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 0xb39ca5e3889b9c1f284f1a2458c1662f383626c72d0585e254c753bc87cd6c81. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93e0e8a6-8bf9-4592-b999-f16770b7a421.json and https://artists.proofprofile.net/proofs/artist/93e0e8a6-8bf9-4592-b999-f16770b7a421.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 0xf4167f3310d89724a9217df6a8450a5c1b0bdd2c4304f85628a5411a53e1b377. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBPS81577079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcabd278ea13ba7e39b60f4f21ee70bcad6d283d458201687033115c409d23728. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBPS81577080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159d8c595ffa2b864484c07ae2cd876a84bea75642b6c856ec46c7aeb9461c82. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:37:46Z), 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/GBPS81579999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b2046eae33411318822416689d27548537fb815ca40132f42edf08c022fc63. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T16:22:07Z), 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/GBPS81613951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fe78823afbd58dca29b3037af4fe42818e9521f05ee0fb0fe0ac0604e1fd02. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBPS81613970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fea1f8fb7d6e8ed29382f5ca790a9eaffa0898fc85d0bd5059e95100a09b27d. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:23:29Z), 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/GBPS81714369.