1. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZTB22459085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2aa81103f37810cf1037058cff88fe3b18d29cc9b50513d310e835380b0d5c. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/QZTB22459086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3e5b772751d8284e748ed02df92ba772d120292bef685d847511631e63cfbf. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:58:40Z), 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/QZTB22459088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b850c077530bab22a9688201a0743b29e2a068a8bcf88df2443b5a6cf3a4da. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:48:04Z), 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/QZTB22459089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b15eac841b3945ac116bfcc3107c49708e7264e30806247ead1f1b5a6408474. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZTB22459090.