thumb|Maestro Riccardo Eugenio Drigo. Saint Petersburg, 1892 Riccardo Drigo (; 30 June 1846 – 1 October 1930) was an Italian composer of ballet music and Italian opera, a theatrical conductor, and a
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 0x197707fe9d7b9b9693e80c86f6fd4600cfc3122cd5f48d58fbe457821a9d9ac2. 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/f071058b-edd1-4175-a51e-254549dc6707.json and https://artists.proofprofile.net/proofs/artist/f071058b-edd1-4175-a51e-254549dc6707.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ballet Class Music from New York City: Music from Company Class, Vol. 2
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 0x37c3705777bfab802b45549c384f06de6a84e73b921f2dda3a8b9b9e91e90fbd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USE831579479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61784e914a9cc8da3986c6a52f305e96c64eae9dd94b20b8224a8b25ffc9b9bc. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:05:12Z), 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/USE831579477.