Fémina is an Argentine folk and fusion trio from San Martín de los Andes, Argentina. Career thumb|Fémina in 2019 at Rudolstadt-Festival, Germany In 2004, friends Clara Miglioli and Sofía "Toti" Tru
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 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 0x5f7c993e0331ed0f574bfa626ea60afca403d46e3ec17bd7cb57472e7c738aeb. 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/76168fb6-3e56-46c5-aa17-072b46bb77c4.json and https://artists.proofprofile.net/proofs/artist/76168fb6-3e56-46c5-aa17-072b46bb77c4.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 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 0x5b3003f5ee0a93489e9af3715689a1cc50e515597a6040874fc147a909aebc9b. 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/TCACA1471867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25df554285a3ddcacd786f7b7ab8bd76dfd56e6a1059af1a843521ccbda6ff9e. 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/TCACA1471951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef69b51293b61b37ea5f257429c7471ace1ecfa4385be230662e264a442aa0e4. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/TCACH1547478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6aec2ca063fc637c728c8373484af675b0a1f3fa5f446fc0886fdcc95a1548. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/TCACH1547521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b3297390a6f2099c8e5c579af54837b1be2293e4d9e98f0934e3d2f6414b19. 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/TCACH1547577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc193e3863783843c4206f97491b712a12bd8a2617552998aff7a772dbc724672. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/GBGLW1800221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d7b2a8dc842d08143572e4a138ac018634ea436538f6b3186d22d6406162a3. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/GBGLW1800226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefe527a8ef989def3c91015c4f58d1e80baee42b0656e771991368ffff40b29. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GBGLW1800224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7f51301867eef27e2f6b74e95a089a69816a7662ab8d3924175b086926d8c9. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/GBGLW1800227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e75bc1114570b8ceca457a4b8f350fc1a2bd64a361b7f4dea4cdd34d4fae954. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBGLW1800228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cbe96b0ba9b097fb2e2cdbeb190974c76e480027ed1612d6aaac351b142c65. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/GBGLW1800229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069afce3c09e326ee096b0eef86caa6fd8ae53d6ffe38f203415356a1a3a7d92. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBGLW1800230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b36a82ad6cd28c8399b1b900e46615d56ebedc615d237a8ede898964cb08879. 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/GBGLW2100006.
Inmortales / Jenny la del Barrio (Tigre Den Session)
Inmortales / Jenny la del Barrio - Tigre Den Session
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac21a4fbaf26eef96c0e69ecef20c1fb9d603e99a499c9644611a9dab270542d. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZ7362300016.
Cumbia Sobre el Mar / Inmortales (El Búho Remixes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444ac9243904642f75466d564d7efd6fa66545148d69dd6477f1d5ce7390f6d6. 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/USCCW1610927.
Inmortales (Body Move) - The Spy from Cairo Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e2021a7ec19ea2dd81a1ca96d486a69a5b13a53bf49f9c70e7a3d3e5613d6d. 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/USCCW1610908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7972dfbb164d18e4a6011df53087afceb65cdd5f06d33bee31e4d2ff8729728c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USCCW1611200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7972dfbb164d18e4a6011df53087afceb65cdd5f06d33bee31e4d2ff8729728c. 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/USCCW1611200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec5e1e71859348f9907f386d1dceeae600646dae1e305dd137aff29e2b229c1. 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/TCACZ1708743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399b91eadd010c00bf391e30015dd823a53ddc1c4136876d058581922ce0272e. 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/TCACZ1708744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2502c08f9d90cb71103e9ce9494d898f06252da948389b09408adfda7f809840. 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/ES71G1836147.