Vinko Coce (22 December 1954 – 26 October 2013) was a prominent Croatian opera and pop singer. He is considered one of his generation's greatest representatives of Croatian music. Biography Coce was
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 0xcb2830d812fc6739b369880f33f7134f7bb298e724688261c2ab2b5f1a2c6d5b. 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/7b166dc3-8b5f-4544-9f30-31cbe93b5bef.json and https://artists.proofprofile.net/proofs/artist/7b166dc3-8b5f-4544-9f30-31cbe93b5bef.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 0xd4086e384c2deec1f0a28b4d1525c6b7037edb6639c2ca608841a15733f13533. 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/HRA040644907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c8d5dfd06e763f90af3db57ea67379636762a8dd4156d880c4b9931c38b453. 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/HRA040635768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90f34fe6f86a7d388566c5b9c7495553c40b4bc55a4e1443d010e35be60c7ca2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HRA040344901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b37b360d370da4573f8b03fa5db2891604c15c2b3aec8470195cfa81c3c6b79. 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/HRA049837473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e96161318ae965af28f3c1862c6730561f108d4d0fe5d95f5ffbecc148b2bdb. 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/HRA040639802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9335708167b00724b39ce5bd5e58fa6ddf06f3646c6e43e70e72615d9a28b66b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HRA049837470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea85b4f0269ab52ab11c45aabdd1c643d691bfc3756aa9cfc537c564f9b83d87. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HRA040629222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78073748cae5bd3b03f442b9fa02b52ba5e60daa43d1679a442efa05473a3cd. 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/HRA040637476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799c74284b2f6abc0763bb5109af583431120f86149d8e7426dd3e7bbfc72d42. 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/HRA049531334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c01078c6f9fc1dab6ebb4d89b23943519bd68686a4e9468666fe9745fd92f6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HRA040637477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bda09bb1e2b3a36ed77f49f5eac964daa290a5a51f0919a007fea95c37a9b07. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/HRA040344902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d44ddd60b809a68faa0a65d7a22ab17ba4c3fe7a3793108216bcd2d4db6b35. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HRB901400689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe44ebe717ff97523a89e8a0f1c53718b02a44ebdbcd5a3d0f4b9ab499eda2b3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HRA041165461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206f1dd3b73eff880e6fc7ed44c9da7028747226568de839d916b0f059d0b9e2. 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/HRA049329218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd7192dcff29848fcac8c01b96bb1c9600243f526a2bbdc70c60f16c21e4a83. 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/HRA040631822.
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 0x349c6801ef469e67e70bd7915c7f82ee97360c953c146c1bcf3900838d48bd94. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/HRA040629223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x077bdc2a4c05462b43296e65a3dfbff3f51350b0f67913e46411e19a8c25c321. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/HRA040544906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d0630fd018b70674a346449e803bc107fcbb7a05a0a9e30f6288b2eaaaec35. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HRA040344903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd471ef390d4b9b701ec5ad35e9fafdfa3cfb99f137901e81b4b8cb977f9e5df2. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/HRA049329221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00dd81ad4fa6d7459c94961bb540afbd62849c46c5a4b6e78ac868224da3a25. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HRA040635283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7650117c00f493454944e45a377cff29fa65452eef61995bb960f6162c7902e8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFYY2059214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a10052747de8027caad274e391ba03a5e45169b8fd0e0847876f3694db67773. 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/HRA260913816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db6da5fa0732047d7e53bb3f41b3f0b48f328690d1f55193e39a0265bee17bd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HRA261321801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de836cd1864826242a84765f7c51fba7e9e8de66e1df7f7e515cc79b0260395. 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/HRA261423607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6344b8295600d7003080f179e771b1596763f3f2a401f15d1c4a6976f18bc1. 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/HRA260812816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67956272837e5cece94cd0b0dc82daa6b3352b04496cd12838d363c271e75d58. 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/HRA260812807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5c44cf8445f6f5edcfa11e0281ded4d626dc053f28770db4fa9c00f4f038df9. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/HRA040648424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7269c527f2a0d4b1bebbd64dfb7456598d0f640a759cec76eed9035952a5780. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/HRA260915007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05583349d07eefd4e306f48cd26202421a6c8511ca46e7a69df99c64ad40fee4. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/HRA260812808.