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 0x53f1eb88607cceab160f273ff977a240a877e598475ea8f69673c7df6d8c8a2c. 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/d645ad14-de1d-4d64-a355-e7b059b21722.json and https://artists.proofprofile.net/proofs/artist/d645ad14-de1d-4d64-a355-e7b059b21722.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 0x5b98b1760485485ad7a2108808a9797a8ab337805bf9969157a022012a826abf. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USANG1401379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91e78f17e2207a34ac4a4afecf039160cf867f4a72b632f2b3cbe9e11ed37c1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USANG1401380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0487fee81463a0c1f9f76191dd7d904410e27384bda9f23d2e766d994ddbd622. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USANG1401383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb195d0ae580c68f6397ffa6ecf535b0bc32f6819d79c55c509989089188c0dd5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USANG1401384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7c2928d6e3fac4d9c3ad65252716b719d994e33b19a8b661ca9ef01e37f73e. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:59:39Z), 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/USANG1401385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa2b95027e0542f015b6aaf784ecf9dc320ce02bca6693b9840aed96819243f. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/USANG1401387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bea802348e13a1010e5a3081e3efbc8fd406be38bbe27ebd9e7fbc121e00855. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:10:04Z), 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/USANG1401388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319f0a6ada414b2bd5f1f18d235b05e2c7fca0900c6cb1dd182361c938dbca24. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/USANG1401391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234de6fc1b5d1361e59e5451a38b0018dbcd9a89634adab7be7254a0a1c8def3. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/USANG1401392.