Pro Cantione Antiqua of London (PCA) is a British choral group which was founded in 1968 by tenor James Griffett, counter-tenor Paul Esswood, and conductor and producer Mark Brown. Their first concer
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 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 0xf2e94aac916d0f7a4a633fec0ff91e5025393163e1030afdee80206d48432f7c. 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/9d72792c-c614-4a4d-828a-3f449ce942d7.json and https://artists.proofprofile.net/proofs/artist/9d72792c-c614-4a4d-828a-3f449ce942d7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lassus: The Lamentations of Jeremiah (for five voices)
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 0x59b93b9f00b768c24f4d20f4982580da590b8bc05bf837366a13164df5653078. 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/USX761112301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x534bc8a1c0c150082d480acb0bae25613a973def08dbfa8d67c7150615a0604d. 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/USX761112302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f2a1e37e09df15377ae7f15e558171b404ecb3905c11f26d5ae64459035b22. 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/USX761112304.
Lassus: Requiem, Music for Easter Sunday
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1f0fefb5209ca6da9c0efd6e4536cd58c645d958338a051ccd164b1facea04. 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/USX761211731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac6a6bd62e7916374429e7e0e0a827eac69947275a9b640b6f2356c5496a94d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USX761211742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c83623828c04c39ee14eaa6a14750350c58e754dc7de2c7f722d052bab5e8a. 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/USX761211749.
Various: English Madrigals, Sing We At Pleasure
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b76c91980c039a3db1cd41cfc87d682b139d4704bd025e1ccbd17bb664575a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USX760903903.
Ars britannica. Old Hall Manuscript, Madrigals & Lute Songs
Wilbye: The Second Set of Madrigals: No. 15, As Matchless Beauty
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77979139d0b4f09ac3987a164b54be2776ad2d1a6d22355054dc0f1a261d2051. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEA808000022.
Voces angelicae. Portuguese Renaissance Church Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74eb92549d082cc179ce6a7d2fe7be8c245310314ce2967dacc10058701c0901. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DEA802400004.
Cardoso: Liber primus missarum, Missa No. 4 "Pro defunctis": VI. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2329fac6eb6bee41430b3bfa935b43e6ef0e47f4cda48070a0120e4618b3893e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEA802400015.
Palestrina: Lamentations of Jeremiah, Book Four
Palestrina: Missa Papae Marcelli, Stabat Mater, Missa L'homme Armé, Etc
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69e6f29460e9e70a58c1ac9088c884f91f8cb526f57f181185358c56aa15882. 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/USX760906102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2d36f1a15903fc6ff77e914371c67348aae9cf04b428bd17fcd5ae5965f1b3. 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/USX760906103.
DHM Splendeurs: Lassus: Requiem A5 / Magnificat
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x031784c9189f214d05640be821391d6bf3c6b8048a5040dddc2d06ab6e616348. 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/DEE477400334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e3ab3e705adb0bef764d6d6d60b272d2ce364145350c7691f8bd05d17298d0. 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/DEE477400342.
Alma Redemptoris mater - Motet for 6 voices
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80d29873f5cd1508b636904f408b7227bbf688d295a6ca1ba01080a72aa77b1. 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/DEE477400344.
Palestrina: Canticum Canticorum Salomonis – The Song of Songs
Di Lasso: Missa "Bella Amfitrit'altera" - 3 Penitential Psalms - Motets
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670b5c106217de5c37dacfd99abf565a4061b6f81e8de6fb6fe255a6acc05c36. 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/GBLGL1270046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51228e9ed6fd88c951a5a8c703e09b16512de8c78713b0953b87ebe86ae0eba1. 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/GBLGL1270047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec40eb0fbb5bf6678be66ac642a8c8aec0586025dfb7b74f3533d77ff1d113b2. 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/GBLGL1270048.
Palestrina: Stabat Mater; Missa Aeterna Christi Munera; Masses and Motets
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ef357553b5e0494b08056ff75b3f2b5a8adf80b49f44e35565840cd63f5150. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USX761217910.
Tomas Luis De Victoria: Missa Pro Defunctis
Johannes Ockeghem: Missa "Ecce Ancilla Domini"
Allegri: Miserere; Renaissance Polyphony; Consort Songs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c74add5e286d1eee4d7cd0b3a286d7453d2311fa818b8bc60195a2f0e80f14d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USX761008502.
MONTEVERDI: Vespers of 1610 (+ 6 extra works)
Cantiones sacrae, Op. 4 no. 13: Heu mihi, Domine, SWV 65
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851d3d07c4941897d2ec33c31951ae260b6a546a62292d3ff2c75a65a0958d2c. 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/USX761011804.
Ensemble of vocal soloists: Pro Cantione Antiqua - 75 for 75
Palestrina: Missa Papae Marcelli; Missa Assumpta est Maria
Palestrina: Missa Brevis; Missa Lauda Sion
Tallis: Spem in Alium (40 Part Motet), Lamentations, Motets & Hymns
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68631af9c18be74726bd3a08445442460efcf673167693720c1acc74881a3812. 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/USX761108202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb327bac5d27a9f80c18ab032a691fb39ee71588ca0a10552f355a9533e3ee8bc. 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/USX761108206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4336abd5dfab602e5391b8c155fe499c4cf953d96cd8de27155cec38b97a47e9. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/USX761108211.
Gregorian Feast - Chants for Festive Days
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa492b1d8c51711f4c48eebedad400a2d8a3b76880b439fa8c4636172f28446a5. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USX761111701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ecb47af6d92af71c689b1643e14b8e459841f18d72e73921313bfa1ed80db8. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/USX761111702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315ad218cdbed0a7e0d6b5655df77fd25ec8ab93b5087b0056870fc5b6033114. 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/USX761111703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bbaa564ecf6dfed7437f6637145361e6e73067eb902d8facb52f1a0061c0a7. 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/USX761111704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e3efa031d081e7eee408429301d5bab24814f6e0dc049c9dc86ae0fcec9ea7. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USX761111709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b411c351d3c415fe5a5b9d127ab2048186dab99d027a9c60a26f7677674c8df. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USX761111710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c5e0ab87d0c5c6f08df412178662a8e2de77e49ad028855afcd0f99a0e8ae6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USX761111711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aee4e4ff55b1dd4dbc0e18b132cad2a4c7520bce86fca50fbc97dd9ecf66ecd. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USX761111712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ed6ed15c31b68bf9c7f47294824042412b8f7e53678afc384d6797ed52fbe6b. 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/USX761111713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b577724742ffadab255bfb816d4657b1573b94fd8c00a853347dee3b1702a3. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USX761111714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ca895c6cb81a0d4d7c6641e7c8d4449e41dcd9b27a0d88c4894697776276bd. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/USX761111715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9c83f254d129c44b4ab91b8f4ade58c780d53ef0340f678a91d3fd083d5bcb. 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/USX761111716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d879f5157ca88b995e4839875c761710657c43287ae55a838cea518f9689ec. 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/USX761111717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa120f8d5654a532b2f80d3c38e5d468deea1f99af365fe8f738a49a38f230c52. 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/USX761111718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ad9d60b0c59cd0c98e25d33861dd144dd4c14e035b519bcb9a47f85d062a28. 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/USX761111719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa1146ad6205bd51e19e08d535d76582c96228eb8bf5c326e599d0ca8c02a29. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USX761111720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab11e975a5735b6e3e46f5c2327f5cf6827b31c5a4aa76af42658cc10614260. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USX761111721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27efd1ad164cbe6e35ef4377939873f718b2f9c3d325f987a6b09919326e2a8. 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/USX761111722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7f41c86c615ebdc6f11b5e858c811c9c327801203f9ed0c619e9599c83b482. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USX761111723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e413138331382cdd90a48433aa74c4f85196a85e71581fa1d633f058a7e186e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USX761111724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6328be69e808bf53ff53ee0ea3c5cfa77cc5304697ffef0b10a0c662ea9bce8c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USX761111725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc585f7ce1c7ccf9164e4f2cdb94285175e671acf41fe6ff1715111f238820052. 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/USX761009503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5979836490fcfc473a5b052f48c968d786c51e2b5981494b2ee2cb032c78395c. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USX761009505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085f59b0520dd229e912b9b2cfdaf43f5f784acc575486df59e676b01a7871ee. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USX761009508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dcf02ee9cdcf718071e1c602e5fbc667c7dfedc4b52fa492ce7ade222c11eb5. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USX761009527.
Gregorian Chant Intoritus: Puer Natus Est Nobis (In Nativitate Domini Advertiam Missam)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23321133aec549f66d5e7fdb603916e4be5651e116b31d79e052717b0d23beea. 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/USX760700405.
Gregorian Chant Hymnus: Aeterna Christi Munera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ede2d86cd7918f3eb6f11d3a1523e93096ac3c158dda65c7511cd8ae6e11504. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USX760700426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae72c86f7983caa5a96eaecc5868817148524150b924b31e1229aef0bda9f05. 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/GBLGL0809919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789ffe9e256b72053b450f2695a7c42a72f10e3d8d90c9259c2d39c833f3a04f. 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/GBLGL0809921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9508e0b5376f4610705499684f0f097e5714d9468052266d6a0986d74965fb. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/GBLGL0809923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f7748efd90a4361f1ea22848b3f85e2de99caa2496a7d4bb89ef1a67931ebd. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GBLGL0809925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205c97790e8b4252ce5480f87772e94f42c973f8e8e8e9e4c4bc68d1a4020986. 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/GBLGL0809927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053fb0ed254c1cb6d470d757bee2ee66d343f515743a042d896c53b9d7d61371. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBLGL0809929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b7072a405d01e845f146e684043c6785e8d5d9bcf414a6cc28d8c0f3fb67bd. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/GBLGL0809938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753699700fcf929a14aac4d9c3121c9583dc926e5633d44434a2ba33b8bccaf1. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/GBLGL0809942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1186141a4b19886495acc2e8a3d89e3650cbf3a21cc3561a632d602ea6653a. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBLGL0809945.
Melgás & Morago: Music of the Portuguese Renaissance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aeb77d0d6832135416568f9391f47308cac789f097cb03b3cf9126bfc2a3356. 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/GBATS1013313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1fa37c82f29c31f25d11703456e2df9670dd077ffff09bcdb3cf39732eebb50. 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/GBATS1013314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5846d889971f97cbeb8ad70eec7fdad0548822fa596f2beded2190d406f0f848. 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/GBATS1013315.
Iesu, quadragenariae dictator abstinentiae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2271f9b50be8fde2f1dcda9f76f0458929e46fdd248baf31b80bdadc3ad2ee88. 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/GBATS1013316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb536038c3da0f6595ba0dcb1c16498bdb9db2d4b1b8e8e99ea23b0790fc04d91. 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/GBATS1013317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a12ae21244b03dd551b294d9fb4d3ace1c0ddbc1cf2d583eb339989f41dbd5. 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/GBATS1013318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53626562f6c9dfad146e6284cb211a7deaf5c74b731e3dbf9fc9316031746047. 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/GBATS1013319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964932d51db63b3d86f6671bf64ad818d68769b3034908cfc69283962d970dd7. 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/GBATS1013320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664538374bbff1f84bcbc4ca4b6df1cf57417621fef02f94ff6897a571f5f891. 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/GBATS1013321.
Three Antiphons for the Ceremony of the Washing of the Feet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2944647703bf8462f86994fe6b348c1beb931f6fab5d81c6080cfc411c143b52. 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/GBATS1013322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x630153cd1d5f43047c974c8d58a4a83b5651c8b6b125ba667270ef1768320011. 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/GBATS1013323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621c375860c1a12b84c2e5e2b854cd07c6c2a32bc933661eaac4dc1fc38d71a1. 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/GBATS1013324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd88e1cce90ad45808828b405e173b72ccf73b1602209e301ebb50b843eb3d9b. 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/GBATS1013325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957f1b31f1ab60efd96609013aa3704b9c02d096d7313a3e127ed31638ac6d5c. 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/GBATS1013326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce97876a5beec382f610f7fefeb760e46035f6aa972586e87ad64e5d1d94eb1d. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/GBATS1013327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63f62fcf5c0f6fadc902233faaa6469dcf78ce4c24db9671a09fdbf1ef965ec. 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/GBATS1013328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b8374fae41bfbc154e760da0816a78bfa47390d9563c576fb9c4f9e0833f20. 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/GBATS1013329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec3c36aea84fcc4dc87b3d147243269af12a0232a425c1112933dbef548f7209. 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/GBLGL1245164.