YU Grupa (trans. YU Group) is a Serbian and former Yugoslav rock band. A pioneer in combining rock music with the elements of traditional Balkan music, YU Grupa is credited with being the longest-last
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 0x0ae3b129e36f850c308ee13e291d654b6aa00ecae4f10c9bc0068b0ce924f9a6. 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/5b9e6e01-6dd2-446d-9d20-c2457f878267.json and https://artists.proofprofile.net/proofs/artist/5b9e6e01-6dd2-446d-9d20-c2457f878267.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 0xa532b5efe8d709a8913c9f517933d6386068851541dbc7b1a85e2569caf0316c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/HRA047361347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505ba5d351d9e65ae6981f85c5becb6fc51e19276132010ee9a3970eab304e59. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/HRA047361349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d58ba4d36beb363e9a90ac3b9baea72e0dda5a13059f767fbe8ef5a1a00220. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/HRA047361354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed330d14fe5efbefc8a97ffadb0f6fc7612f6c3d956d5cb2f045b4c26e7f6553. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/HRA047261340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf071654fcab2cf23ff57565a3fd312035654b1fe0c6b5cf7570414fc36a25c6c. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/RSA042000455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2336120f9ba6faa7715ec806476157a0cc9c62afb21a80f0c0d2ff2b8a43421. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/RSA042000470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a380210d5f1f792bcfa0abf8fe569cdf28e5ca29fb6e240837176b67cc78a13. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/RSA042000471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c56cc2bc9c4c96934e8d69107cf94412c8ac047f65235f17e8040d3b50dde0. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/RSA042000473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc871bc3c0dd74f1bfb0ac04b301a57e224f61c1bba13a7ead1605e3a8eaddd2f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/RSA042000474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc504f309123d0e5619df9eeb01722812b33b90a6ab333a23fd46be638f53d3a. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/RSA042000484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f64290d38402fa64ce6d0b995bd948a8bf82283b617dee9774b475aa402fc7. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/RSA042000496.
Tri Boje Zvuka (Live at RTS Studio 8, 2015)
Tri boje zvuka (Live at RTS Studio 8, 2015)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248b0bf99394834e064530590fb71fcb62d660341a05c8509ace178c0df0bd27. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/RSA041600408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7caeb197ed3b650e834e5ad0934f6c98dfdb085f1d582dd9ca92e2bcbcd9e314. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/RSA041600413.
Rokenrol zauvek (Beogradski sajam, Live 2022)
Više od 50 godina čistog rokenrola - LIVE (Beograd 2022) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4aaac28ba73ea6fb27e1588e3c9c6dd1f9457e39b17e7a162153452bdb94bdd. 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/HRA048717232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4a85165a960e4d8948c56f3f169a12b9aa3680f6d52794c1945464433c12d0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/HRA048717234.