Marian Cozma (8 September 1982 – 8 February 2009) was a Romanian handball player. He was born in Tei, Bucharest and died in Veszprém, Hungary after being attacked and stabbed in a nightclub fight. Dur
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 0x7dc7d64fb1da14693d9cda3ff25b4ba8909af1dc7433e9784a20dce44822b11c. 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/4ebe24eb-aa29-46e3-bc7b-ecc6214c2af3.json and https://artists.proofprofile.net/proofs/artist/4ebe24eb-aa29-46e3-bc7b-ecc6214c2af3.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 0x3f258b97e8d7bdb11fc2afd22e3557742f4e6d55a61d2574ed7fe5de73eb6385. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:44:26Z), 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/TCAHG2331281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3b045686fcfc4b84611a69a3a17f665ff93248d0fb69750df2b8fc99670e2a. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCAHG2301595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e82b3b4d93291dcb9a3c446627ab9f29da6d8672b5857e3e925e7259a3da84. 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/FR59R1897901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dcd17a81a6f544dbcf5683ff4165b81f0c88a6bf50b1c4147031540d429b3b. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR59R1897902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727b63b3b22d30ecb9da4061ca2c9dad65d3f1d4b4d48469201fea19c15ebd0a. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/FR10S1928656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a7435d2c4fd28dc3b4a543eefd7b43e48c12c1225d1ec37807191f7f4f9e6e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR2X41950669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6e2051e6be6093a3900a498b236cc4bf5e9a2d700f2e1a3ff9b732945a8707. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX202020230.