Cukier is a Polish surname meaning sugar. Notable people with the surname include: Aniela Cukier (1900–1944), Polish painter Heni Ozi Cukier, Brazilian political scientist, professor, author, and p
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 0x8c0ed36435b24263b9a7491184eb199195d6f13d500cbaf9c1cb5b8b59645dde. 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/57272878-119b-45e5-ac13-202d797e750a.json and https://artists.proofprofile.net/proofs/artist/57272878-119b-45e5-ac13-202d797e750a.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 0x020d4609182e6d645e54bfe118ea8b6569078d4134404670bb6d2d18189f9ae5. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZFZ41907007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5c69a6e402d5a39c87010ee24d86561161c0eef6e7c2326be4b9b0d7aaa9cc. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:47:25Z), 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/QZFZ41907008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282578b67d7fb1f3e41aab6a00bb66a522ce5d8a83df54df2ba16538d0ad77c2. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZFZ41907009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a274c532cd739111fcdca01de73e6368e0c0fa7efaa7b51dc399f9af850908e. 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/QZFZ41907012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8003194f2a1ee7d7bfe3060c8db5fceaf46d6fd5e2bcfc9e75e7a8b0fc9522. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:04:23Z), 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/QZES62032397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e2e6ca96a3f39ad6a335f6d908bee5d17b095de9f739628180f18a3e58e0bb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZDA82020902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa105c22887768bf560738acb96625ba05dddff95481a3417fae6231861b9a4a4. 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/QZK6N2058955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1eee67096368a71d36c310b79d04f3dcbabd1314c46a273d7ef3c93f70eef8. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:32:06Z), 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/PLC062372324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c999a4d5568d83958dda41fc80953818ec3ddba5ed928d6ffcb29d8732eb85. 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/PLC062372326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9720eb221aeda09c8cbecd23ccc79057a543c813b503b4d6a2aee6aaeb530467. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:11:21Z), 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/PLC062366669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6750a3a4df180cb660089863200e247c191f774a29ddfc1d8e7da2253cafff77. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/PLC062372330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552eec477f7155eac18a7d2d91ef6d1c6055ab2c4b76cec80a5bfbb6c705f232. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:59:29Z), 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/PLC062370872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc9147f5f298513790c6152c7300126141bcd58b58d4279979f512f49927f02. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:45:50Z), 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/PLC062515547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862289db2dfcccc59700894aabeaae9d84ec16ecfa663761aed67c2bee62b32e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/PLC062533333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d290a9f4da19ca12c5bace1a3e7621588a0a1900fd2b44b2c150e5e4a378cb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PLC062537730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64dc93f40b0f1beac7ce40efaafa528a63ffedc9813b1ec1979a4dafd9956e37. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLC062247110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc440d24230691ead8a44e67a43eb031b82859b473df14130e1d313c117bfce0d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRX202118533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba8d183b3bfa665d11e79f097b86940b8ca4845e470622216f60d4326f63243. 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/PL15N2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088d1efec8952a815a02a1dd841bca135f59fb36b7f157264eada5dc016451e4. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/PL15N2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe633b749614fb619241ff4ec83d510591d11defea2f4384f89fedf7adf11ed5f. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/PL37A2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba8d183b3bfa665d11e79f097b86940b8ca4845e470622216f60d4326f63243. 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/PL15N2100009.