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 0x1a2c942ad0922e83fbb07fc3626964ab5fa88e4865eac55483cea4f6d8b08635. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6951b849-14f6-4167-8993-c23eda561d79.json and https://artists.proofprofile.net/proofs/artist/6951b849-14f6-4167-8993-c23eda561d79.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 0xbe0b951f6623263f140c178c236bfa674cb33380ef44f89a4b993ee5e83850f0. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:11:04Z), 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/QZES72597008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90786820ce55cb8765a1b014f866d2f7b2f6f959ff18fcbea50fc8e18192599. 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/QZES72597010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423cabe40301f06192c23201cb19ca65d07fbfed8113de731dd3e5f0ab055272. 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/QZES72597012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba83c113022b91a69704a085d74c1d9573772d646c67f9b885e2aad597e993b. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZES72597013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a136543ffeaf226ffa5a2ea891f4442ad5d58bc0230dab5395be56c4fedab8. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZES72597016.
Lady Swordfighter: Escape from Hachijō-jima
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94dcd4dcbd463ba051b8a0a09d0a61ac1fa3cc09c08bc1e38e9f82c5d24294b. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:50:26Z), 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/QZNWZ2590227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd2821e62e427486e92f87b2ce06f3a325d467d2f8cc8283f0e0c5664c7a0386. 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/QZNWZ2590231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b99cf7a95ddf61b405f1b012772513de6e7968f1590dcf1feba6a6af710b297. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZNWZ2590233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee5526d2aff17c19717e10481f2ebece2e16c56e93fe21bce367d97a34d6b3d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:08:43Z), 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/QZNWZ2590234.