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 0x5848206badb594464430f70d2b9ccf8f2249690ea3478b10fec5d7f0609874d0. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e89129a8-6499-49a4-add6-6e5256140f3f.json and https://artists.proofprofile.net/proofs/artist/e89129a8-6499-49a4-add6-6e5256140f3f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Pássaros - Homenagem a Chico César (Ao Vivo)
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 0x513852408e2989d619ebb48a5fef70b6c3a24953dcad465b70b02de58f8602f2. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRV3P2100029 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31fcb3df1ae470640bdf8c8421bddc945f6030476a60a448ebc84242c924761. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BRV3P2100033 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba94d122f0ca34abec0ec8237226ff8bdafe0dfbf1c85f2173ee143d52c6796. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/BRV3P1600001 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc285ed485aa12ef38c99259abb5e503283722af719ccbcabf36944ff52136383. 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/BRV3P1600002 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27f71ee8adb48e8f748c26ac3c22d88fae635d456fb5276d82bd43501bee8ea0. 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/BRV3P1600008 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bac554c441b85b4ddc6af42be084949bb3b5c5241b0b05ac633ed55c877331. 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/BXKBP2200120 — a six-check JSON result.
Bim Bom/Citação: Oba-Lá-Lá/Citação: Amálgama
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9f089ff1c48ae5f67395283984458a097371428342ea18e5edff5ad0a3f924. 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/BXKBP2200123 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645789d2ae9ffcc9006ba0e4cc8e23b7868798df37e50afea92db706da7b47e6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXKBP2200125 — a six-check JSON result.
Aquarela Brasileira/Incidental: Um Pedaço de Amor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa570782f29b1276f67bdbd791d9d6549019233e98c870add309a0c8f8b3bd8ea. 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/BXKBP2200118 — a six-check JSON result.
Deus lhe Pague/Citação: Rap (P) Agatha /Citação: Dívida Histórica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97aeeb5375a104e45f6424e70fe74cebd226cfa70dd266518c0672adcf76fbc6. 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/BXKBP2200116 — a six-check JSON result.
Para Lennon e McCartney/Citação: O Vento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00717dfdd46f0caa885f6b226028ae2ca9e3e04ff8ba12af70519b10e0ec70f3. 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/BXKBP2200117 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7519f748036632b3a081a6199c4e60b648d4665fa81065a282d49ffc285bc1. 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/BXKBP2200114 — a six-check JSON result.
Medley Nanã (Coisa Nº 5)/Honra ao Rei/Dança (Bachianas Brasileiras Nº 4)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cffa2364ef0cde021634a6b7ba0bd0e4d17aff6dd1c2468fe81f3d17e45feb. 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/BXKBP2200129 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca6737d99cd3d8dbe33739e4359484c143e3680b563533e7aa0c95cf873435cb. 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/BXKBP2200119 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbe405a3072dc5a02ee20d51698caaeb6c5522fa7f36e1504d6dde00e2c8879. 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/BXKBP2200115 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29100014a1d4c02063b58c21537753a8315a4348fef21af05976a97f6f5051cc. 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/BXKBP2200121 — a six-check JSON result.
Samba pro Rapha (Arr. for Violin and Piano by Francesca Anderegg and Erika Ribeiro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd51951fd9c5bead08b1f5fdbb2eb2877500528e9df9d9329b691046a569a3da. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAQT2401801 — a six-check JSON result.
Sonatina in D Major for Flute and Piano (Transcr. for Violin and Piano by Francesca Anderegg and Erika Ribeiro): I. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa574c888d7a28dd7b2ac20a33ceb1a06ea5c76b4902e88eb71f52188e87f2059. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAQT2401802 — a six-check JSON result.
Sonatina in D Major for Flute and Piano (Transcr. for Violin and Piano by Francesca Anderegg and Erika Ribeiro): II. Expressivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0a096a78ce5f93d9ddc89a3a7c3d645b65bd2b4597d0d4cdd4bb196a3897041. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAQT2401803 — a six-check JSON result.
Choro na chuva (Arr. for Violin and Piano by Francesca Anderegg and Erika Ribeiro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be1b9e8c391f089de06f45e5ce9ac0a9e33830fd0e48fd0768110f80f3ea0e3. 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/QZAQT2401805 — a six-check JSON result.
Espiral (Arr. for Violin and Piano by Francesca Anderegg and Erika Ribeiro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e0277c57d844b1c0a25b46862f94e0ee4ff6776265e14088fdcdbdb22ad16e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZAQT2401806 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389b8d457cded3f420a6374e90b8128953c62a314c03464c35898761be5fe638. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BXPN72200003 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x423d82dad658f3c6e160ce3c2fca5de3684f1be4fc6218a15bf0783abbd0bb8d. 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/BRV3P2000035 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860fb654cf3011fd2c5afac8793a89081c345aa3e56d53df7a11bf3cbbe7722b. 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/BRTKD1700002 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6baa91a79172b1d106c7e8f9d1c84de61335e26d2aac14a8c6393c8b15e98e9. 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/BRTKD1700007 — a six-check JSON result.