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 0x3711e34e8b9b7d54a5ccf09df69dfc97df4643dc0f6b954c3f78b018652fefba. 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/5b620cdd-e019-419a-83f6-f20106db0c05.json and https://artists.proofprofile.net/proofs/artist/5b620cdd-e019-419a-83f6-f20106db0c05.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Elegia: Virtuoso Guitar Music from Brasil
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 0xc9e9e88fa5f944e29d0ed23880372040cac5992732b68eec1b982877c4a32cd5. 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/NLA460611065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f8e9200f9a6a7e6aa9d7a01ecc5ed895047f90833315253aabd46ff75aebad. 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/NLA460611069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164ce7864698641bdfd825a1c012215232051754d606a97bb828254a98cb9985. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLA460611072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f756ab737c4252f229be56f3d8ea987c666ca500c65eb362ae68ee2d2072e4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLA460611073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f483031b49e7154c6d3e28b40b34b7f39a85bc098d26c2c262b8ec94d5aa67. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:27:03Z), 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/AUMEV2156605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455983dbee03cea0df0d08029d722d4bfce68ed432c376a7d963f4766735bf76. 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/CAHQJ1991762.
Panorama de la guitare. A World of Classical Guitar Music
Obras-primas da música clássica brasileira
Pereira, Villa-Lobos, Reis & Others: Works for Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cddb09ede3365571b9e943073d6847dcf9663fc8e45850788ea011f5865f974. 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/HKI191944303.
Jorge do fusa (Arr. P. Bellinati for Guitar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623d955c74c3288e0c331d30e991e79594fe64d88a0eacbbac1d2231bcd66b92. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKI191944304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7927be58b651cc593af44c26b5ff5935361dcc04f4a03dddba8234791eff982. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:23:19Z), 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/HKI191944305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795257001090630fe9277e22168d045af60a93c2d31c1df7656755625f2176e4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKI191944314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09a33d41f7875000c70d5d6a18eb7a69875a888630529fa84858a3523af1cc0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKI191944316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33d79574041b6902f3afc2fff771aff22b96b1f8fcbf134545a95029efad3aa. 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/HKI191944318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2c1847b3f8c6d6638c60cf1d0c837cebac3de876866528c5d2fb5c779e4c8d. 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/USHM11464901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f8c6cde8dedef7b38e86344bf46e2529833550a7e78bf3b126e1275c56b46d. 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/USHM11464902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f6b3e6d9c0634dd3955a82ff7474f27365cb42db621fbdd89f67ab2d69eb1a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/USHM11464903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbf8204184197d2c4c588ae2c90e520c4306363da7f1b066bbe8f30eec3e20e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USHM11464904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f486c7caf2a7e74a4e34f86d97311707af13b4be78afbd2db02450aee3c18f. 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/USHM11464905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2262bfecb8456d7673d16050af1d70ea03e6781d654eb4d6e94c4fe56fbfb5f2. 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/USHM11464906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5259af498b2971395118d64fe65c7bc527b4bc487e800224d6ac7b5ecaf195d4. 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/USHM11464908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49cd7f5d3b3059e4b48fd6d3835788b77e77d0b0c369b27282ad5871c8206ad. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USHM11464912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1756d9fcff7d67e5b78840999027265fa103044b2dfe022e66a95dab2ab496. 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/HKI190339201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e4a3b61c42d9d2ffcc0e180a6c1bb4ac7050ccf09a661650e48a84d87adfc4. 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/HKI190339203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe127a29a4d3764723247942837c45f77c787fc6c9ee33acc3d1a2a1ad08decaf. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:03:14Z), 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/HKI190339204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371b912d05aa0e6f8f63fd2d2a7649645a8a51563171e375da41af25769e404d. 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/HKI190339206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf510215fd6f99737f12c79836329201ffaf0eaa7dc77c3f9ceed11ab11184421. 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/HKI190339207.
Manha de Carnaval (Morning of the Carnival)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8adf027743048327e3e7f96acef09ab1919f42b746aa5a2e39ccfa19aa30f3. 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/HKI190339208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1313d63d8c74c11b29e3013cf210e8492e541150032a7c52b6cc9fe1544a90c5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKI190339210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bb7cd1486946ee9c40f13ac0dbd5956d5c157485f9cb8e73f2634f10a6d0dd. 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/HKI190339211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa77615985a5c154a9431865efca01f1a2e6feac91dcc96a60749ad97055b3f77. 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/HKI190339215.
Brazilian Portrait: Villa-Lobos & the Guitar Music of Brazil
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793ec51dfcefe03d30cbcc848917b3eb387d625030672c8df36046cb78efa6cb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/HKI199226801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9525aa2ecdac1e363d273ff57d369fef3b3f72f535a50990f30cb15f4a847bb6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKI199226806.
Violão Brasileiro (20th Century Brazilian Music for Guitar)
Passeio No Rio - Arranged by Carlos Barbosa-Lima
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f0160c615e44bc809b89111e6e33ef4b74ffd0a6f607242f02e3ed9c233c40. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITLF52005361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4831be2179d473a2f564770484967a509f5b4e2f2589c7986c683eda751ba40d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITLF52005363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x787f2a99ab5e4a4af39b6b9e9f27b507c0c2eda07fbf224333e721a38cbf7fb8. 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/ITLF52005364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38e012f8eb824f969d54d203a057da4cfb464890713d2ab67c1bce7ba5a864a. 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/ITLF52005365.
Inspiração - Transcription by Paulo Bellinati
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08b9a8d93eb24c67f3968deb70d94843203bb1f3d1df2c6f113c9f067e9e887. 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/ITLF52005367.
Impressões Brasileiras No.1: I. Estilosa, valsa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f7004dd2288d702c844b7c978528329d539be797dd2a53413dee6b53b0c81d. 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/ITLF52005373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6e41804f9312acebe039fe6907bc0176b4ecad7a982426d1c62a4c23f3489c. 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/DKFR91900103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fb70739372aef6da896ccef16822405edfe0dc7bbb36fb6003f4ea3c521151. 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/DKFR91900111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3237b6dc76aa8698a0804fd860f93bc007229cebeae9f04f6b5798c09c78d23e. 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/DKFR91900112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66dbb661858bd86a203852f182e288bbf425b5fc234fcbd3d96321945046e0d. 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/USESK1294191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8b6947642274bd80c07249f28994daf5ad1c90d3ae430e8834afe9cfb0935d. 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/USESK1294193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76bffeb51c5829bb9ee6768601e2b47ce9d7b29b36a52a41050a9a2c52a09a72. 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/USESK1294194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8505b980f2d3b2bb1551ecdec2067925fe2c972275177e4c5e20ada0beab969e. 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/USESK1294195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc551caa9753e0e8143a748d8321a038b03e8866700889c27308ddbf9e42f1bb9. 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/USESK1294199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a16f76dc3359242aa68d6ef857d6d98e30835e87f605d666d9322076d548b04. 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/USESK1294200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613616303b1a87f4aa2081bb264e9dab80c25860ab6c85d4ac9bd7b83e3641eb. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:04:02Z), 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/US4R31301658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6033e28e5926f1f324bed321243eca1877f94c74ddf763f88538b5d4f675811a. 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/US4R31237701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaec715765c15d1aad5e67b33b2054b094c3946638679a589d0299857cfb15f9. 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/US4R31237693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7542b94f93976280c8f7ce2ae7b95cbb8a1919d288b9e141eceaa6ac3976ba. 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/US4R31237691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73577e274fa6a4d8030d87b590272a59df4e35b43c4371811b02370aaff4e42. 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/US4R31237690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37ea560a2a0ac403f6a1138952fe57cc032c4c4a6cda3cb2e2f4dc1fa124c7d8. 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/CNUM71600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b09163c3a44af1967a9673bf2222295e1017010c1d8ca690bf7b2ac59493a6. 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/US66W1900476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9c46d4bdb41e75487edc41d365dfaf7a9ec56160e54193e78d08f2cd300e2e. 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/US66W1900478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7fbf684bb8190026338aa951121bd42fdf44499458f4c9aee995dfaacfe6645. 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/US66W1900482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02808fe513045442e76c226c22e284df068925dcac2f1f4e00e0b42500b1ce80. 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/DEHY11700992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a17bc6b3ab58c693d312ace640780e4adacb43686b76a8ae4b3d367bcfd77a. 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/DEHY11700995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526463af287850e3f23209d6783f7cdb9b393b94a77605a4926689081faafaa9. 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/QZ5AB2247796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c72dc144ecc37cc0323c046a12579f45c41a4d9a6ed029e482af9bbc578f9e0. 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/BRNIK1500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67af21c3ccfc23ddc46ccb6b022f0a15f71bc94619339c5c8c5a6f8646542704. 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/BRNIK1500032.
Guitar Exam Pieces from 2019, ABRSM Grade 7
19 Chefs d'œuvres de la guitare classique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6572e7ce49ca9072b7c1edf428d55e55642c08f97a220608428d81c8ca8a45. 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/IEDWM1800007.