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 0x082744db81b53c7835df05fe71ee76a27d3ba19c49ddd601c0d87c203bc7118a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88c75b92-d125-46ef-8a35-6a88c866e5be.json and https://artists.proofprofile.net/proofs/artist/88c75b92-d125-46ef-8a35-6a88c866e5be.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 0xa261dc81ac1af54010d02256d6624c7430d8f6c1b31c74a97c68d66b2152ca5e. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:44:01Z), 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/QZAKB2366096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd29241c90545e83cac8ecb724ff68766e303bc10b54941174f52c2fc65596b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZAKB2427822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297c5a40f4e84b20cdaaa33a21972127e5120e45efdb00fc2e8355b2bf05c399. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:43:57Z), 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/QZAKB2432695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770b318f983f3054a3322f61b78e68873065f924f10255b146b7d94953b47cf9. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZAKB2456949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05749cae3242fdd028c132d3a6c351b75dbd5535fc88e3486058b5682697668d. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/QZAKB2464675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf8e192884bd3e3658bcf5762b2e336e1620f0f9391cc416fb819185432c206. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:38:40Z), 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/QZAKB2530189.