Clima (English: 'Climate') was a cultural magazine published in São Paulo, Brazil. Ismail Xavier argues that although it existed for a brief period from 1941 to 1944, the magazine significantly influe
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 0xa99a20fe07fbf0db6065362604cc75621e804e0fe6521999c231db1e6782a96e. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57bf46cd-8c47-4af3-9464-42416f1dc003.json and https://artists.proofprofile.net/proofs/artist/57bf46cd-8c47-4af3-9464-42416f1dc003.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 0xb64e1d719e95ab1003df81686f4bf63b544c6b3ad1d00810b7187a89a16bd894. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BXR2A2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6579b8b2390dcff6120385c1a8a34747781ea73367f990884e7fe116a4e5680d. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/BXR2A2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1749eba7630ac8fd53c4263f0f3aff256adcccb844c2ac2fc3e215538c6c1512. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/BXR2A2500003.
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 0x11c425297fed4b8e753e63ba14184088d07c9af433e79f2edbb84ba727820501. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/BXR2A2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671540dc27a66186c9fbed6e613dd02f0224b811c9a22b87d4350bd1bda0a777. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/BXR2A2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1326c1985c1294e45429072c955c38b49e128feac37621ba02afcf20f54eca17. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/BXR2A2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60eba19e2d1f9493d59e39b32b75d0fd1b98ceb5a5fa85a163aa916d3e40fabc. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/BXR2A2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07404f5a57370b6964219698683023b1eec09f4f79af52deb1cd17f0207413a. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/BXR2A2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5667c803707585de7010bb6dbdbc7a2b12ca8811f2e2127a75cc05347d53c860. 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/US7VG1515547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1113548eabee58367070b522cbaa2f425ddb8a1fd81b252e85743e3fdb6eec18. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/US7VG1515544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141e4ff279b35c55e28a46c42ba1d93e49e860b2a55906f75a2ecd70a4813aaf. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US7VG1515552.
O Último Carnaval de Nossas Vidas: A Espetacular Charanga do França
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ead310e9f8f8ba097a641a9ca8dcc12c3c3c446ce72718fcf70c2e092726bb. 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/BRHXF1500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e429a224990a0035baa0d7f37ab4a1db60bf9b9fd812596451090711c41dd8. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/US7VG1515543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad45fa00c771ea2b3efff510bab300cda1994ff8d770a4f2815b8b844e8f48eb. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/US7VG1515551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419dc770f0df7cea453a87025750c71b12c116015809a0a50bb2eef4c862192c. 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/US7VG1515553.