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 0x8e0cd45ec1cd4d85626b47eb7c19adea6066f840ef67d865bf6530ae11848a6e. 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/3db9f62c-9abb-4b7a-a36d-882881584f24.json and https://artists.proofprofile.net/proofs/artist/3db9f62c-9abb-4b7a-a36d-882881584f24.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 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 0x1f8229fa1ab2233af07553d8f9ba18a4f79672f31f1ca28511e057bcf3719614. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/BRVLS9600644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83328e3a937b6e24f75e416c3d8c0a8b3afced9211988aa130c73497ade860a0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BRVLS9600650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39689a74282bca42185cdd351924022bcae260b1f5c12f3df4cc77b2dfda977a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BRVLS9600654.
Caipiríssimo (Clássicos e Jóias da Música Caipira)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9118528bb9c4660941323ecfec91d09e813f826ff9fa60666c24e87308dadb0. 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/QMFMG1358433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440a7a78feb40116f5c7454941f6b32280b624c18291a3d1ca73e5671b984b3e. 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/QMFMG1358437.
Suite das Mocinhas / As Mocinhas da Cidade / As Mocinhas do Sertão
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002285b7ad55313244cc68ede2c2a928e39e79acc23e2939fce3adbe557e735d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QMFMG1358448.
Suite do Trem: 1º Vagão: Trem da Gerais, 2º Vagão: Maria Louca, 3º Vagão: Zé Granfino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3936508eed7b7e3b019f077ddb4c3608eb395111e22063e4319db7a5267002b. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/QMFMG1358449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f02f7938cf7e37d6c0814fd57f49168a82daaf662942236b4c5a11fba53057. 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/BRTRB0600057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4356b625a99f6575bce864c24123fed924bad30903232fc20117364b8e0b65d2. 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/BRKUA0217301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4b2c1fdff2d7594c0928d74c48acfd142b3c1906d077e1fc544c0a046c29c7. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/BRKUA0217310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f90c61e1ef909fce193c81510380914b76267e147736e19f735f6532b26242. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BRKUA0217312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e1b6751a7af8145339737cc6d5ba842632881b55e5be137de5bba334f5ee86. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/BRKUA0217313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf415843384d0a844a2f039c47de9bb1d446e6b7ad4ee2e9ef84f06c9da7845b0. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BRKUA0217316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa0e5309b6a2467ad9abda62b406b073919f2f2d9de20b41a7f3139c2f5b15f. 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/BRKUA0217317.