Luko may refer to: People Luko Biskup (born 1981), Croatian football player Luko Stulić (1772–1828), Ragusan scientist Luko Zore (1846–1906), Serbian philologist Places Luko, Kalinovik, Bosnia a
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 0x16c680281d88cda4b28d0a35db4601ae5c24c458d2ab039ade21c4caec940285. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05fed335-2e93-4f43-a40e-e980b9eab1a5.json and https://artists.proofprofile.net/proofs/artist/05fed335-2e93-4f43-a40e-e980b9eab1a5.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 0xdf0d71acaab86201f50d34b0797b4a590b81073d823b5d6d0a47a494f55acf93. 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/DKADG2100354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f9d1a0f5ba0150c7b60bbd31509ac6cff6b7d975d86f5f1f478191773fe997. 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/DKADG2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6c657a2eba1eb912abf3f331b64c0932e27e7c65978867f95fd10f9c976f07. 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/DKADG2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf308752c606b09d0ff0e841acdce1d92d530352f966146767ba87611667b488. 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/DKADG2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2565b8675cfa0b5db6404084514c53e667c10af0793e3bba05e7c7daba5cb4. 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/DKADG2200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5633904f4e01fb504ba4147e1901eff5610925b346b4413c9c382fd9797200c4. 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/DKADG2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bfcd72ebe22d88e30d4fa8f5ddd88b925877e93127fb5b297c771e06185e82. 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/DKADG2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b84f9cac651dc4a75c0e7b89dfb239ec0db15d8ef9ebddab1d6623cebf224c1. 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/DKADG2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfddc6f630db76f1b9cab34ab7aa7788b5e3341a1654443f4ce937f8b507334dd. 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/DKADG2200118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa775c0f9021b0aa1cfa93bba147cd697599c64f3cb3bced4b5f518ca087621. 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/DKADG2100267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef07fdf055d1b502e7455f3a80b1ef33011601cdb75601fef2eabf9163fea04. 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/DKADG2100752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10011a4c5066f54fc4e76e06ba8a6964bd245ca579cd547f9984d442564a1ff5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DKADG2300371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bdf1a5818e7c6e2a533d8b5c3914f0f0f80d943d98caf1434f6babd439a3ee. 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/DKADG2300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe4b5541ced72c24c909c0b539f7e238f7e284bb5685cf5bb4b10a24cb85736. 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/QZES62557523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15a72f72886d89b8b212673b83ef6909fc7e699f5c9890524bb365d342b8fe2. 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/QZES62557524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d468ddd19df79af28f2713a8c7f6491a17527d0ec878d352dd933d4d42ae87. 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/DKADG2500351.