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 0x705a3eb2623155163cdbdae1b5865d6b9142380daa34cb49c7fec3f346b5f233. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3b45e6a5-cea1-48bf-8f92-7b8770d9727f.json and https://artists.proofprofile.net/proofs/artist/3b45e6a5-cea1-48bf-8f92-7b8770d9727f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Wonderful Chill Out Music: Beach House 2023, Ibiza Summer Mix, Lounge Cocktail Bar & Café
Buda Bar Chillout: Melhor Música de Lounge, 30 Batidas Quentes para Relaxar e Festa, Ibiza Buda Grooves
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 0xa5443ff459dc51b403411597a6e702ca2ddd6326c7dd986d72036462e4493035. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:28:36Z), 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/PLS921668442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612669a7fe5a389a380d84d97f6a8f849ad9fd2c3d0141440765739765220a35. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/PLS921668443.