Montserrat Cortés Fernández (Barcelona, 1972) is a Spanish Roma flamenco singer, artistically known as Montse Cortés. Her discography includes, Alabanza (Sony, 2000), La rosa blanca (Sony BMG, 2004) a
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 0x044b43ad4ebe87329e3131ba6340d2717e3ca915e2076cba220a4c0faba85fa3. 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/cb9ff39d-cfc1-49ae-a1d0-5b568e44c8bf.json and https://artists.proofprofile.net/proofs/artist/cb9ff39d-cfc1-49ae-a1d0-5b568e44c8bf.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 0x8efcd12ad8a2ce9ec8b21a6d810d42e5679b7a7b3202acfb24c3662d1f461e15. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ES5119902486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e338cbb1c6ef28bbb5bb7ffb654a72744cd780804b982ad2f765be7c4bc2c7. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ES5119902490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b832809e1b753f8cc7f238cd00d0de547f98cea396791260904cfd25c71ca5. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:42:37Z), 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/ES5119902485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab325b261ba0aa073a0da00f2a69a6481d2e15fe3738da64b6c32afd5732ada7. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ES5119902484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06713d5308e84f3a7cc2beaa4f5a11353e95270e2570e159747c5fd5a62af25a. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:27:11Z), 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/ES5020400267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1d7d3f076b675bf9fec727d3248b75cfcfa023afe60da7c6a08206f8689062. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES5020400269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e330334badfaadef76e7f22261a1b628cd47addbf87252753e2f6814ae7d9b3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES5701300704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd3803c473c6fb2383b6a64da417be17e235c509963be8c49ba1642f53ad3e1. 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/QM4TX2326887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c015e507fb360e1957593ed0cac5fec2a25e8a757729eeef01753cf19c22a9c. 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/QMDA62402444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a125eb54835207c929d559394e067d9ec823ba6dd85c29ff693888c2e06c46. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMDA62402445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dd53ac0be80ea50af78dace4a551728854a4ac99df130e74fef17340a37bf6. 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/QMDA62402447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01835b8491a933e8ff7b4c67f2e5983870d731fe682ff13c64da92ccddc899f2. 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/QMDA62402449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4439d271282bcfc1b74bf770b8cb81dc320f62e56044a0bd54acfc1be9ca095. 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/QMDA62402451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1346065cf51f934f526a8be959bcb31641c2a9cf4922f8e13706b41378126374. 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/QMDA62402453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87752da3b9fd1e8e01f9a68179922da3bac94592089ade1ccc2d3aa4e3ad2440. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QMDA62402446.
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 0x8e51bb892600171d606d0506d684bc812c8469459f55ccbc94707f9b75b1a209. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QMDA62402448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306abcacfc797e128272a051f06f22bbee2c055fae13153f21e2cb440040d664. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QMDA62402450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ccf181e39f6f144450b310a5b49d5e2f864639d3cb96546ea341d52e7fbfd8. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/QMDA62402452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4589df6e0ef1dea6c9df42c5120b1bb7b5c481404c56a4a78cff7b2862e35d8. 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/QMDA62187636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd691d1bf6e5aa07f6e0bf6cfcc5e87818fafa2b201aca8d2cfd861b5f4a28b6. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/ES5020400262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe801e29070dee2e9e3a8706c274b8e542967a0249fd124c482114a35e43e1564. 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/ES5700300651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe801e29070dee2e9e3a8706c274b8e542967a0249fd124c482114a35e43e1564. 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/ES5700300651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82751d4f78d9a06fb728d91a430d979f3569919acd5e7497b9338a0143ba057c. 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/ES6101199102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x854dc9787d4dcc3181aeaf75912e217605433eead3068d4fdacec1fc6976a3c4. 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/ES6101199113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba7bbf459535e279da582fa37472bc44ee71b317a7cdc3938fdbbc044c32e97. 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/ES6100721408.
Cantares. Los Artistas Flamencos Cantan A Serrat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e67635fbe5f162d4301a706f245c6506f27ed7759edb36d4d919510611bff0. 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/ES5701100863.
El Beso Libanés (Canción Libanesa-Iraquí)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ada57dd880579e023a7ab61dec6a67967f0bf9caed5d7017110fdf1a7b5ab02. 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/ES5701000656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a215892774c0cf6077700bef7fbf7b768cf52a0701cdd5ded2ada1d67f9325. 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/ES6102422606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af037e1a09a2fc6aa58a2fd77c40337ed0c6c66e63fa8c0e174f12fa1d36ebb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES64E2342143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e7ed1308dce551dacd4999e86ae426940da05f00246e5d0f2e13a550f20d94. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ES23S1600072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8dfb2420d64f83b00c29c86ae895abc5fd432cbfd44a5eca30246f701605093. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QMDA62186173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc480e001c58ea43fd8a3517ee3ffafee4ca9b285450dac7e5590ea20de78eaf7. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FR8E72300316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec60a06baf83692d269bba0ec9aab1ee16f80b078dda55aeeae24129d1555d33. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ES6671101063.