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 0x61a798047137ed22875d6fa1abafbb12d00bc240c5a8fc8f9a6ee8759d07f72c. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e22b69e8-57cd-4b06-a2f1-6fecb2b8c2ef.json and https://artists.proofprofile.net/proofs/artist/e22b69e8-57cd-4b06-a2f1-6fecb2b8c2ef.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mascagni: Cavalleria rusticana: No. 7, Intermezzo (Orchestral Interlude)
The Classic Experience - 135 of the greatest classical tracks
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 0xbc99c2d9f6cbf767077d7d7a2b91774b71f5e379104d62fa1ac933b9190798ad. 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/GBAYD8800196.
Offenbach: Les Contes d'Hoffmann, Act 4: No. 13, Barcarolle "Belle nuit, ô nuit d'amour" (Orchestral Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486ba16adef91717dbb740f8723423e12f94bcadcce7949ae7f901af2d2c7a69. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAYD0700447.