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 0xb767b66baa8ef7a45c3d8b1008581beb80a51d4799242c6820200cafa8c033cc. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa36b852-e9a2-4f63-b26b-1c6968cab9af.json and https://artists.proofprofile.net/proofs/artist/fa36b852-e9a2-4f63-b26b-1c6968cab9af.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 0x1b392efa26ee6a8c83eae475f0b799049e53c76a1381e6577f1652df1748a1fd. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QMPKX1433810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bdb905e71286e072718daf41f221911a1fcc6ee28e6233a6c969463fdca38f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/UST8K1568715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa82bd05cc9d3fb88c36ffe548a65bb45a63638ff462bd1cf8831f4ee3a3e26. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/UST8K1568721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506435b021613aa5a06eb100c8a08732cdaeaf05abacf7cdf5029bc3d6b5aabb. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/UST8K1568723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa76ccec7c395a0af78d2dc1999ab44a2cccbab681d0889066503c3aa966ec578. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/UST8K1568724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd453d4c2a6618ef2506d71c0a66d699ee8ebe2cd23e29b97249cca3c0fb1669. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:03:10Z), 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/UST8K1568726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf054d8cfdcb7bc726816dce91e6af35a6b89d1d96b25b61ea5e813566dcdf33. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QM2PV1659820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907d7b3f4d11371e8156a2bac068fb82e2971254653479a82f19cbdc4923080a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:01:27Z), 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/QZAPG1745276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba0ab328d0dbc8c60903d8238234e5fd590657e42a062b32f117cfd66140a40. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN52011016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9de466e1f643cf1475b0093189932e45b15cdf93aef77ef2db09d73cb0e9f0. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZHN52011018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877427e452e554e60235742199fb9b3c99e857872c3b468147cce79fb02c912f. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZHN52011021.