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 0xeb84d7bd6b4e29e30d2fad5ebd250787ef851b1bec0a29900c0dca073d1acef0. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2018f1f-bc0d-4e0c-819b-20253bcb7804.json and https://artists.proofprofile.net/proofs/artist/d2018f1f-bc0d-4e0c-819b-20253bcb7804.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Il Cassetto Segreto (Original Motion Picture Soundtrack)
Variazione Nr.1 sul tema del quintetto per pianoforte e archi - Op.667 di Franz Schubert
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 0x929f9dbef2bac176afa1d0a0256e009b93b63e607d0b8adc6fa089b232731633. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ITM162417192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54402022923777e2f9120098de99bc5d2b1f08189bf5115606e53668056503f. 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/ITM162417193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6ee15010641d924bd1d79bebcee8c8c8027c3eed119494a13a3fc1965246eb2. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:05:20Z), 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/ITM162417197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3078df5e9b44fefd396940a66a4ba98065481f3707baa7f9eb5f7ec03e666279. 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/ITM162417206.