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 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, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXSVC2300011 — a six-check JSON result.
12 Valsas Brasileiras em Forma de Estudos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa851497cefb410a322b057bced912a75c67a2f20c131e919206949f067531020. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BX36C1800003 — a six-check JSON result.
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): I. Ouverture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc2420b08d5af872153967306d685227a4bbd1e87654193c4221cfaaa8e9caf. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825401 — a six-check JSON result.
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 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825402 — a six-check JSON result.
Overture (Suite) No. 3 in D Major, BWV 1068 (arr. T. do Amaral): III. Gavotte I - II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164b1ca63c4b5f5fa77c098eefe9839f2c3ae83aef17c06b00cecc661cb49126. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825403 — a six-check JSON result.
Overture (Suite) No. 3 in D Major, BWV 1068 (arr. T. do Amaral): IV. Bouree
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5d000ce28fbd69bbe46b385905e5086c311900f68c4fa527820f196b84cbb6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825404 — a six-check JSON result.
Overture (Suite) No. 3 in D Major, BWV 1068 (arr. T. do Amaral): V. Gigue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b54f323482f0b15bb0d7c3d2f11612f25b8def077311f714569aa4e52b6da3e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825405 — a six-check JSON result.
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 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825406 — a six-check JSON result.
Overture (Suite) No. 2 in B Minor, BWV 1067 (arr. T. do Amaral): II. Rondeau
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bae0d0725f018ef8363f1b7a82f08995907a1a2f36d57cade130c6a999b88cf. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825407 — a six-check JSON result.
Overture (Suite) No. 2 in B Minor, BWV 1067 (arr. T. do Amaral): III. Sarabande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78840d823a419fe2ed4e77d6893e59f51fdab7088d588bf613599fcc5d4a9cf1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825408 — a six-check JSON result.
Overture (Suite) No. 2 in B Minor, BWV 1067 (arr. T. do Amaral): IV. Bourree I - II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeda67f412d2778332b7a6497f4d9fdb17ef2abc9e985caf26747250ea028b49. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825409 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825410 — a six-check JSON result.
Overture (Suite) No. 2 in B Minor, BWV 1067 (arr. T. do Amaral): VI. Menuet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e274c7716c79123fa9de9c6c1430e60d80ace5b1c7967a511846cf0995b325c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825411 — a six-check JSON result.
Overture (Suite) No. 2 in B Minor, BWV 1067 (arr. T. do Amaral): VII. Badinerie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1468591aa7198fb9e08ecc2cac10002bd30d0a232d1dc030721bdb4f7e32ba. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825412 — a six-check JSON result.
Overture (Suite) No. 1 in C Major, BWV 1066 (arr. E. Gloeden): I. Overture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0217cd89c68a00f6cab50b4cdfb6fc531d1bf6bf468e4cae6399faefcf752654. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825413 — a six-check JSON result.
Overture (Suite) No. 1 in C Major, BWV 1066 (arr. E. Gloeden): II. Courante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fa3b641b2da72ec6e092de3d9b38282bf392ec83f08922b8577d9382d05dbe. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825414 — a six-check JSON result.
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 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825415 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825416 — a six-check JSON result.
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 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825417 — a six-check JSON result.
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 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825418 — a six-check JSON result.
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 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825419 — a six-check JSON result.
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 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825420 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825421 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825422 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825423 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0825424 — a six-check JSON result.
Lute Partita in C Minor, BWV 997: II. Fugue (arr. for guitar quartet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x005949065e159446c338c3910c3fb925ab7474f7eda25c420a9e53f905de0f90. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0625815 — a six-check JSON result.
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