Matko Šašek, also known as Koolade is a Croatian hip-hop, electronic, and urban music producer. Born in Zagreb in the late 1970s, he began his music career in the late 1990s. Along with other members
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 0x5eca9130892446af828ff6219c30b1758e925cc46ebf64556ccd2cd57285c528. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5fdb053c-dbc5-4b24-81f3-31b316adcddf.json and https://artists.proofprofile.net/proofs/artist/5fdb053c-dbc5-4b24-81f3-31b316adcddf.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 0x8a9b51bcda3e13c5cd923e2033f4b089053408ff79709ba431d412aea9c42f8b. 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/USLD90802327.
Get Addicted (feat. J-Ro from tha Alkaholiks)
Love Crazy (feat. Masta Ace & Stricklin)
Turntable Fellowship (feat. Tone Tuoro, Phat Phillie, DJ Borka, Shorty P, A Skitzo & DJ Raid)
Say Nothing (feat. Rah Digga, Sean Price, Tony Touch)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569380faae27cce17f1b63acb239af8136b58d2075933f911c0df0b87638bda1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NOAPI1793857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1350c111ad135ab1caf851d649cd70716ef00ed92b065362a3e973ad39c9ea. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM42K1818277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e146388f363e1ec0b7758f5c628fcf7b0441ab8ea18735bae0d0b407b62dde. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/HRA262280030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e6e573e151a9ec99891d0cb23af4cfc4d48b66221b05c2670aecc273816857. 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/DEZC62441132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa020b7120d2b9c8b987912ce972eecedc174564c85885b3ba8910c6488bd0071. 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/DEZC62437962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7ea6eb6dc234aa2b6fb32e1034b9024cafdf8c16013fdfa6ab17129d5c2914. 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/DEZC62435853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445b178c2c666c8f94a6d7eea572d9c4d6d627eeb0b087db1c019314b1266deb. 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/DEQ022003206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cfe23eacc9799401ba9b9f5e265d4ace4b78a7fc60d4d21717317117cf81a7. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEZC62384180.
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
More Bounce Presents: Feeding U New Knocks Vol.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894f0f0034936b831ddea29b29589f43f1ccd89b843d42cda604f1192e184c13. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBSMU5793217.