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 0x72002560b2dfdbbd7d06207d30e108506f7739f6a1b57e142f3fe2374ce24732. 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/4af6b9b9-7b24-40eb-85fc-c183c29a4fa4.json and https://artists.proofprofile.net/proofs/artist/4af6b9b9-7b24-40eb-85fc-c183c29a4fa4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
For You - The World's Best Loved Classical Piano Pieces
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 0x23fc9a1db293804390149aa384c3b8a191ef12ee09e513196baba364db5e75e1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CH0011300110.
Albumblatt für Elise, Bagatelle in A Minor, WoO 59
Ich mag keine Klassik, aber das gefällt mir! - Für Kinder
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97e24d41d245a1c0bf20d1bfc0754fe82e81341b2dd61bc790f4d63c0967b8d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH0011300093.
Ludus Tonalis: II. Fuga prima in C (Lento)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae6d162a98717b1774def429a8859614ced89fd4baf2678eb8b3ef20c460c36. 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/CHE271900074.
Ludus Tonalis: III. Interludium (Moderato, con energia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efbf241d18240910e2e696db586d41c69e4275311fee7185bb2d61e541c758b. 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/CHE271900075.
Ludus Tonalis: VI. Fuga tertia in F (Andante)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554afed3af557574be1b224b07a254f4d1e6ba90c623028a4b0cfe2223fd107c. 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/CHE271900078.
Ludus Tonalis: VIII. Fuga quarta in A (Con energia - Lento, grazioso - Tempo primo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23e11ffebfcfa50ca6e3785961598854ccfed7fbf527b580bb86be66d866652. 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/CHE271900080.
Ludus Tonalis: X. Fuga quinta in E (Vivace)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf98e114a92f0eb0858cb5d867cc2a53f9526b36319724b5a06abdd7afacca4. 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/CHE271900082.
Ludus Tonalis: XIV. Fuga septima in As (Moderato)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee11e0fa4f4003929704fed5865a8da3922748edca6ab7959895dbd1b42d38e4. 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/CHE271900086.
Ludus Tonalis: XV. Interludium (Molto largo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5d269a619f6ebad0e059b8058885b012ea39baf1b5b5f958e4d5703845757d. 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/CHE271900087.
Rondo a capriccio, Op. 129, "Die Wut über den verlorenen Groschen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d16dc1a44a6e560f993e21d5f3d4c98d903a3e96dae5997874950315dc80b8. 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/CH0011300095.
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
Ludus Tonalis: I. Praeludium (Moderato - Arioso, tranquillo - Lento - Solenne, largo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69aa8bd41755c25ee70082cd09643c8f8d619067d80007b0452a01d228e3e60. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/CHE271900073.
Ludus Tonalis: IV. Fuga secunda in G (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4daac6908dc5f53f67709f64292037a981166e03ac8b8378c60abb8366a9c9. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CHE271900076.
Ludus Tonalis: V. Interludium (Pastorale, moderato)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bff9f1abc651b7e4b08441ce564ca9fe4aed7c523dd1337bab49aa8fb51401. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/CHE271900077.
Ludus Tonalis: VII. Interludium (Scherzando)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe700b936b2bb498de782ec8493fcfed8b64b242f56af2bba217c57c241732013. 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/CHE271900079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c758e8738845dc11dbdf1ddaedf270bf9954f1d204b36751406c07b7c76e2dc. 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/CHE271900081.
Ludus Tonalis: XI. Interludium (Moderato)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee164257f2127644042690077a6881459a874930e150499b69ee44f16e365fc7. 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/CHE271900083.
Ludus Tonalis: XII. Fuga sexta in Es (Tranquillo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf064e270af637c6b489363d7ee1653017455788ee128a6ac7a87b3656fccf101. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CHE271900084.
Ludus Tonalis: XIII. Interludium (Marcia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc0999513b4e51f2c0019138c67547442523bd5e7d9f392d60f1cd5e0666840. 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/CHE271900085.