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 0x6fed78beabe77993ab08d484bdb3eeeb324a327b6497795c1f5b06961d6c4c4c. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7e51a44-66cf-4552-b764-2ccef9becd72.json and https://artists.proofprofile.net/proofs/artist/d7e51a44-66cf-4552-b764-2ccef9becd72.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Liszt Paganini Etude No.3 In G Sharp Minor S.141 `La Campanella`
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 0xacba0dd2f317300d3e1909c451c5d74745252831c329d3e9ec84ec3001e5250c. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:54:19Z), 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/GBSMU1634328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8ef57a36a53224125491ff71580560265f7bdabdc75563245e99dabebd3454. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/GBSMU1636751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e8d5ec9174f13a318663f7541ab46a620f93ab0e2ca2139b099b4e30a5390d. 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/GBSMU1636752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382638a42575270a83372d4d6974fc37efc94f204566df0b75d4084108d1c7c9. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/GBSMU1641813.
Winterreise Op.89 D.911 - V. Der Lindenbaum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb67e60cb59199ab486ad9fddbd03e24c0df181d885bdd2b74f1a49c7a11f71. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/GBSMU1641814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdff2531ce752f6daa2c150de8948fca0bd427116c594ba20f37ff289814b78d3. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/GBSMU1641815.