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 0xcf70515b8362fe3504d5f7177190478c62822416ffeeb8329546d50a3a4ef1f9. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ba95a2a-69a1-43df-a8fa-ea5bb8ca09ae.json and https://artists.proofprofile.net/proofs/artist/9ba95a2a-69a1-43df-a8fa-ea5bb8ca09ae.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Писма от бъдещето (Импресии за симфоничен оркестър, рок група и глас по мотиви на Рей Бредбъри и Кирил Аврамов)
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 0xcadef9a7923e0b413920f9ea81932f8be0b00af45c3221438b1746a28ba54019. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:44:40Z), 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/GBSMU1908210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ed38b1d384db7de9c732ed78e5c3437b049fb3fdd9af1c51d25c6ed79cac2e. 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/GBSMU1908211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db07dcde146d9e51f1629f1946f543fc97ec9a314dc8fa8999afc4c6adfdc0c. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/GBSMU1908217.