1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x79a7aebc794e7b3f0e2579c68eeb856193bc27dc9e688ebf49a7f1da403a2123. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a174ccf4-fd86-49ea-af29-472ee7197b46.json and https://artists.proofprofile.net/proofs/artist/a174ccf4-fd86-49ea-af29-472ee7197b46.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sweden’s Earliest Polyphonic Mass (Anno 1598)
Missa Lauda Hierusalem, Kyrie - Christe - Kyrie
Missa Lauda Hierusalem, Credo - Crucifixus
Missa Lauda Hierusalem, Osanna - Benedictus - Osanna
Villanella: Ach Woher Kumpt Mein Hertzen (1598)
O Hwilken Hiertans Liuflighet Är Ächtenskapens Förnöjlighet (1685)
Motet: Lauda Jerusalem, Secunda Pars: Qui Emittit
Motet: Lauda Jerusalem, Tertia Pars: Emittet Verbum
Motet: Lauda Jerusalem, Quarta Pars: Non Fecit Taliter
Magnificat Octavi Toni (Bahr) - Im Basso
Magnificat Octavi Toni (Bahr) - Secundus Versus
Magnificat Octavi Toni (Bahr) - Tertius Versus
Mein Lieb Will Mit Mir Kriegen (Hassler)
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 → block OTSBitcoinBlock must exist at that height 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 0x31864d9781f1b5b4f3a5377bff5ef0648be3eac9fbfb53098ff0781738a2d1ac. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/SEAGA0005020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c358d0e43c3a682dd9ef32d0c64649849d15ba9a266a0703dc6986a6c8e91a7. 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/SEAGA0005030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca271b900f01563efb4b5a739bf99c2ae2c5d6514ab7a248bedb0bf556dc5991. 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/SEAGA0005080.
Tambalagumbá - Early World Music in Latin America
Maria todo es Maria (17th Century, Peru)
Lanchas para bailar (18th Century, Peru)
Señora Dona Maria (18th Century, Bolivia)
Cachua al Nacimento de Christo Nuestro Señor (17th Century, Peru)
Dios es ya nascido (16th Century, Guatamela)
Matais de incendios (18th Century, Brazil)
Son de la Ma Teodora (16th Century, Cuba)
Una tonadilla nueva: Baroque Music from Ecuador
Oy nuestra reyna del ciel (Ecuador, 17th Century)
Muy hermosa es Maria (Ecuador, 17th Century)
Una tonadilla nueva (Ecuador, 17th Century)
Atencion a la fragua amorosa (Ecuador, 17th Century)
Cancion de un negro al Nino Dios (Ecuador, 17th Century)
Ese viril con pan (Ecuador, 17th Century)
Tono triste para oracion (Ecuador, 17th Century)
Cancion de una pastorita al Nino Dios (Ecuador, 17th Century)