Alexandra "Alex" Cohen (born July 8, 1972) is an American radio and Emmy Award winning television journalist, roller derby skater, and author. Early life Cohen was born in New York City and moved to
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 0x0b73a99bec12d95b82c9f3a87561cf2fbccfd41dd3206cd81d205e8c44f386cc. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f716fc4f-666c-4a40-9ac9-7cbe883beb70.json and https://artists.proofprofile.net/proofs/artist/f716fc4f-666c-4a40-9ac9-7cbe883beb70.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Alex Cohen - Ao Vivo (Ao Vivo No Rio De Janeiro / 2003)
Outra Vez / Um Jeito Estúpido De Te Amar / Falando Sério - Ao Vivo No Rio De Janeiro / 2003 / Medley
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 0xffae8cf9217ccc0674bb11a0c68f7f407d5d238647d51f2295792389ddf4bfdd. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/BRMCA0300100.
Coisas De Casal - Ao Vivo No Rio De Janeiro / 2003
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63ac7a4a5e972354ce9f3496d5d91eef140abcf195076d3548ca53ff75ed8e5. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T18:19:50Z), 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/BRMCA0300095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101202170ccf7e462bc59dc7b0f86b0cd6d13ae148ab3b6857ec6d28b147965a. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:51:03Z), 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/BRVSN1300001.
Seu Melhor Amigo / Espelhos D'agua - Ao Vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514c2f6f95cc83ee07b84f593178d97b9a7b48101d0fd227afd1c5b7f9829dad. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BRVSN1300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fbac5a303595c84f864fe94dcf56dc39eba6c3d2e102b4751b524340058589. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BRVSN1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb42573666d3312a8a0fabd6b084445cde540a75e2113ae26f72e131dfb53e0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BRVSN1300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde9d1544a479a3f1d1df862bf21d73f6b262ae071bd0e43b410202ff831229b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BRVSN1300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363c4fabf1eba842da7e5e3b53f716c909f893dfce319f7136e35a169c0409bc. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/BRVSN1300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd1e3cbab7a45bf1866314eb3579da7c499fec6338ee46bf892ee600dee12ed. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:42:02Z), 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/BRTMJ1700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d8f245f95f20503086e61288e9912c55b01e9bdf9a2c1ecb83a6ff338c8ac6. 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/BRTMJ1700017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ef59e890cea07aca9d14d910b6c4abcfa7450bb8c59231422424ad9576f318. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:18:19Z), 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/BRTMJ1700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff72ceae64fd14ca2a7a6c0632587709dfd58e42fa13bccec27ece392097d41f. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-22T02:32:52Z), 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/BRTMJ1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2009f48ae056b77b471ce5831e3dbb9e2fb9e7c325047f51ddb81c45d92d2917. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:22:01Z), 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/BRTMJ2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1194535970f5ad2d54746d2da282caf5a8b7f85f1ba1a291d9edc85ec897c94a. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/BRTMJ2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ca00ac0da1b27367b1ec52c8e6e31075fc94f749fc3947dd544a411ffe4d07. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BRTMJ2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d67f498b492fa8465c51db7be296a52dc07f588addf062d31b171b9922be2a0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BRTMJ2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8aaae5f6efb38cbd339dccfea00fa303c44dd365147dc65668b998e9b6e265. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/BRTMJ2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3d4ab9e56e4289b489c5b94bf00a416305ce468be1bb2afb2d6c8f649e58c0. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/BRTMJ2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d9f10d9a63da7225dc544443037f48232990e7dc013da10a839e4ca9a2f93c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BRTMJ2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5993cc90588480a80daeb95e7107e2d24ee8a1a3e28632903ab3b2c09bc6c08. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BRTMJ2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c17d4ba1cfdc58e7ac08b3d89703aca4e269e013b53fe4175a367d5c487a74. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/BRTMJ2400034.