Mex Urtizberea (born October 25, 1960, in Buenos Aires, Argentina)http://www.mexurtizberea.com/home.html Mex Urtizberea Official Home Page Biography is an Argentine musician, actor, writer, TV/radio
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 0xe1df37854576771beaacf5584d9e62371b9db08425ff4fcf93f1ea6854049209. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5d691f0-03ed-4aff-a7b6-8ea11a83a1e3.json and https://artists.proofprofile.net/proofs/artist/a5d691f0-03ed-4aff-a7b6-8ea11a83a1e3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Te Quiero Esta Noche Conmigo (feat. Ciro)
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 0x095cc5252e77201585378efee9572970ca04a4213bb3a22d170c2beb2da6e21a. 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/ARF101500157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0570d7310e76ab9bcba370b260116b9be59877201ec0a6087c346931cbcef93. 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/ARF101500160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe70652b65a35feff1db0a7e5ee8ab7c28bbb5de7de2458ca676e70b7a936b6. 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/ARF101500165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208a4997d28ae19fbf46802f0dc4a99f1d319faa6a37dd454f8845ee8479a54a. 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/ARF101500163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803fab827ba2f60c4b30e05dfd1d69ea233b7018c613803e7077ec5142500c6f. 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/ARF101500158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e460c9c7c201bb366cc22b40119dc6cfb074d9818700e2f7d8198116d5b25b. 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/ARF101500161.