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 0xdb8f3a39e9f92338e9d8cd68815ff8033012d5f79ba1a91c0d1854a3c32ce2f0. 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/63410b64-2ce4-416c-a065-ae01f6f9a7c5.json and https://artists.proofprofile.net/proofs/artist/63410b64-2ce4-416c-a065-ae01f6f9a7c5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vaughan Williams, Elgar & Others: British Sacred Choral Works
Clucas: Requiem, Mater Dei, Lux Hominum & My God, My God
A Winter's Light: A Christmas Collection
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 0xfaba636985afc2165e29021f4103e762a051e868ee41cae4c5fccb7038b4a253. 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/GBLLH0916301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f80cec11e0746efe65ed833df38ae05b19a9afa4754f0ba5b4a3769ceeb62f6. 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/GBLLH0916305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb14e8246802f4044b93d08d37fa95ea85acd3c5f7f777e15f1f55f1c46cde67. 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/GBLLH0916308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb97bd1be81a7fe8375dc23ca98b7a490e41264c4efa348a4525816e0366420e7. 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/GBLLH0916313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538864a4411bc77d0206c068d4ef371e395d67aa17dd8aefed9a0108f7b12a6d. 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/GBLLH0916315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91515e65c3ad31981444e9a4557c455ea146bad569a7536c0e46c8fb250aafc5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USA560577337.
Deep Purple - Close Harmony Arrangements for Choirs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8971a79844b6d3fad9ec9c4676cdef37aa6d32f9d19907104e89bb1f90c303f. 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/CH6630376711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac26499b8d8d2ac5e05e2a43ce5fdc072fa731e91dc440372848bed8d1e6ab9. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CH6630376719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fd1151d103ce24cfb4dd4b44168073b37234b875b621dbc006f5b3d9267cbd. 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/CH6630376721.
Dupré: La France Au Calvaire, Op. 49 - Langlais: Festival Alleluia - Alain: O Salutaris - Messiaen: O Sacrum Convivium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8edca7e196429b251e88b70c43b499c76ecf07cc009b80ec205a01a5d4d8331. 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/CH6630172009.
De Profundis, Op. 18: Sustinuit anima mea
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb9aca8b9241c62cc445607c0bf284735c3acc56c1d778bba5c5298b4cdc2ca. 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/CH6630172013.
De Profundis, Op. 18: A custodia matutina usque ad noctem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f935375b552700d968511a223da70a9942d43898aeb088964bd8772f3f30662. 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/CH6630172014.
De Profundis, Op. 18: Quia apud Dominum misericordia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aab6f151b157b528f1ffbd05d5d436aedce9b7789e77332cebb708eb44e8a9e. 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/CH6630172015.
Vaughan Williams: Mass in G Minor - Bridge: A Prayer - Parry: Songs of Farewell
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725bd8afaca5a8925d5b37ce2f47a10921b9871f6912d8d56ee42b366ea634bb. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/GBAYD9500245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b482fd9ccccbc731b443ed71dc6eebd740e34dda18106bae74d9d23f3cca79e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBAYD9500073.
Two Hymns to the Mother of God (1985): A Hymn to the Mother of God
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fb4cd707af77a524d6a88733fbb36e59cc4411b714720814c257abef1778af. 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/GBAYD9500251.
Pärt: 7 Magnificat-Antiphonen: No. 1, O Weisheit (1991 Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7b151df025e696be15e317eeffb0ef2610804c46b76552b107b427bc23c3a2. 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/GBAYD9500254.
Pärt: 7 Magnificat-Antiphonen: No. 2, O Adonai (1991 Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a668632f0288d21558db8bab6b3df202d320c6f758b49b93740873f7cccc813. 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/GBAYD9500255.
Pärt: 7 Magnificat-Antiphonen: No. 3, O Sproß aus Isais Wurzel (1991 Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ecb252b1eb6d7540797bfa254f94fcd836fd1e05a886290f56f3a032e12e8d. 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/GBAYD9500256.
Pärt: 7 Magnificat-Antiphonen: No. 4, O Schlüssel Davids (1991 Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5729c356200991768c17442b723297b32998e2e0b7137fea87d0e6596284af. 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/GBAYD9500257.
Pärt: 7 Magnificat-Antiphonen: No. 5, O Morgenstern (1991 Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be13c5d79f0b00bf654761ceb6c0b2621a9a0638b406664fea5ceed6b0aa7c9. 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/GBAYD9500258.
Magnificat and Nunc dimittis (Collegium regale) (1986): Nunc dimittis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab21b140563e732fb94444ba9b517c03b50db4ba2012159637ed8362283630d. 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/GBAYD9500263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a5c09fcfe111dd8c5dd6547a2ba38e208c0782e3153848356e90a9737686fdb. 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/GBAYD9500264.
50 of the Best: Classical Music for Christmas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725bd8afaca5a8925d5b37ce2f47a10921b9871f6912d8d56ee42b366ea634bb. 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/GBAYD9500245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7b151df025e696be15e317eeffb0ef2610804c46b76552b107b427bc23c3a2. 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/GBAYD9500254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a668632f0288d21558db8bab6b3df202d320c6f758b49b93740873f7cccc813. 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/GBAYD9500255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ecb252b1eb6d7540797bfa254f94fcd836fd1e05a886290f56f3a032e12e8d. 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/GBAYD9500256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5729c356200991768c17442b723297b32998e2e0b7137fea87d0e6596284af. 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/GBAYD9500257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be13c5d79f0b00bf654761ceb6c0b2621a9a0638b406664fea5ceed6b0aa7c9. 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/GBAYD9500258.
Pärt: 7 Magnificat-Antiphonen: No. 6, O König aller Volker (1991 Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923bdc61edf039b6853eba703be50b7c1ecabf2c89b141210b6f0a1a8ad5b04b. 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/GBAYD9500259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725bd8afaca5a8925d5b37ce2f47a10921b9871f6912d8d56ee42b366ea634bb. 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/GBAYD9500245.
Pärt: 7 Magnificat-Antiphonen: No. 7, O Immanuel (1991 Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0829f3d88b0757d16d9e31b5bd275d5045fd00e96f0a688735386d278d8fe3f7. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBAYD9500260.