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 0x384b17954b3ebfec6bb28e461df6e73b558935473a67936dedb4d29acf5ed53a. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ee36f910-0da5-4eef-bdd2-43f4fdb760fd.json and https://artists.proofprofile.net/proofs/artist/ee36f910-0da5-4eef-bdd2-43f4fdb760fd.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 0x0bd5631c9399be65d6ae652e322b6e3515507da72d9df5b33c532c4cdea17327. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/NOGJD9702010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda1ea7513738f8c76a7952e449c341a495c115fa4566af9f2302b5724c42d091. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/NOGJD0102010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bbdf38e7fb334e1c4679a886518dc8be10b073de6a6cf8a9db3064d15e36448. 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/NOGJD0102030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2701597324398865937d6f38a93d150af96523c505382f2e7bdcd8ff83e6699f. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:05:55Z), 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/NOGJD0102070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc483ae059e13602950e8e951f88fbe5be649cbb2e9b3966ecc6af931c66f49bf. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/NO4ZM1201010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b7787c62ba5922b9746a36b7d79dfb46061acb5b5cff6dd4e72be43b1a414d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NO4ZM1201030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3036660dbf4d807942029df1eff2009d102182996c787ab65216752b762e2add. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:11:53Z), 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/NO4ZM1201040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec080c498b3132668dab1850d516ca3e98ea9a8c00acbaefd5003e921aa934a5. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/NO4ZM1201090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4f41e325e0f21b9d634122a4a074db5c81ffdae6afc90bc416cd981e4f254c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/NO4ZM1201110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddc1f824eeb96455b5e0030c935bd7e28bc77a32684933a9a971370747bfea8. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/NO4ZM1802010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541bbbd48a83987a4c0bc1c24b86df2fab92c9b83a3246263c2f6df381f5f74d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/NO4ZM1802150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77ee87ba85a9e50f5961ac74774add89090952274ceea25b13d76bc14848e9e. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:31:22Z), 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/NO4ZM2401020.