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 0xe0fe888495d05e81d38d5ea8b84fdca4913061134ea2323caaa91a9934970bed. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/729c5558-30c9-452f-a7d4-fca6c17b01ab.json and https://artists.proofprofile.net/proofs/artist/729c5558-30c9-452f-a7d4-fca6c17b01ab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Carnaval de Viena (Erudito) [Inspirado em Carnaval de Viena Op. 26 de Robert Schumann]
Bem Me Quer (Erudito) [Inspirado em Romeu & Julieta Overture-Fantasy in B Minor Th 42 de Pyotr Ilyich Tchaikovsky]
Nem País Nem Paz (Erudito) [Inspirado em Symphony No. 3 in F Major Op. 90:III. Poco Allegretto de Johannes Brahms]
Três Sinais (Erudito) [Inspirado em 4 Impromptus, Op. 90, D. 899: N˚ 3 in G major de Franz Schubert]
Caju - Canções de Cazuza por Marcelo Quintanilha
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 0x55ae22c63c094dbcc4f8e3400a3f6dccdd6521ad00300f687302c25b8b97e8de. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/BRAGL0600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131e0b43bc2e5df468f159a446a9d94d6c6750f54d9a5589a2c2fc1e4d77d6c2. 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/BRAGL0600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad55f5b1fe521e155249fd44a28d37df11feb12cdfdd7695d7bb03ed25c10de4. 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/BRAGL0600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc925e525c029fc5216d7dc5650c82213051d0245349ab12bb29886021bd40ce. 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/BRAGL0600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c50ff079a4b34bab792cc740b06835c14016616e4f57019246fc22424aeef3. 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/BRAGL0600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf96dd88c7dbc9be27f6dd70dac31d6ca6c9ee5e2b4ee78b432dbc00e3940515. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/BRAGL0600010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea97220b1a8f3946676995e2e05fa41a5d08d7a23f960a7565371926455f3f06. 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/BRAGL0600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ef6a6b7427f82b50188b766a063b1353aa0dc274dcd4bee045203e4a96cbfa. 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/BRAGL0600003.
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 0x7c702b7ae7c9ad111072d87c6024c95fd723ffd7a5df1bad462d1f5628cce566. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRAGL0600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9785d6b0b8507987e93dd85f5725ff37d4341db0684c020f833f463d73a60e7. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRAGL0600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29231cb60400d6320cc6740a7596ae7a72c44a219a2abc3daa6941543bff9792. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRAGL0600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c299291f853dacdb7c89eac1457e0c5975266dcd826372477d458a0a23a52d. 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/BRAGL0600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394fe9d894980821f1feb1cfb03e0ac576cc23addf0006a0257ca4eca31b9dd9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRAGL0600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708ece09b73764cdb4c28c6ae026723eb63f5d18c6d770a5c0ef156fd58f636f. 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/BR7DD1100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80530d06a4f91a685990469ad41c3e7d32527e644c06c138094c332394cbab46. 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/BR7DD1100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7097160f0ce91806664f122fdc0220c95bdc335d6b81c957ac583a9af277740d. 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/BR7DD1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa209226ed2b644dd748b2f19448b205b3e78be1b189e40e1c348934f2f419664. 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/BR7DD1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fee2a2cb855c1e90ee61ae88903aaea2fb8c217b3f72f24e2bbb9fe253204a. 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/BR7DD1100012.