Os Músicos do Tejo (The Musicians of the River Tagus) are a Portuguese early music group founded in 2005. The ensemble's co-founders and regular conductors are Marcos Magalhães (harpsichord and musica
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 0x58eafa577522228b1d31a252a3b9a864916bff09ec21ddd9800d559a32a5171c. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4abe792e-bd37-4744-9813-97706a7c80f6.json and https://artists.proofprofile.net/proofs/artist/4abe792e-bd37-4744-9813-97706a7c80f6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Avondano: Il mondo della luna (Excerpts)
From Baroque to Fado: A Journey Through Portuguese Music (Live)
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 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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b9c1271a878933347dd9939ddf54dcb366def509427b644e9e5debd13cd921. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/HKI191722103.
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
Mer hahn en neue Oberkeet, BWV 212 "Peasant Cantata": I. Sinfonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4deeaba7b09f465b74fb7242dcf3b7e85f4bdbff9f97688b956f14549f04448e. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/HKI191722105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df0d2b9852e0beee198e94fb23d0ad8bef21e945442559f5eca8bf379f5d320. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/HKI191722106.
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.
Entremez das Regateiras Zelosas: Duetto de Marujo e Regateira
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84a8dc1055b95ae8f12c1fbf2cdf28ceacae399dd5f4e188aeb834daf05482d. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/HKI191722115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339d6e30046ef3ffe52504151394945a79f0ab976452ff8ea811ee73c28d302e. 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/HKI191722117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ce3591bb776359ef985ea2738df27a8946d550d8a99fd46adbbcaab738827f. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/HKI191722119.
From Baroque to Fado: A Journey Through Portuguese Music
Obras-primas da música clássica portuguesa