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 0xee10f23d37a6cdb381bcaa7d9ef9d02d495b9fa8d60d7de3d14bb7bf4b29a0cc. 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/9fa31be9-81af-44ee-8b77-bbda8d6b2257.json and https://artists.proofprofile.net/proofs/artist/9fa31be9-81af-44ee-8b77-bbda8d6b2257.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
J​.​S. Bach: The Art of the Fugue (Kunst der Fuge​)​, BWV 1080
Art of the Fugue, BWV 1080: Contrapunctus 1
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 0x7a6040b87591cac576361d7423821bafa579e498815cb041157abfa1ba4b3acf. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USHM91731456.
Art of the Fugue, BWV 1080: Contrapunctus Inversus 12 A4 - Forma inversa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04eab78edde39791869cf0136ffd5d222ab5df14a90132925fb73f67d2e8dd5. 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/USHM91731467.
Art of the Fugue, BWV 1080: Contrapunctus 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08604e18514fcf87a354c6a66fbc399341a8f17f87c0d8cb00d5adf69c42972c. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USHM91731457.
Art of the Fugue, BWV 1080: Contrapunctus Inversus A4 - Forma recta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a46fbf1497763381bab3ef0094914c15a4792d898db4585243ea0482c32062. 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/USHM91731468.
Art of the Fugue, BWV 1080: Contrapunctus 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac0c37f467633fb6685c3957fae9eb7aee7be35dece380abebf06485666fe8d. 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/USHM91731458.
Art of the Fugue, BWV 1080: Contrapunctus Inversus A3 - Forma inversa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452629252d6efc0997e8aaee64496867e8e9b8aaab39db07b16f34028690d0e7. 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/USHM91731469.
Art of the Fugue, BWV 1080: Contrapunctus 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4de14b02d87b6f7625307b12276ddcf23b5d9fd5cb3f5ef92146318f8405b3. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USHM91731459.
Art of the Fugue, BWV 1080: Contrapunctus Inversus A3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa009cd8ff5dfef8e5ef757779ba0b415fd7a64e5650c3a43e653db39e122d118. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USHM91731470.
Art of the Fugue, BWV 1080: Contrapunctus 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fed56c0e8ab65d5cb90431ac5878b20ced883e9eb2115549ba94ede0395bce8. 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/USHM91731460.
Art of the Fugue, BWV 1080: Canon per augmentationem in contrario motu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bc43c52267cecd89e1826d484ec27cd6abf24b736f010a57e1bfec0ba74877. 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/USHM91731471.
Art of the Fugue, BWV 1080: Contrapunctus 7 a 4 per Augmentationem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e27e37d0a8429f01093c9e078993d6aa33f2d3ca263a905929c5a9b348d71fd. 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/USHM91731462.
Art of the Fugue, BWV 1080: Canon alla decima in contrapunto all terza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef94a62b67962a1fc8d3eac947578d2640cef81ad4f565dac52d85df0246579. 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/USHM91731473.
Art of the Fugue, BWV 1080: Contrapunctus 8 a 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99b38390d38a9230a2be3a30566f6c603c393103c80187bb7f055cebc293c0e. 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/USHM91731463.
Art of the Fugue, BWV 1080: Contrapunctus 9 a 4 alla duodecima
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638ae229bf44b4cd62a7b85f76c00c24168f2a2b3f92da684306b6389bd4aeb7. 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/USHM91731464.
Art of the Fugue, BWV 1080: Contrapunctus 10 a 4 alla decima
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb1aee0e717d4277cf1f236d7cb006eaddbfa489ee751197509edfed8876259. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/USHM91731465.
Bach: Well​-​Tempered Clavier, Book 1, 25-48 (BWV 858-869)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f7884b9c6b3e38c2fd695c3f59cd76027cbe793d823ad6d3cac50a210da09e. 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/USPMZ1419328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706ca07e2fd5b9a0b76f85fe3a89f16f6ac294268e5e3dd67213d26e15b5b1db. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USPMZ1419329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0949cf6d94bac7289415dcaa5d5e8922720fe47a1b40cb72e324b7a079e3efcb. 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/USPMZ1419334.
Bach: Well​-​Tempered Clavier, Book 1, 1-24 (BWV 846-857)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebf1be8fa4fa8d509d3e4cb819b753bb1110ffd8dc25eb9adfb70880c79bdbb. 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/USPMZ1419301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8b9d1be6b67add481fb4483f15c13a7ef9e005162ed53bbf2a03081113b510. 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/USPMZ1419302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4a97c0f8dcc0a49f2ed4a6ddb9ce3f7417637a74021745c3f1f363592576cd. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USPMZ1419303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449880e15569486a49e834257518482070bc2b11ca39052632ff835f992885d5. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USPMZ1419304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d60bc15bb1cca10fcaf2e435af49a8f257948ad773ec26c36a152ed9020f5c. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USPMZ1419305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff511c342a8fab61713c6ae1887cbcb8895bbb8fa36ebf9b0657467947ab0c32. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USPMZ1419306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3494dccbcb741b64f21f17c8279fc9c4cf044335445e96eb6b26fc0f288cd387. 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/USPMZ1419307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6ba4ed23ab48e84aa2f0f98a962e964f4ea3045c0d2ed3b71142818a68bcf5. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/USPMZ1419308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87c8402c15826b8a591ce99142d1df34ac379fab20bea967e1498f5f1264db6. 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/USPMZ1419309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba28a82d918bca30f4e5d9f84aefb7d5f6748abfd2ee632976a84c0fb29b8a4f. 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/USPMZ1419310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028d619a01b131f517f6824d4eff216fd8ce28366499ace3fa5aba7611f16821. 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/USPMZ1419311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cca34bf1cb1f136122a6dc9db1f8ee5dc41b9f5b7a5d502bcf4ad9088aaa71b. 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/USPMZ1419312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dd60fc7127868ed2fcd6c9b94b6da5c70459eaf5ec1c9fcadc7806c544b8ae. 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/USPMZ1419314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b768499c6eac83d69545b518cdf9da3ab00fa804cb30cf8cc775cdcf518eb9. 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/USPMZ1419315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1ef46167f2b299ad3e91c305ce9830ddfe3f7fa44fb1d5cb70efba4f5649bb. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USPMZ1419316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bc9f51f91d5ad18871ea3a5824211ecfb0b74233c783dfc8dd45839b520beb. 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/USPMZ1419317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a0b1fb1b63ee96111fca2da11eb4840e924c5395e4fa5e0e8efb45b6482637. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/USPMZ1419318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89be0599203e156e316132ad9710eda61733922a9f7eb152008b7dee4d523cf. 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/USPMZ1419320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882e20b3712d65668482a5aed686153d444844778a968299b69356635f8679c3. 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/USPMZ1419322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b5734148dd776b7452ae97afd5faeb5498abe42c4a3ec469e08b65afbca435. 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/USPMZ1419323.
Bach: Goldberg Variations, BWV 988 (The Open Goldberg Variations)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c574a563ac49107644fc47baeb150aedbd366a164caa3d9b188052672dcf0e. 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/QMPKX1327569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86403d42ad0c40b65c8ae62bbe161c092b2183a6008d58f2b36fa03eb85db44c. 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/QMPKX1327570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b31c6fd683177ef0e476182dc38a4b9a06d4bfab9f1e86699fdf6f7e29882a5. 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/QMPKX1327571.
Variatio 3. Canone all Unisono. a 1 Clav.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25caf889e86a2768ba0cd3db3987b73294763827c56bebd6f66b3062223921f. 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/QMPKX1327572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d52d03428665bd44a0a2454e18a9083d46a1df689444b8041f44ea801a6490. 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/QMPKX1327573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8604f7f23fbf395ab8fbcf1f06825a4ee3283fac8a427ece44045229b032bee. 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/QMPKX1327574.
Variatio 6. Canone alla Seconda. a 1 Clav.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d77c4131f5b73de1d8b849c5062e17048165e2babf5042147fc563a9a2e3a9. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QMPKX1327575.
Variatio 7. a 1 o vero 2 Clav. al tempo di Giga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd53cecdd2ba107f746eaea9f8315558b77124c27ae58d341715e6595a6a7ecc. 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/QMPKX1327576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f9d6fdd972d0d92f6dfb251b9a72fed9484fbae8be9a72336bf678f42c24cf. 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/QMPKX1327577.
Variatio 9. Canone alla Terza. a 1 Clav.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4b2d255aeb090c9b7d5289f3191ac65ed4d25e0fd46105cfd824522167f9fa. 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/QMPKX1327578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44ea7688c46f2df1ce8c9152e2dcb35e61d18ee60fb779766cd7c2e80b17228. 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/QMPKX1327579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbf1bf98af4d4345160e1f9db922af4261d8589b9ad7618584697cc68a73d3d. 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/QMPKX1327580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac75c79a1147c33feb4f0762fcf447a8d171ee5950ef1568c77c89b0e1d2589e. 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/QMPKX1327581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ce102015e24b95fdd5c3418c6d0247aab6d1f9b5b029110597d5d991b30658. 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/QMPKX1327582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a134e052ae52ccc24726d56bc203e07f18119bb625c24f6460dbd5b83f6eab9. 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/QMPKX1327583.
Variatio 15. Canone alla Quinta. a 1 Clav.: Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bce4c0f9a6ead8d97c74bbcfcc42b6a37fcb38a28b6865cae03abb3cce19c5c. 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/QMPKX1327584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421e1d7bfd8d399e99684d1a55303b0fd3f2c04810fddc38d01a9ef20d5e8b50. 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/QMPKX1327585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58863c483dfac8cf80cf389193abc56b657f29d456d4470eaad5552081ede2a. 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/QMPKX1327586.
Variatio 18. Canone alla Sesta. a 1 Clav.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3aa1e0d82b175abcf1ce90698dc3a12eefbd474f1d45a6e97f1061db18804e. 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/QMPKX1327587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c5398cb605ec56e22f890c303601db5133673b4835514adcdfc83c94e8de60. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/QMPKX1327588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929cfd378ff00b2b382a25c465d4316637df9e3046012f716e526176f84928e0. 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/QMPKX1327589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb632c12bfab5e0729dbb17da5f6a6f427e8c0b18f934eee928e2325413ef4060. 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/QMPKX1327590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f844fb778130ad5dcdbf3044ed454cb7f183f5d3276d000b39b34a6a9020933. 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/QMPKX1327591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710fe43751b2466cb59f529249bad1f3d48f51c73c066c617beaf5534b28aa49. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QMPKX1327592.
Variatio 24. Canone all'Ottava. a 1 Clav.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9df1afbbd932f27c1772e94a662b12ad32fe7a3cd56a95f98718fdfc9d1a632. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QMPKX1327593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd92cc6eda4ef9d99dfda9259b45dfc64643205139f01b95d5c83efdc77e3fa. 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/QMPKX1327594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcad617dad3ab4e7c5bad8c9be53aefaa62a1d83b789565acc4226d50799e048. 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/QMPKX1327595.
Variatio 27. Canone alla Nona. a 2 Clav.; Variatio 28. a 2 Clav.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890cd35fd87d50891bc78ee83de5922f33c5a615a9fc4095c1cf05b0bb9d98a2. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QMPKX1327596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305bc35702775b733835419b6250907fcf733af13be12e5628529859a94360dc. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QMPKX1327597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d5fbc57bca9b041a7549e842f98d20c6d5ded1b27fd24cc84dbb9d248687b1. 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/QMPKX1327598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568e4c6f764f148e045ad1a43ab07bcd3db2af0fb4bd9d6496dab740799999d3. 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/QMPKX1327599.
Ultimate Debussy: Classical Masterpieces