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 0x814d1d884f1e54b9f6ff2591c30cd630889dbaf2bcce4415c8723accb47cbd70. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/56f8eedd-1e95-4ad0-b62f-800cc62ecd6b.json and https://artists.proofprofile.net/proofs/artist/56f8eedd-1e95-4ad0-b62f-800cc62ecd6b.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 0xda37c37f4d8b42f9faa70c8d2a5e266ad8d531ac30d7407f4185c1837084cc80. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:38:59Z), 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/QZTVM2409370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b156fad257ae5f18bc1061b78cd78347e58e3fc8b4ed9e205a671a6cbd103f. 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/QZTVM2409371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6440746577da4c511469fa303d986b2b4fad7cbc1e5c53abaeb633a2ad035a6. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:45:07Z), 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/QZTVM2409373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a84599d5170926ffeffa9864df132f6bb96b28b43101d950170073f49bb91e5. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:07:38Z), 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/QZTVM2409374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8eea0ff6ade49b63831bb79ce25605e8d8447dfd7604cc0bb177e7c4152579e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTVM2409375.