Zenaida Gourievna Booyakovitch (1924 – 18 December 2016), known as Zuka, was an American artist of Russian descent who lived and worked in Paris. She was awarded Chevalier of L'ordre des Arts et des L
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 0xd61644fd58c44bf8bfe0c608e35520957205d925396db40fc45908c1d0cf55f5. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/99116bae-686f-41df-b198-df408322df65.json and https://artists.proofprofile.net/proofs/artist/99116bae-686f-41df-b198-df408322df65.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Llego a la Disco Vestida de Jordan (Cover)
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 0x932e7b9476c079809a53c4e3ae3b3343a890f6dbef68be35c2beb2146a56793b. 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/QZQAY2220342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e231041681a9320aaf329cd1e6b62fa135d94ba363ddda326c00cfbad2a6ef2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZQAY2258140.
No Me Importa Que Usted Sea Menor Que Yo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb123b99b6f2fb6fbed003ecf9f74934625e4abf52cf919229e8b3f9a04ac7e. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZN882293994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9a3e5b576f4f5ba0283f347f497e02cd84d21da2e58b1e1fcf80dfb3354e79. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZN882315331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473035b681ea20a766b682b2c6a3d7fec359c0b41e2761bd98b7d7b19cac18bb. 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/QZQAY2366057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4803ebc46a4728b5e10f9844ddf1c541b779d84795122331cde67e6284ed39df. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:04:44Z), 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/AUMEV2283175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1866e3322c6b209e2dd43a8161793984cb5ca4f464df7523c7e0a5591bde4f92. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWDW2212078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc892560b2fb66c13f90315a806022a90beb6da975a50621802e71d59bb6c830. 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/QZWDW2380142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc892560b2fb66c13f90315a806022a90beb6da975a50621802e71d59bb6c830. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZWDW2380142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a7c529613cc9e1be2e11b7a6839c80b92d5ecad210d6a640756d62fad40699. 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/QZS7J2381490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c7d7fb630dc00c1594647afc39de69279e21f94a22cad576849950b1cbd49c8. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:43:03Z), 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/USA2P2359752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0e702631445017b7e6e6935984153358085c99cd9dcdf1292b76ff3116726c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZZ662473772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e11e5453c28f87e04fa4f750760b547a782b1266ff726b7dabe42db481a43cd. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:49:34Z), 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/QZZ662473770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1013f7f1bc6b2ada0b7a348a656d53289b0bda612ade6da368c7824f2c77d705. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWDW2404463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4c4d690887ec156ba365c694ce89333cf3ab6484606b52d0bbb6bcafcc833d. 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/ES71G2505044.