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 0xcbf72e637819544fef8c34c58cdf9e57c774de13aea8f91cab7e6fe7fbafb639. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fc67a58e-38eb-4924-834c-e798cc9e9bbc.json and https://artists.proofprofile.net/proofs/artist/fc67a58e-38eb-4924-834c-e798cc9e9bbc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Terre et cendres (Bande originale du film de Atiq Rahimi)
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 0xdabad16f5a2ecf3b305ca7d089a6e681cd3911a157d55c122a603c5376da75bf. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FRZ170410210.
Zar-Afshan (Danse traditionnelle, Cycle 78)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f0a3ee5333a6c00f154505c561d49ceaefed1902ceb7b47f0c109d47a766e8. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:56:19Z), 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/FRZ170410230.
Delkash (Danse traditionnelle, Cycle 24)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d71a6ea40c90d0eb7add45218a2dc8c0d5264ff672a91ce4e8a6e7f845e6fa. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FRZ170410240.
Chants sacrés kurdes / Rubab Raga / Afghanistan : Sazenda