Vanzo is a surname. Notable people with the surname include: Alain Vanzo (1928–2002), French opera singer and composer Anna Kriebel Vanzo (1881–1926), Norwegian opera singer Dorino Vanzo (born 1950),
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 0x7b1032b2b60b3968aa373d33c9f9bbbd47558b4052c36ef53837dbbc55d9efb2. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4efa5ba7-e88e-461e-b7f2-50e199800952.json and https://artists.proofprofile.net/proofs/artist/4efa5ba7-e88e-461e-b7f2-50e199800952.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x62b63ff3d3bed9505c5a7308260e3fb412bd3ea16e4e33d63516b1c4498b4d7d. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:09:44Z), 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/FR9LT1800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dfa1c5f71662b6f68bb0aaddd7648eb84e6c0aff21332e0668e41fd97a29f9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FR39W2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c617a8dcf1b110bd31c56adc37d0ca4d6408cb84426f8a3458ee4cd2b90607. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:31:12Z), 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/DGA0H2458248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee92a00848e462c3a6a70c1bc7ad23821f005a8d7ccc68bab8fecb9000471735. 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/QZHZ62032117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd1f2cd4efc937025f30915a7e639bbe8855664e2c02daa30f459025fc0b682. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRPGB2531640.