Ivan Vilela (born August 28, 1962 in Itajubá, Minas Gerais) is a Brazilian composer, arranger, researcher, teacher and viola caipira player. Ivan Vilela is currently a professor at the ECA - School of
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 0x384740ec9e09360950afe93d0679dc9d95bb9003ba2b0230e3530f054bd14aa7. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b55c008a-cbf6-44c6-ae7a-6db5adf13e3f.json and https://artists.proofprofile.net/proofs/artist/b55c008a-cbf6-44c6-ae7a-6db5adf13e3f.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 0x13e0678d6e2041facda5fc4271bdbab5c7d14024ae21c46b797f1221aa0797ff. 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/BRIVT2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e8306baa276ed5a70c0719976637688d780f94260a140d2f443573b287d102. 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/BXNNU1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1134b6462ace3802c151aa120accded419ba44fe3bb2de794d93b40b2c844710. 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/BXNNU1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb6668f4d0f6fd1dbdbfaf76424adeff821ffc99a2b390caa79306792724660. 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/BXNNU1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7410279859976b16f596e52cfa83e593a5dc4d5cb85ece79b8da3fb8cd1e32. 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/BXNNU1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe173ba434f5efc083942b918890c1af434f6c2453cef4a98eb1383d73fd83b31. 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/BRIVT1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cd0572cc124e5c7cf8e6236dbb88e03a33979111f74cda152eb495a71a628d. 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/BRIVT1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c401ffde0775d7d02d6fbd917dc47726abbe8911a0302d4c6618c1f4dd3ce32. 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/BRIVT0300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f727414a48bd8314a49be02d4f6c5ddcdb3f5d18bb014ffc46c9e0f49e8bfa. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T16:31:36Z), 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/BRIVT0300002.