Aleksandar "Sandi" Cenov (born 17 July 1968), also known simply as Sandi, is Croatian pop singer who was popular in the 1990s. His first album was released in 1992. In the 2005 elections for Zagreb C
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 0x8bf1e5afbe842e5870a3a394ac82987924dd44a0fe2d0ccae8cdea4dc9361952. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6cc738e0-269b-42bc-9be5-6a212314a170.json and https://artists.proofprofile.net/proofs/artist/6cc738e0-269b-42bc-9be5-6a212314a170.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 0xa60942f47af1c84f415b04fe45bb9a7b75ec3ed1479f4c2f0e2d2675aa80b91a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/HRA231200155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9a1f6190cba05a3bae526e46a16be4c5f376d389e3bf4bd3ca75661c28cf93. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/HRA231100054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242279560e2e8a165db705f43e06daf35d24efa6874dc6d4c191e67884cdf330. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/HRA231100064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9b2083addeba711ef8299bba7c40179aba4516d0d89bb21bd840dae3b1ca64. 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/RSA221835391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdeaee424f267850ee5f2ade08fe609f77deb7a3c1ab8a23a705b6503ccc9f1. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/RSA221835399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab646802a88c750be1764f0ead0a2e1997847da3d8d01138bb3c95a44440eee. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/HRA231200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f68eec03fb226b7b8f2e84e751b8d1cd322f5850a4704fe1dbd51b7774fbe0e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/HRA231500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba90ed65edae583cdb35d3460b51c9e6d208ce51dc8f016561ba2a2777d10f9a. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/HRA231400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa093ced56124c5b7447057f46b7700714b280f11ba5fd2526484df8da9298bf7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/HRA231700069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f4f18374d576eda1fa448844f9ff215a16c20472bc2ca28bc0d225aef022485. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HRA232000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa093ced56124c5b7447057f46b7700714b280f11ba5fd2526484df8da9298bf7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/HRA231700069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3740df98cce7629ab1d3e03ad5b0d5954836d769bedc87d150d0700c629ed549. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HRA042400842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c882791116961c2f830d80c96d2d8877b56af7a7a4339a11a6f70c9738fe9e5. 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/DGA0T2420986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d505686861b02c71b82bb8c439ef07ee528f93b92df3805d304dcde336136b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HRA231900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66045e56e6303d9857157db965f723fe26506c490b79b4989ca058734a632747. 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/HRA042500245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eccca1e9cce57ee5f44eda3801e9350b0d5d9c56f1f6ccc132ad1efd42e537f. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/HRA042500183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3740df98cce7629ab1d3e03ad5b0d5954836d769bedc87d150d0700c629ed549. 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/HRA042400842.