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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611a066b7deafab90432bfbd977e4d5ba1e23a1be231b12e2bfb06b27da3a773. 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/e940d642-1755-47fd-9030-e5894b952e45.json and https://artists.proofprofile.net/proofs/artist/e940d642-1755-47fd-9030-e5894b952e45.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac318e3535f73f5b47a22425bc11da5d466eefbaa71d870295c550c09fd79746. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG2013750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ac7ef3a5a5faa809a39b926eab4f99a5d065a2504d5ce32fb422df47ddb9b5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNJY2377892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d3f76eee6d66e435fa96d4606a83e157a8f98d6ed01546d13b9d8b5fa28fde. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG1506892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4c581e6767704ec9d1da3f3a8a15edc940df4695e2915b5c3eb48362cfc03d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BCBS22000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c5054ccad27eac6eed960de093728c93c5e8d1d382ac15e3060c616e0e2fb3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BCBS22000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac318e3535f73f5b47a22425bc11da5d466eefbaa71d870295c550c09fd79746. 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/US7VG2013750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93094463e7cbf90d337d55ec5905c710b2c3d2d66f2d9abda4422f2b458f4589. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BX8UJ2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d2703f0064d6eeeb0dc8944b77777db1bac77a8acf84a6fcec5778ad86154a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USFHW1300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac16cd28463c99146418144ba7556d4b8f5fcd29950ecf062bb9a0aa5de3baa. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXNT62205026.
Hip Hop Peruano Mas Na : Mixtape, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576eae89ca8c014f5b89bcad58f6da219935ae1d881fa74f0aa09a6ae3731054. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USDY41794464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f21fe18280fabb8ab5469f02979ddb3998394990edd88fecc88479dd8c70656. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCNWM2400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad670c42a3f5c3ac4c62691dc9ba9c03f3b215c6c899f7c218ef6161d29dcdc. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZNJX2046603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3449a8bf435587455b547dec8ced7ed47c6abe7301700b3440b80c3a4ae264. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBWUL2408583.