Lojzo (also LOJZO) is a folk music group from Bratislava, Slovakia. It was formed in 1982 in Czechoslovakia by Marián Kochanský. The name is a backronym for "Ľudový Orchester Jednoduchej Zábavy Obyvat
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 0xc7d03e9453827645d512a6877f2c90b97997140afabb1db3d78b3be8931664ad. 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/713ae005-cf87-4d20-89ff-bb9f40298824.json and https://artists.proofprofile.net/proofs/artist/713ae005-cf87-4d20-89ff-bb9f40298824.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 0x69201f88fd77e0232290e920d9a358779270e327a337b213570228eef14ee669. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SKA128568801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c872e331740f76aea2a9a14acef9779d22ccdbce0c90212bda1e7344b37e5f. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/SKA128568802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8042cabb89290274e1e11ffc070105e0d4645cc52cc4999c2af394e38d2f72. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SKA128568803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e564ac446c9ef62b58d4b4ae87c6729556bba1e4aa23badd088793587289e1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/SKA128568806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d4359cbb3642d031e5acfdd1d5e7579b6c8d81900ed424702cf7aa31eb68b3. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/SKA128568807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01931945e1a79d362d1f551359e8099e8da1ff8e391fb7dbb7dc2f7938db363f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SKA128568809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d0092858d776a15e212c103ed8022d30ff77e2925b6737556972eb2a3fa603. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/SKA128568813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e17429f3889a1314d3ea3feb04951f41ddbd6418d451c0f67920ba42adfc47. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/SKA129626804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06cbfa6140386762ee900b7112ff1e62f90a7f00eba3138c808ddad1643664ba. 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/SKA129626808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bf740ee6a5319cd99f72fff5c352107f3935cd3f5cf7167b893308d832dae8. 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/SKA129626809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7eb504cea3a763f046c67155b2923397fe03bfee70272e4a40d2d8fb7134c0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SKA129626801.
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 0xa95087b4e271c19e5d9856a3bedbb5950c0562558df39882c97d570042bdafee. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/SKA129626802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717df98d98bb8820225df128990e831249b38550f01d1e72d9f5f18a67bb7c70. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/SKA129626803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc0a55775d7748dfff1c24cb2b92175cda8d3ab6c155ebf55cbe7793f9a8ab4. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/SKA129626805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ace5bc5ccfab5c0b9e6cbc570a120cd408f15f86d41fd99b4e9f53e2f902f2. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/SKA129626807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb94a6bf2b1ed6f6a69eca9742852714d035c77b9d9c08109107497bcfe7dee. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SKA129626811.