Julia Trzenko (born 30 October 1958) better known as Julia Zenko, is an Argentine singer and actress. Biography Zenko was born in the La Paternal neighborhood, and she lived there until she was six y
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 0x716c9cdee34a1c2685151b9deada8c0d5d97d3a726c04ce4f73a9b202ad0f168. 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/c5046a50-8c49-4fe1-9a86-f76f709b2d81.json and https://artists.proofprofile.net/proofs/artist/c5046a50-8c49-4fe1-9a86-f76f709b2d81.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 0xecac369f745f49d6d89366bf87c72f3fa382dc149c8ac9d4312c23def37db4a9. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T19:03:00Z), 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/ART0G2000087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38f19a8c3def55349b316da4cd815d7cb2fb0195a94c197b371d3cae57ad409. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/ARF109902804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa385afd448f30ab262332b89146c0438c499d003429fff1c833c17906528619. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/ARF100200676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6997111da5b570a0800d01edc7e9b7301cd8a29aa0e9e79063b256a249b8a03f. 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/ARF100200677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5501ab7c8080f035510d9a0bc777820aeddf46d782fcf2525e6f2d18728d9df6. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/ARF100200680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cc3c4735d145c6009c1b555613790a096601a64a4145998e3b3215d3c40385. 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/ARF109902597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f44af43f16611b7abfb0f724ae6dfc4a7daf4bead8b57ce7b2f25358fb056f. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/ARF100200689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1a3083d8fe34e0a8c4448e9365ed5577478359b8c9db30f285f531c14051dd4. 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/ARF109500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a975cd8e3eceff76085c065f29533b7a8b55f1b517011e306c3e2eb0efcd8c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:28:24Z), 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/ARF100200687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5fcac1f36096201f78b3e58f6027a1acf94c9453e14eaac43efbfe438e571c. 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/ARF050100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3679dc30296a0962a0e8350e68bbc2abdca990dbdfc8c17f2675874c4ad7ce. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/ARF100200683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e8b3cc8186841d8e36e272e192332f8c99b7d83a26518219db5eeb0307b3e1. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/AR0TK1700002.
Piazzolla / Orch. Desyatnikov: María de Buenos Aires, Scene 3: "Yo soy María" (María)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6cc8cdb22b9a8a432fe6b87261b41fe802c6277c8d3a88207da18084426a12f. 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/DEA809800400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8caabb3dcdba3a592495ac8b6758ed3dd045befd4948c7f462c37dfe4dd3d7cf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ARF102300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac28a7dafd4e84b037b26117de6ef8cff34064181d5a307905e5d754e5dd7a0. 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/ARF102300116.
Señalada por el Índice del Sol (feat. Julia Zenko)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2108be7dbe04307b69a1947082464616e79c10cb7d4417c761baac13aa46ee8. 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/ARG601102870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107fb676c1f97d5ec5a0a67c484f56938eb53815f9a71c00e750be9f20853874. 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/AR1E01700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217f8bad2255852573e2c81c0ef5f2f10dc9daae68f6b77a8f5eaeccf6276c5d. 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/ARRSD1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf778463fb6197751cbb0a8740225b80f0c98fc1541898058661f9b49e26d5d70. 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/ARF390900740.
Adoro / La Otra Tarde Vi Llover / Échame A Mi La Culpa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6617e36d3d060d4933ce95ca3823ac2748161e74f722b846b6a59509c8e42c1. 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/UYM122400594.
Piazzolla / Arr. Desyatnikov: María de Buenos Aires, Scene 15: Milonga de la anunciación (Sombra de María)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbff265f4793196346e8a7b7ca6f0f990a2cfebc6abae0f972c50578c6ed7f0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEA809801600.
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 0xe445f15d62e8393a0b7de4335133ec2e76a4db7ec856cf452869296fe6da1c35. 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/ARG991021196.