thumb|Nenad Bach Nenad N. Bach (born 1954) is a Croatian American recording artist, composer, performer, producer and peace activist. He has performed with a wide range of artists, including Luciano
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 0xba3c394975e9f0044e77ce14873a64f718c3866e951cc7588eddd215d79829d2. 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/90b4e060-6a48-495e-a534-8f741c14bc66.json and https://artists.proofprofile.net/proofs/artist/90b4e060-6a48-495e-a534-8f741c14bc66.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
I Love Ping Pong (If I Had Another Life)
World Peace in One Hour (live in Lancaster)
Pavarotti & Friends Together For The Children Of Bosnia
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 0xe402fd036d14da336f471b9d21b188b4a2adf794a87ce44f130b7b7c03684196. 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/GBF079541203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a11eb8f8f46706301411ade44597d0a7d005f615bb6904c4b8d2aca29e2e49. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBF079541216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe402fd036d14da336f471b9d21b188b4a2adf794a87ce44f130b7b7c03684196. 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/GBF079541203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a11eb8f8f46706301411ade44597d0a7d005f615bb6904c4b8d2aca29e2e49. 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/GBF079541216.