Arthur Côrtes Verocai (born June 17, 1945) is a Brazilian composer, singer, and producer. He is best known for his 1972 self-titled debut album which garnered a cult following during the 2000s in the
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 0xcf31f650a4f8fe01e2c837a04f002b303102d4efe6c1fc01cb68ce21ae60aad7. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9a90b9d-fdba-4dc7-953a-cb791ca1879a.json and https://artists.proofprofile.net/proofs/artist/f9a90b9d-fdba-4dc7-953a-cb791ca1879a.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 0x548b546b98481061470ca38f95513c0d1fa09f67b440f75309855f2fb31f2776. 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/BXBMG2400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffeefd7b310e42c20ef0c6da261171ed286243bffbf159b57dde77b5285c4d5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:59:01Z), 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/BXBMG2400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78641327a3d9f6eae0562448ddac6d644a1947592023be761b9a42a0dc210fe1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BXBMG2300825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7821142667999f899b3a5b5ecd95d70643fb321b4e9d30b53b7310a820571332. 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/BXBMG2300736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x548b546b98481061470ca38f95513c0d1fa09f67b440f75309855f2fb31f2776. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BXBMG2400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92f160767206712b462b4e92a8363e97e7bc64895119f063dee9ee3c6c05f66. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXSVC1600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03b4ec53cd765e1c996e161d35916550a7d3d86cfaa2c0c63ab77ce125fb75c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXSVC1600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c53d539e322ddd89bfca8b615a8321748e3c3dd033a4ca3d37b5d24928a4f57. 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/BXSVC1600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3389055131bd81f32fdd9ab785c3fed40019b4c2a6e9d79a35cf74d4924101. 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/BXSVC1600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c43ea34ebe14337fd6660362fca3efb4d46c5087c3c7eb9677ee1f6ecbae5e. 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/BXSVC1600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5d92ff6fed0e85fde870f7d62bb2394f2bd8ce439318ea5b29a69eea52ddc7. 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/BXSVC1600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe482e5c90a109f6d5b843c2157876a42700bc317f40ff470fc3d845a8ae8a38f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXSVC1600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ded5fb74bbd856ac7a43ed2ad1f7f9152996cec57eeb3ce629f195ac4887104. 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/BXSVC1600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cb771fc38726b59381f07ca58a405bf45d8c6b9fb944262807cc7cb4fe1543. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXSVC1600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x037186254c9d5ad35b0dfd805b408c88d8c149e9c4b257e11096b7ea9154fc3c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BXSVC1600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61cf1f060232ff75d3f05d86347ef3d9ce24c4ca0b1f12b56199b4092d3c88f. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T07:21:40Z), 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/BRZ6T1300010.