Magdalena Cullen (born August 8, 2000), known by her stage name Maggie Cullen, is an Argentine folk singer. In 2024 she won the Premio Gardel (Gardel Award) in the category of Best Folklore Artist Alb
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 0x71ae4a9761e8702f2907069e3779a8d9aac2019b650c2fd7bdedeb11da0865c1. 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/57a9540f-f673-409a-9ab2-cf74996e6488.json and https://artists.proofprofile.net/proofs/artist/57a9540f-f673-409a-9ab2-cf74996e6488.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Alfonsina y el Mar (En Vivo en el ND Teatro)
La Cultura Es la Sonrisa - En Vivo en el ND Teatro
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 0x5903f7ae9f5de5dbdec7fc4e33eb732f6d8b19b4128d621016064f1ae98b643d. 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/ARF392200023.
Muchacha Ojos de Papel - En Vivo en el ND Teatro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40857d186047696f1e1e6ed4a3adbda61d7406f43b7bbc7f93c7f4156c39d8ef. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/ARCN42200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1235c88ecd242c5f0550d8c57cfc317cf2b2a78b0375589b34a543ad505952. 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/ARG602300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bb3a4c1d64ee664d66907dfa65721d0c712e53d244953a9bd5c058970724c1. 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/ARG602300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1235c88ecd242c5f0550d8c57cfc317cf2b2a78b0375589b34a543ad505952. 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/ARG602300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b79444950fcfc443d535b902f73d14a14680ffe9bb286a74c9746e16a6e2d2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ARG602300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4fc7fc7433c95cc6eeb6cf2668b3bafc0b37ce837ccade4393a97ebcc79f51. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ARG602300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65bb3a4c1d64ee664d66907dfa65721d0c712e53d244953a9bd5c058970724c1. 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/ARG602300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e53c2158ecf3ed696223872d11f94df6fc77eafb92312626a11ef35c0d45760. 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/ARG602300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d45df4a7fbb4ee96f65b7793f2c8a9bc64e32a5649003d51c2e0b5b06115e1. 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/ARG602300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa349854c2b0074c3bf2d72761406ff46b41257cd5c0d437f2fb0695a01dede11. 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/ARG602300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599a6bef515d78b207b83a0a8dffc479375671dffa264320deb2f54e6a3eedc7. 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/ARG602300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d31c12b0e6d91cafcea2e1676e7c71ef790a02029688ab97294ba595e7b784. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ARG602300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8628d57256e1c80dcef329a25aa9c0fb96cfe909b75b8de1a3c1595eaf54a94. 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/ARG602300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9856594992196bdb16df3618c10e70d6f044e75d57450e4d63189ee700c690. 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/ARG602300065.
Un poquito de tu amor (feat. León Gieco)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b9c0e5f5a20713f04669031b2e1c6574277eace5c7da2813187bbc7e8d644a. 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/ARG602300066.
Muchacha Ojos De Papel - En Directo En La Voz / 2021
La Voz 2021 (Playoffs – Episodio 4 / En Directo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8554bfdab320a4e3ff87817a757e96c774163e7da84f9342266d8fef06a7049f. 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/ARF362100258.
El Breve Espacio En Que No Estas - En Directo En La Voz / 2021
La Voz 2021 (Octavos – Episodio 4 / En Directo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c60b3070f3b85af0309e6ef44b670d4f77d59f70926dc23e9af6ae7043f329f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ARF362100330.
La Voz 2021 (Semifinal – Episodio 2 / En Directo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc814eb730068256f563f209c2d4f0f2e07de2fc3d40a2afe75008a5eae17c75b. 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/ARF362100358.
Carnota Presente: Homenaje a Raul Carnota a 10 años de ser luz (En Vivo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9396f726e5b836dbfc0d8b8e82a57ebc0d6f3da13f6f5fbff3798dc6adb689. 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/ARCH22400079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe281b420ca4766d9f31f97502901a8153709bca4aea5a385d6da0da72ced43c9. 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/ARCH22400088.