thumb|María Luisa Anido María Luisa Anido (Isabel María Luisa Anido González) (26 January 1907 – 4 June 1996) was an Argentine classical guitarist and composer. Biography She was born 26 January 190
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 0x8355f79bad37200669c8f29e85871b43204c4f80034881ef0bf7b2481fb910ed. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0da77037-3e6c-420a-9386-cf77248710e7.json and https://artists.proofprofile.net/proofs/artist/0da77037-3e6c-420a-9386-cf77248710e7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pioneers of the Classic Guitar, Volume 9 - Recordings 1925-1930
Segovia & Contemporaries, Vol. 6: Llobet & Anido
Famous Classical Guitarists, Vol. 4 (1925 - 1935)
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 0xa5809a4656e952e798e7d7ed9e8bce122cc181beac9ef77632c5f02dd333b25b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GRGCM1891011.
Famous Classical Guitarists, Vol. 5 (1935 - 1956)
Impresiones argentinas (Argentine Impressions): III. Variaciones camperas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc837b7e6fc16145eb3987c251b7a09bce7a6e2f64fb9f87d2ce2f62fd183c395. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ARZ020801140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93e8d0a2ac959b54afed2f6aed536580517ac70a518a8a4d5b4d267e03d38359. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ARZ020801131.
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 0x7f60ca9c24555a6053a0f1f3a533f2e7cf0c584bc10e9d727fc5a480f3dfff2a. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/ARZ020801134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cbd0b8730e1cbe9d0e85a246392125616d2cf39f9dad5bc3dfe92175ea7034. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/ARZ020801136.
Pioneers of the Classic Guitar, Volume 7 - Recordings 1930-1956
Segovia & Contemporaries, Vol. 4: María Luisa Anido
Anonymous & Chilesotti: 6 Lute Pieces from the Renaissance: No. 6, Saltarello (Also Attributed to Vincenzo Galilei)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd70d78c7e50f041e57675fba1abdbebaf888a59d14804f39130f7921ad6bef2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRZ201800179.
Songs Without Words: Forgotten (Impromptu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6069f9c35dfd4290cc2c33329e99b5c217f6f11d7710b3abaaab484a6a3a1974. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ATC481600802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b3d920d929067b878e2ddb20c67f3eb439b613d57b5926ed8ffdcf8a4481b4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ATC481600804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec99834785085b9980b7b4a4bf6744c877f6be71f02245b15d69e35c301f3813. 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/ATC481600823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4797a841eb8c564e73e953b153a8b3026a36614ccd98c3d3542253156bb4c70f. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/ATC481600808.
Segovia & Contemporaries, Vol. 11: Rio de la Plata Guitarists
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690046c0ba2327d2bcc04f1e240399084bf314645a10c76bfba1a211109d3d33. 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/CAAGN1695501.
Suite española No. 1, Op. 47: No. 5, Asturias (Arr. A. Segovia for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07c6b700eae37828d953a65e41976d1a381e45515766f2bd039d3c32ef5b49e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAAGN1695601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3ae2b6c43f940c99f8a92cd903066d80a76da1f255242e576e5ba5ae39d6783. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/CAAGN1695502.
Tonadillas al estilo antiguo, H. 136: No. 7, La maja de Goya (Arr. for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a15c5160eae6cd830e6c1701cece2655e5ae927701e4bb5f37cfc513b911b5a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAAGN1695605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38aa624e224be71ba14c7d555e295c1e800063bd597f47f6f8378fc0b252524c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAAGN1695509.
4 Vals, Op. 8: No. 2, Junto a Tu Corazón
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe43fb2c8a27795923be9c36a97f7bb4327352c49fcce6ea2a5d1e8c339405e. 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/CAAGN1695510.
24 Preludes, Op. 28: No. 7 in A Major (Arr. for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020dd6cdd2e0617de9349a5f239d06c1ebf2918480ed22fd79d79e1ef1e104b5. 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/CAAGN1695610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62fb6d722306cc615e26328ac63ff714f26679e69b67bd1073f3e1edf406a07. 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/CAAGN1695511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ea03a4d4b58c098d9a7d00ba90c18d7470035fa5af5d6af187f155316987f0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAAGN1695611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08f56ea98cf623e8d9bb186d671c10f5caa012afe8de0bcdca1c81b4cbab00f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAAGN1695512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4adcedec9c501da915d223819c1de4afc072f6c5558e243831154481f6102711. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAAGN1695612.
Kinderszenen, Op. 15: No. 7, Träumerei (Arr. for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21bbe621c7c10f8134a1e342519cfc2814f3599d7c368f057931e1dd3a7c6fc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAAGN1695513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844d5543d8ac1948b5848b6f0af23718885250e83f880dad146e2ca6fdc0ab65. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAAGN1695517.
Impresiones de España: II. Serenata española
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064da55e54c3fd0402b02946427e1126e36555c56b7f1f2dfd93a289e64ad730. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAAGN1695523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x516f08d4cbfa966929377faf2a1026055ef493cb2f33ae6ebb03502da5f19d46. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAAGN1695524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a343305f566a2f9c9950ef219504b963b3beca560ffb109f7145b3581f8f146. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/CAAGN1695604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e279f872454b53b230c5e0b5d59505320d08a615cd293b451a9155d6d4a28c. 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/CAAGN1675403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa4033ad313ec040e52d716be60f176e9807f153c41c57ae04165bc1a423488. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLY332400899.
Récital de Guitare: Musique classique sud-américaine et espagnole du XVIIe au XXe siècle (Guitar Recital: Classic South American and Spanish Music from the 17th to the 20th Century)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ced14963fb27c6f2b3c832ade3101ac4f39438cc3c98c963e237664f986811. 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/CH1409903605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b15a57e006edf708efc657b3ff54f3ab4afc76ae2aa69f97fb338df805d0112. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ARZ021203663.
Aires et Variations: Tema sul Margine d'un rio - No. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ca604db6a935f8f2b2bb73c197d0d0eaa3f7aec926afc81989128dd9146ca5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM22515048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69091748ef2fe6303c57788983c7c63be7e7c4d0519848e0df0b9319f871daa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM22515049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e9feb02251e4612d0d477531a1ba18607837de4c19d0678b7cf6e9807d5b26. 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/USHM22515053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dcbf4988541a6c061e8e607e1346e5f5fe6356a2aac83ddf177f1cee2acede. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USHM22515055.
Master of Guitar, Vol. 4 (Remastered 2022)
Tarrega, Llobet, Anido: Homage To Maria Luisa Anido