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 0x679d165385d0ad55a2eafac585acdb0831b85416010ba6023060cc44f8a12ba5. Chain 2 (Bitcoin): anchored in block 954115 (2026-06-17T15:44:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a291539-6a55-4e5c-96d9-ecdd567b343c.json and https://artists.proofprofile.net/proofs/artist/7a291539-6a55-4e5c-96d9-ecdd567b343c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
La Música para órgano en el Contexto del Motu Propio (1903) [El Patrimonio Musical Hispano 16]
Música d'Orgue a Catalunya, Siglo XIX-XXe, Vol. 6
Six Centuries of Organ Music - Bogotá's Cathedral
Bach, JS: Cantata No. 170, "Vergnügte Ruh, beliebte Seelenlust", BWV 170: V. "Mir ekelt mehr zu leben"
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 0xe88882d1b748abe886dcc2813f60a92383ba90fae8d2cb12d4114b76258dc621. 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/GBAYC1600556.
Ave Maris Stella (Dues misses de Cristóbal de Morales)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3815b4bfa46bee4d1b5154d6f804252e5352be3a4c3eba71739bbdd92d35fb6. 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/ES31D2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3aee76be7eecf9e93b0cafa3f78b91b33123e91cd0756832e78970e15bdb55. 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/ES31D2400004.
Missa Quem dicunt homines: VI. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808b7e1981faab986d1fdc72e856123f0c8214ccaf54bb2c89fd44fc5f0be48c. 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/ES31D2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0364a73be6c71156ba160caaf2e1097348819036d2883b025e353d4f1bc9aa3. 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/ES31D2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad3d6c3fc1d79d4d54d3e45b42f88446d02191373892f30fc0815abddbc91a5. 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/ES31D2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8450f0caf659f48bf83f388473d5dc20447c0c99b899b9e32da2dd0334fd6166. 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/ES31D2400016.
Bach, JS: Cantata No. 170, "Vergnügte Ruh, beliebte Seelenlust", BWV 170: III. "Wie jammern mich doch die verkehrten Herzen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089bf65cb97c3e810224af407c8fe1dccd4aaa2946e8505f5d402ed28a3779f5. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBAYC1600554.
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 0xc8d07a3312f86d40918f8554ed5d16eaf6eefd67a36d9660d22a35d938a83a8a. 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/ES31D2400000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d599bd2490d7cfd9c47eae1b2e16237b839527693d554e6e514bcdafcf8f8e. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/ES31D2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f952748c36e9ea568770a8d08cc65a88289f5b2b07d49d8716686c476c04cc5. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/ES31D2400002.
Missa Quem dicunt homines: V. Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1909d0e3ce15d2417fa4dce5514d963a644bf5833f125260958d082f9867642c. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ES31D2400005.
Versos sobre Ave maris stella - Alternatim
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4028bbab61a6e49e00daabb8ed2c8c7a7767665461ca47ed01ace095bd14f2a3. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/ES31D2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3dbfbc2fe48d65726834cc798cf0d44aa24d504891c1d64ccd54befc875f2a0. 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/ES31D2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271572eda41135eecad7ff6943858adafcf11235dcd33a4e3b2522b90e4b42ad. 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/ES31D2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e6349ceb07e8583b2e515468286a092dfba5b147c68a500f678a3b234b2a0c. 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/ES31D2400019.