thumb|250px|Raquel Andueza (Music Festival San Sebastián) Raquel Andueza (born December 6, 1980, in Pamplona) is a Spanish soprano.Linn Records "Raquel Andueza was born in Pamplona and began her musi
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 0x618a62da65541ec117e9ecada78c2639419cb2a57ef3d5238ca39734cbbecee6. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d7e1de0-64f3-49f5-89fd-add0685d12a5.json and https://artists.proofprofile.net/proofs/artist/6d7e1de0-64f3-49f5-89fd-add0685d12a5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Alfabeto Songs: Guitar songs from 17th-century Italy
Affetti amorosi: Affetti amorosi: Amante felice
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 0xc501cdc9b6d79b761233fd1814e6131678b7ed40a811a4ab42c57f60fee2d331. 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/DECP61203001.
Scherzi amorosi: Scherzi amorosi: Alma mia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ae54078020c9d5cba51e410a8e5d893a970be926885e8af4ccc579e89e7321. 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/DECP61203002.
Libro VI di villanelle, "Li fiori": Rosa Bianca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794995a3a220a23afeb03f13c5a317f266a14690bedd6caf0082b444574b2fe8. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DECP61203003.
Li 5 libri della chitarra alla spagnola: Aria di fiorenza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb77845949769a41a8f4fb6d2ec6026d3b16089f2cffae9f8305f79b0fe5600. 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/DECP61203004.
Gratie et affetti amorosi: Deh volgetemi il guardo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2af4bfebaa3e5d89cb178372b21c7289c79a3cab418637e17877e8790700af. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/DECP61203005.
Li 5 libri della chitarra alla spagnola: Ciacona in C
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e835595086953252c4e83964bc6abd7fa6e46b925e5718d577fd94896b33f93. 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/DECP61203007.
Curtio precipitato et altri capricii, Book 2, Op. 13: Quando io voisi l'atra sera
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fc3900dc50c5ba45a41f585dc80f1e7c60931ea578a4ae1810f9511ecfc04c. 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/DECP61203010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0ecce65d3b0d4caba06ec43a5da0ec0a76ba3cc6210311907b74bde3c0ca14. 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/DECP61203015.
Affetti amorosi: Affetti amorosi: Partenza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bc6dabd0ac46d89362cffbd61b7c874d02218c637ce7505e116e76ae8375b64. 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/DECP61203017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c0f380dccbb5a3650e5dd241efb60c060df440eb767f5d762a9c2b1d0f816a. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/MX2831500164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f28608d0b04e5c4b4c644f14e69eba21c849065fb757ad61a5cc47e8f90304. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/MX2831500165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac83e455b8eaf70158d97c00b48923a49c52e8b39403437f745ec5be46ca6021. 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/MX2831500166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b0a6ad7f2b658e650dbb97c18bba934d148b6988657a50419546c1d38086ec. 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/MX2831500167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8448b1c36241eb1d1f2030ee6570978fab4b26086ca05ed7c1bf75e1889d301. 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/MX2831500168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690e37d56cc8ee83f53e376f7c9d373ba4da8012e3f7a441b7bbfc77cfdcf060. 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/MX2831500169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b090ebc80167e288dc3681528fd573a405eeac03c2b71cb5b90271e06be1cd. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/MX2831500170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61965ce27bff13efcdc4418c64c089681a4cdb5b7e4f7504c0f68427e95f6543. 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/MX2831500171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb1e6a514bc49b53ae6d442611967ed90566e147bc0aa0bc629c2c9395eae21. 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/MX2831500172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919e16db57b6f195337f94c4f748400057e73027f0813132cef804c4d07ac878. 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/MX2831500174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a84bd8268c5eed770f49a652cacc43afaa52d64420af57f375116590032e67c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/MX2831500176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8eba4cbc8fdf32be666215b5d96c8db5717ce2c0516c0e78202c2335f27aa7. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/MX2831500177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d5a136d3080d982be068707fae4b55fbe9f362dc613550863c62bd17484d06. 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/GBPFW1100643.
Monteverdi: Vespro della Beata Vergine, SV 206: XII. Ave maris stella
Monteverdi : Vespro della Beata Vergine - 1610
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72212df9b765bc2f18adcfeed6b885bba3fb617a1a49d7c24cf0b61105df5f52. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBAYC1002222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa996084cda8f1d116bb38ff38f993e5c488935076f4e6cefa6cdc2a8b279360. 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/GBPFW1200314.
Purcell / Arr. Pluhar: Come Ye Sons of Art, Z. 323 "Ode for Queen Mary's Birthday": No. 5, Ritornello. "Strike the Viol"
Music for a While - Improvisations on Purcell
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8f8d051d8a55ae3219f89d104fd24be5c76dc11243c05eed5bcc8e0b3431b5. 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/GBAYC1302982.
Purcell / Arr. Pluhar: Who Can From Joy Refrain, Z. 342: Song. "A Prince of Glorious Race Descended"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec701e585642195401dd97dc200d37667aba1787b9fd5ad675d89f1255d8ff2. 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/GBAYC1302985.
Purcell / Arr. Pluhar: Dido and Aeneas, Z. 626, Act III: Song. "When I Am Laid in Earth"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaebc7254453ceda9d9c098cefe01fb0d2406e920cb124b50a3f589904bd4a86. 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/GBAYC1302987.
Purcell / Arr. Pluhar: Dido and Aeneas, Z. 626, Act I: Song. "Ah Belinda, I Am Press'd with Torment"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2060edbb9196538fbbc2edd97bc257b18f8c6c702a1ed8bbb7b7ead39a22042e. 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/GBAYC1302990.
Purcell / Arr. Pluhar: Timon of Athens, Z. 632: "Hark! How the Songsters of the Grove"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3ec9e312951535b14f597aa048c268094dc1fec3b1ccdb1cb858bdf96f8343. 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/GBAYC1302991.
Purcell / Arr. Pluhar: The Fairy Queen, Z. 629, Act V: The Plaint. "O Let Me Ever, Ever Weep"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ac1f3fd007121885be6c096a15c24a8dacce707f7185c08e45d80006bf9a3d. 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/GBAYC1302994.