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 0xc8efc87357b9fb564b70cd2d91c399931dee8c331ada5a0f8aef3789854bef4a. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/841f8e20-ae16-4bb6-98bc-d335335dfa3a.json and https://artists.proofprofile.net/proofs/artist/841f8e20-ae16-4bb6-98bc-d335335dfa3a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xce39bd793e8b79cc1d257f1d23609e35873875ba52492db9ddca083a3210895e. 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/BXSVC2300011.
12 Valsas Brasileiras em Forma de Estudos
Bach, J.S.: Overture (Suite) Nos. 1-4 (Arr. for Guitar Quartet)
Overture (Suite) No. 3 in D Major, BWV 1068 (arr. T. do Amaral): II. Air
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a175d455091c12ac7b10b55711c3f72318c09e7df1fbe56cfcd13bcdca62f2. 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/USASX0825402.
Overture (Suite) No. 2 in B Minor, BWV 1067 (arr. T. do Amaral): I. Ouverture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085cb2ded098f7fa7d1c1f34b9c393c2047a22c31102018571266d5e264b3ec2. 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/USASX0825406.
Overture (Suite) No. 2 in B Minor, BWV 1067 (arr. T. do Amaral): V. Polonaise - Double
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4038904021e81f36abf36bcecdd78df3f09647cce5d69d71300a45762b634b. 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/USASX0825410.
Overture (Suite) No. 1 in C Major, BWV 1066 (arr. E. Gloeden): III. Gavotte I - II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5e9b48572306b9c4dfce1930c3e723b5426d52a80c41306db73a3e86e16b04. 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/USASX0825415.
Overture (Suite) No. 1 in C Major, BWV 1066 (arr. E. Gloeden): IV. Forlane
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2120ef292314b54f8c24059f74a3b1d539713d09f947750454f252fb43c462fc. 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/USASX0825416.
Overture (Suite) No. 1 in C Major, BWV 1066 (arr. E. Gloeden): V. Menuet I - II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda8099153139514baba351609a982bca1721e318f43a59dc9627c309fb417e04. 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/USASX0825417.
Overture (Suite) No. 1 in C Major, BWV 1066 (arr. E. Gloeden): VI. Bourree I - II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80aecfed46afe33a40302e252e409d50e0a0c129f493f36da002e624778fa840. 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/USASX0825418.
Overture (Suite) No. 1 in C Major, BWV 1066 (arr. E. Gloeden): VII. Passepied I - II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf218e8c6e49946cf0f0fd8f16bd272d0e250595b801e0478f19312b41d91c4. 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/USASX0825419.
Overture (Suite) No. 4 in D Major, BWV 1069 (arr. E. Gloeden): I. Overture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976c3d639d6227ae83e83694d506a2c98d9b0dfffd9d93bb3fd6d8a6325c8b9b. 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/USASX0825420.
Overture (Suite) No. 4 in D Major, BWV 1069 (arr. E. Gloeden): II. Bourree I - II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fa7eebce845a9d0414e23f98465233d3400923cfe9cf7bd0c90e18fbc70dc7. 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/USASX0825421.
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
Overture (Suite) No. 4 in D Major, BWV 1069 (arr. E. Gloeden): III. Gavotte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d26660bfb895c5545aa13f1063402e26281a6f521a0f48937b88eb95cf4ffd. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825422.
Overture (Suite) No. 4 in D Major, BWV 1069 (arr. E. Gloeden): IV. Menuet I - II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2eecd0ad1f68a1bee699dee5ac8077d036fbe636d44df8ebf4ed94ecdb077d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825423.
Overture (Suite) No. 4 in D Major, BWV 1069 (arr. E. Gloeden): V. Rejouissance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748d9fdcbe584da228df564b0eb69edbbae417bd9a3161daecb311c211d715b7. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/USASX0825424.
10 anos de Violão Intercâmbio - CD Comemorativo
Villa-Lobos, H.: Bachianas Brasileiras No. 1 / Guarnieri, C.: Danca Negra / Gomes, C.: Sonata in D Major
Miranda, R.: Variacoes Serias / Santoro, C.: Frevo / Mignone, F.: Lenda Sertaneja No. 8 (Encantamento)
10º Festival Nacional de Violão de Guaratinguetá - Dilermando Reis