Francisco António de Almeida (c. 1702–1755) was a Portuguese composer and organist. From 1722 to 1726 he was a royal scholar in Rome. In 1724, Pier Leone Ghezzi drew his caricature, describing him as
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 0x172aaa638c7340750d5c5c64ac7db7d3c7bf5cf5d84da81c6f8fc4abc1302451. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e00a956-ef02-4d30-99e7-b9f0e639abf3.json and https://artists.proofprofile.net/proofs/artist/3e00a956-ef02-4d30-99e7-b9f0e639abf3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Zelenka: Barbara, dira effera, ZWV 164: I. Barbara, dira, effera
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 0xfab74e3b4ee564b136396e29c11bb596021ba5deabd308f8e30a98b858f3e817. 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/GBAYC2100368.
Fux: Il fonte della salute, aperto dalla grazia nel calvario K. 293: "Non t'amo per il ciel"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2738f052ca8e381243a4593e147b46f14061c03b37c842f933ebd31890a10eed. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBAYC2100371.
Zelenka: Laetatus sum, ZWV 90: I. Laetatus sum. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1e7ed1c99a4b207c8f3b9ae6019d4cb47fcb4813dd2ea2687bb1d21aa2d69b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBAYC2100372.
Zelenka: Laetatus sum, ZWV 90: III. Rogate. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e6991cea839315dc9331f99fdf9c1cc16f557ec54b947fedd6cfcba4e54220. 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/GBAYC2100374.
Zelenka: Laetatus sum, ZWV 90: IV. Fiat pax. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcce6d31e3fe0b2aa21c21b8622016d1934a2dfac137ef48fcb56c59e01d3bd. 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/GBAYC2100375.
Zelenka: Laetatus sum, ZWV 90: V. Gloria. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40e3023f13a4409cb85b5eef0d27b2b46a8ac6191b25080fb7f65c367f7f1e8. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/GBAYC2100376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9694695426af208d696d42c73ab31cbfdd0a61b782ea00e164281baa7564ec68. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBAYC2100378.
Nucci: Il Davide trionfante: "Un giusto furore che m'arde nel core"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5928bbdae63024eafc91e3d02d1b99a4f716ed6c3efb5779a472c8b754881771. 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/GBAYC2100379.
Manna: Laudate pueri: I. Laudate pueri, Dominum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6a01ae12cddd6649d7eacc5300884417741a7d337bd80bebd058414d9dca92. 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/GBAYC2100380.
Manna: Laudate pueri: III. Suscitans a terra inopem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b3811baf9067246251ea962d80f6c4f421d8af6fb3a412187e141c1cad177f. 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/GBAYC2100382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e4b063b66e43e8bc45f604ffde92cb20c4929677500962332d23f4f1ed3750. 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/GBAYC2100383.
Handel: Antiphon in D Minor, HWV 269 "Alleluja, Amen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe68f44acb9efbd35a49f04b638fad1bd81391a4963fe06915eedad9d592e7d4d. 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/GBAYC2100385.
From Baroque to Fado: A Journey Through Portuguese Music (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38dd1af2bbc4dae4db54684c279b70210763f0aa973a8ec005b156a3afe044c0. 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/HKI191722101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5053f98ba72bab3e26cd715cc9e3a2f35f450da2a525f71ca4aab5fa7959f2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKI191722102.
Cantigas de Santa Maria: No. 23, Como Déus fez vinno d'agua ant' Arquetecrinno (Extract)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95987d661a887d6f3a26e13b651ee55b95d2cf67c52bd71d025d45376eb295d. 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/HKI191722104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16ebaed9996cc851bb3754d6fd4a451d9c4ff99a22d5c67ce8ccfef40581945. 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/HKI191722107.
Il trionfo d'amore: In queste lacrime, Arsindo specchiasti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c3020debd7a8d5ac2ec3feccf40695758253d5b773e8d7d061fd269cacb994. 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/HKI191722108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625ad13bf3153ad84d7dcbb27a2df737bd2d12c065d2aa33f734052229aea6fc. 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/HKI191722111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3f99d9488c2909ef8a577f8954574f4355e906c3eea80b83d61addce641a93. 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/HKI191722112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4296207f59d4e1a04429266fab2be02073e82aa00ce189eb74aba221e441047b. 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/HKI191722113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bf0f224f2808e437fe19844bf056dd396b28334645e37c1765ff97c50e6e454. 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/HKI191722118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe48ead1ba321fc16345b9818ffd050a75dc199cc63dd3ce9d98d16f24c33dc5. 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/HKI191722120.
La Spinalba, ovvero Il vecchio matto: Un cor, ch'ha per costume
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3db165b10d1910d1ebc4b7ff5818a9245d59bc24334db92066d2c45d41ff15. 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/HKI191722109.
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
Il trionfo d'amore, Introduzione: Introduzione: Sinfonia: Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303f975e2c1a579a34e96e2b9352154187f13927d4fa44389a9bac27c6593d04. 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/HKI191436502.
Lusitano Impero: Hidden Gems of the Portuguese Baroque
Almeida: La Spinalba, ovvero Il vecchio matto
From Baroque to Fado: A Journey Through Portuguese Music
Obras-primas da música clássica portuguesa
Leçons de Ténèbres du Mercredy Sainct: Répons, Tristis est anima mea
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6178aba1aaf42cdbb723b2d5bc6d632f49f44a7de14aefc1330e52aff14ec29e. 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/FRZ147810040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efe959b6ffb0eab4c33da0fa4e3df93f294caeef99e2efc3730eb9f5130952e. 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/FRZ148311030.
Massage Baroque Music for Lovers Heartbeat
Concerto for Flautino in D Major, RV 444: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608dcd2ec29013be6d95a47a38038b78e63e1f450c409585efc700f4afedb6c4. 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/ES7141500257.
La Giuditta, parte II: Aria "Cara, non paventar"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d37c5dd544a4f29b2998d394b9b22b435f99fd39b15ecd4cfaedc668b3ba9f. 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/ES7141500261.
Concerto for Violin in G Minor, BWV 1056: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2ae5935d6ae4019d5974d2328ebe941671bfcb3fefe376744168a84d8b406a. 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/ES7141500262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0fff02ca301c2a96db320356b058c886e27c9e91496446960976c024f2e846. 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/ES7141500264.
Concerto for Mandolin in C Major, RV 425: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c9b21ef354afa757add5b8dc0d334180a5ce5a592e80a922453c5d7b3cb615. 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/ES7141500265.
Orlando Furioso, Act I, Scene 11: Aria "Sol da te. Mio dolce amore"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15cbcb64ee16eb1435fba60ab80050f09d543c9f0c396dbe9db4e717b4f935e7. 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/ES7141500267.
Concerto for Oboe d'Amore in A Major, Seibel 228: II. Affettuoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3d314ecd5b0bc01980040e74b1045a6f34c2a4187082dc2f3710d67b90ec4d. 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/ES7141500270.