Grgo Šipek (born on 22 November 1995), known professionally as Grše, is a Croatian musician and rapper. Early life Šipek was born and raised in Trilj where he spent most of his life. He currently res
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 0x0d58c70e59a3db10dae18d65e36aa51912245923d6a17880fc577e2bf9dc4655. 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/0ff7ae70-42e1-497a-abab-0f13c1b57311.json and https://artists.proofprofile.net/proofs/artist/0ff7ae70-42e1-497a-abab-0f13c1b57311.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 0x0e39d06a67a7ca7068497d7316415f5d475ed60c9cd489c9692e88f63aec0c8f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US83Z1926820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318f77391f4a69fa4d83fe5d78bd3bae5756c9e49a0b45eaddd8d00c86778d07. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:48:11Z), 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/US83Z1926821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8484d78fad679de39b1419957e81858807e479b89c0913957bf53d973ac006. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US83Z1926823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f3ef7400d5fae17dabb88bf2598634f15aa3147b15e4c2608fb3ed61412e18. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:46:07Z), 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/QZK6M1911219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08af2f12e47b13a0f5c25a26aa9f12d36a1e5eb28a1ebacfe80cbf4d017af33. 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/QZFZ62086552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9a17e00a017fa51078e2c494af8d68693de9e90f4b79e3d296fc227cbc6344. 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/HRA8C2300126.