Los Piojos (Spanish: The Lice) is an Argentine rock band. Extremely popular, it became one of the seminal bands of the 1990s Argentine music scene. Unlike most suburban outfits, however, their style
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 0x9a8a458a7fbd52b8b4f1091e0f42134890643712b07e69de4d5fc5f238a52cf6. 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/b364a166-6691-43f2-9a66-418b94115c54.json and https://artists.proofprofile.net/proofs/artist/b364a166-6691-43f2-9a66-418b94115c54.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 0x615b593f24e26cb3c82462fe3b3a4bb041e47213822cb018406ecb5250f2012a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARG601100116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfb4f139debfab796222631877b062feaf49c764d7a206c77f099f1d61d47cd. 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/AR3691900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e6c166bed1c48b1ca478bb3c70089905d3e2e04c0aa6c7376db2603881f74e. 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/AR3691900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5941a1973a5564d47921dd91a7e6f64ed5485208cce747d6bb0a047e4888629. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AR3691900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a21de7d7e8faa22dcbcf0321b08e3edc1d9cf2975b6a7402d3059d9cc73d7a2. 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/AR3691900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f6d58a1d2754de7341a8480a03048d52f5d10fecfdb22befb4a23ce6e6aa5c. 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/AR3691900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04cb14dc5757644b55c651122121a21a48e177fee06bd40e6fe93f46b9f08f8. 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/AR3691900050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54269b66616bcf338edf820673c7de1b2a71fa341647ba1837cf5ab77f98709. 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/AR3691900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44edc9b2e78b72a261ea81f0cf427889a5720e91ba524cb22525f3a6d67e47b0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AR3691900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bedb6b2682d66d1170534937255d54d564153c817a43542cd88bfee59bec55. 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/AR3691900053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69264e5e68db3e89284a2b2e7c002efb6828c9c9f0707439f4e0180fcfb85cd4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AR3691900054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2e83bd3f88ae756cd09747b23fa1188d7ff87d14f15c0be759555e95f18d10. 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/AR3691900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1717946471eb3da565d415bfdc5653ae9e2238b862d852ba9ec7f0f5855245bf. 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/AR3691900056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf213f212336f6f662bda611667e7e3b12cbe988c57bc59a5cb46b6efa55e8824. 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/AR3691900057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fd5484b33e1e391a44c33dbe511b4dd6268bb04c780b64af258c3fc18e82b7. 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/US6R21218944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfff91d351f22b96b8305803c76a0d50960edf5926f6ade983f2998dd7977207. 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/ARF470600055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda4617aee71824109e475afd6828f4b445f7c09d43b889edb48e3436a05376b6. 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/ARCH20601007.