Marko Tolja (born 3 July 1984) is a Croatian singer. Career 1984–2005: Early life and education Marko Tolja was born on 3 July 1984 in Rijeka to Koraljka and Darko Tolja. Tolja gained his first music
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 0x942e668f68eee36bb79026a3115d00b9ffa3a1eac059a5bdb8834520081051b5. 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/20bba52a-4270-41c9-a1ce-2bf996cf0db4.json and https://artists.proofprofile.net/proofs/artist/20bba52a-4270-41c9-a1ce-2bf996cf0db4.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 0x6b0f1deb12aae84a7c1bb8b0443281a0f9f18ab3d6482af49ceb40feb68dfe17. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/HRA100702341.
Back To Basics (Mike Rizzo & Lenny B Remix)
Back To Basics (Back To The Club Remixes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba935f5e998eb6438336182e92510600bda6f93a4f3f75cf552c5350b194d2f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/HRA101406526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd813263f24a50c56d91aabd9936f20daeea0b7613bef40b3242548c9a84c2935. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HRA101406527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a52594703e3d49da69bbcef4fe02f3d41a5b1edff69cb15f6777469d59885b4. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/HRA101406528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299eb2fbdb8e10ace90bbcc49db90968056594daaf02573a28e5774d5bef32c2. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/HRA101406533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeceb01fe6e19f1d6fe11d17c3b44ef683e46d9e8749b64ea47a8c87f4242e434. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HRA101908147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63a60993d6ecc7b595915e5873ee9678bdd33ce1a613b0ad807be5bc73327ff. 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/HRA101908593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5562cf1cd01e52b0d07a47ea31b1e265b3725675b661727a90019eb0916f241d. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/HRA102410468.
Od Božića Do Božića - 50 Najljepših Pjesama
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d18091a76c53dd68e3256cb83b33ad549a6ce9ca64d92100f3b52afb3cb4a58. 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/HRA042095992.