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 0x3bda960f733f2ca533e455ecbdc406c1da9dab59fe2a62fb4511112495d1515e. 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/cafa2e65-b80f-4b59-b0e5-4cd0c96ecee8.json and https://artists.proofprofile.net/proofs/artist/cafa2e65-b80f-4b59-b0e5-4cd0c96ecee8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Wholehearted (No. 19, Op. 60, Fernando Sor)
Nurturing Peace (No. 13, Op. 60, Fernando Sor)
Inner Voice (No. 22, Op. 60, Fernando Sor)
The Foundation (Classical Guitar Works by Fernando Sor, Op. 60)
Streams of Tranquility (Solo Guitar Works)
Por nos de dulta tirar, CSM 18, Alfonso X el Sabio
Virgen madre groriosa, CSM 340, Alfonso X el Sabio
Santa Maria amar, CSM 7, Alfonso X el Sabio
CSM 18: Por Nos De Dulta Tirar (Nunium, The Wizard Of Leyriath)
Leyriath, of Music and Legends: Cantigas de Santa Maria (Alfonso X)
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 0x0cb01f5dfdd379581cc1ae3e76a1d8feb9b498c21d024782bf2c31312b58a56f. 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/QZK6N2124912.
CSM 400: Pero Cantigas De Loor (Journey Through Liz And Lena)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52390abcff944fed7eb5d0329ed190e95e572f7d2b8894868e1e1b4bfa8f2ef3. 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/QZK6N2124913.
CSM 37: Miragres Fremosos Faz Por Nos (Chasing A Dream)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe7c0499ff5f78f6b97a97228ff8390098e3a26f0ecebaeacf674888f3b462a. 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/QZK6N2124914.
CSM 340: Virgen Madre Groriosa (The Muse And The Bard)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f2011b5d88deadcd4c20e3848e5ef4dc50a7eb09b3334f4e9d86389548b7b9. 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/QZK6N2124915.
CSM 380: Sen Calar Nen Tardar (Time Of Sharing)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb82360fa423c258f94287ecc4a6be92d3f6eec3e6014d4b75ed7680ef110ba. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZK6N2124916.
CSM 163: Pode Por Santa Maria O Mao Perdela Fala (The Quest Of Nunium)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e60f175c92ed20a1e787011e40f7e853e3c9e8c5e3a123ffe2fb067d4bf3040. 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/QZK6N2124917.
CSM 126: De Toda Chaga Ben Pode Guarir (Yearned Encounter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa71d7e580420c9cab25d9fc6a396987f5fb59b4751d769fb6fec1c1053a1dd85. 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/QZK6N2124918.
CSM 123: De Santa Maria Sinal Qual Xe Quer (Everlasting Promise)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf780b0461c54f179da903c4832159581c59dba27946dfeab785d186702bd28d. 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/QZK6N2124919.
Qual é a santivigada, CSM 330 (The Bardic Festival)
Leyriath, The Tale of Capricornus: Cantigas de Santa Maria (Alfonso X)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602709a466e2b90dd4549bc32085858e7096cd04b6700f90a25b71a7f8ed5c1c. 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/QZNWU2382626.
Santa Maria amar, CSM 7 (Portal of the Zodiac)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffffdcbe386a5299c3f1fdaf7b960dce47930115ba4b0ed54a81077b63435d56. 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/QZNWU2382628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x856faae80f0f505598d6f523f60d36660e858e57d30e16d12efca36aeea947ff. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QZK6N2124920.
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
Santa Maria punna d'avĩir, CSM 259 (The Extinction)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725c08aa8e74d3d7f80ffea5e86c376ceac30a67dba33ee2047ebd8ce2107438. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZNWU2382630.
Con razon e d’averen gran pavor, CSM 144 (Eternally Stone)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cde2f64d645986fe8f0cf7df2399bb610b3ee3e56fed4d09189dca33bedf306. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QZNWU2382632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61409d83bc200ac3e17251c96270367c49fed41eb4c8a7241c570b67531f415. 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/QZNWU2382637.