Zonta can refer to: Surname María Zonta (born 1989), Argentine volleyball player Peter Žonta (born 1979), Slovenian ski jumper Ricardo Zonta (born 1976), Brazilian racing driver Other uses Zonta (Re
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e853980c42a50af23533374134f203c9f526b4cfc824c232c248670f24b3be0. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cac0d86-a1b4-4349-8369-0793b29344b2.json and https://artists.proofprofile.net/proofs/artist/9cac0d86-a1b4-4349-8369-0793b29344b2.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ff4fbcae48ca35a7d6071a79d3a98cae426b8491af06baae2e4c1d062a785c. 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/ITOGB2400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615e82a94f7e0a9843a1f5f27e924be21261780f06071db010c5e9fb33c04469. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITOGB2400073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c6557616b0abde2127b130f4f8d351d87b54041f9e5dc27194a098a0ee1fd8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITOGB2400074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f894c3bc1b0eec0d04059bbf1939dd7a3635cc085329860e8555a7a7d2c2904. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/ITOGB2400075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf054a8bedcf5bc81b5183ce3089250546bb0159f6139c027ef00dd6ce634355b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITOGB2400076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1c0c090ae4006ba50ec59beada6bc6f0e73741029b7c1d1319fe0985ab3aa7. 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/ITOGB2400077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8c2cd7168bed4f194a9ae17b45981781c822f067b88acbd1b2447b286d2675. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ITOGB2400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2dc6f99f38a0ad4c4b22ed5ab9cc528bfa8b09f574c19f0813baf405a4f4cb. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ITOGB2400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c44b4aaa73ba776bf948f85895b48e02d5ebd66875101f2795f21ba51662cd. 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/ITOGB2400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d6063e0dfa5ab682f75e046fc9f7ba283c2097c4c9bbe8aea44a1f397e9755. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ITOGB2400081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7c55858113614ef0f3e4a6fb8427c7e4b37a28f5e21dffefb955fcc6541d7a. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/ITOGB2400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4fbf6b41870af2628778169a30ff797686613bf4abbcfcd8e5bb7633961dd0. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ITOGB2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a33a4c13c4c4525b524e18592088d6910dd1b9edb4fd938514bf9a05b29fc60. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/ITJA21600376.