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 0x0ff860cc91a22ae9c707c63d27abbaa90283417cedb1aa86dc0bffc8ddd26b8b. 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/2fd48938-d543-42e2-9b5b-e688c58e4a47.json and https://artists.proofprofile.net/proofs/artist/2fd48938-d543-42e2-9b5b-e688c58e4a47.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
O Dimitris Efstathiou Tragoudaei Marko Vamvakari
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 0xada63bdd4480a02e9e44c6e3243221c848b7e0929383b23da9572199b07477d8. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:18:07Z), 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/GRGM11702262.
14 Megala Tragoudia - Dimitris Efstathiou
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c25d721fe46b3dc3e1723ce5358e7df5bb4e8506828c83359935083313aa662. 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/GRE016800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f651984cb849c08a6281f1e14770c5849f3d1f6b848cb8063383eb57994b61. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GRLE10300433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a84ff8886d5ac7f8a3c43c3ce2218693c9f18b7ed0fed3dab13520612f1789. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GRLE10300441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776b8a1fbe5e602abc9ff8309b6fc49a3f3da22bcc056097c8d78b3663afb8b9. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/GRLE10300444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dceac6d3a16f260c066e7a6e8b579fcdc630e953c1cd841daae0c39a88750b4. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GRE016600791.
O Vassilis Tsitsanis Tragouda Megales Epitihies Tou (1966 - 1977)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dceac6d3a16f260c066e7a6e8b579fcdc630e953c1cd841daae0c39a88750b4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GRE016600791.
Tou Kosmou I Kiriakes - 45 Hronia Lefteris Papadopoulos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c25d721fe46b3dc3e1723ce5358e7df5bb4e8506828c83359935083313aa662. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GRE016800024.