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 0xf7ce007fd564f04603e9142934a447bdd6c31510a000f99ea7aaf7694a9fcfa0. 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/94f3370c-2178-4540-adf8-a519d24a48d1.json and https://artists.proofprofile.net/proofs/artist/94f3370c-2178-4540-adf8-a519d24a48d1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rachmaninov: 6 Morceaux, Op. 11: No. 1, Barcarolle
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 0x83d046ba4b9f64039647b0856f4cc4eb44a95ec892ac5912c1ffbef6ea92a30d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBAYC2302553.
Rachmaninov: 2 Pieces for Piano Six-Hands: No. 2, Romance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46888b13ab429b066ad0e8bead620a17361b20a8922af7dadec36bd268e69b6f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBAYC1600516.
Rachmaninov: 2 Pieces for Piano Six-Hands: No. 1, Waltz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb478205cce0e58a0542acdf43e6c16c6fca2664ae1135af83d0ce87ea17a7ba9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBAYC1600515.
Piano Concerto No. 1 in E Minor, Op. 11: Romanze: Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9df225caba12d278c11220d4658e573c9cabd1047399fed282766628ee3f0d0a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBARU9700301.