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 0xfaab73345553ee0ca12505748dea32d903b44b044aab1922b8dc4f8efe72f284. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c589404e-6e57-49c4-891a-f01a26c6647f.json and https://artists.proofprofile.net/proofs/artist/c589404e-6e57-49c4-891a-f01a26c6647f.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 0xd3b336212a5e933c4095fa8190981109fdd98cadad72cc318c0b40672b3684db. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/BRUSA1900953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428c434aba93982aa072cf071d49a6378c45f3a42da86aff79448e84a30fa400. 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/BRJPA2306000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe454b689a3b8ed5f3f0c64e8b7e6b18d8221adf883db201ff2a1ddac48cbc26c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRJPA2306001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf98f6d490c7ebe8e2596b2e68941ee2135788ee0861527edff0390114c141c. 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/BRJPA2306003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa185c19dd43b3c490624a504ff945b8b6b00afe68163bf85bb52c9e918a86647. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BRJPA2305207.
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
Caminhos de Santiago - Nenito Sarturi e Convidados
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da28833af72152bcadf7680811395f21024551f9556d15d58b5dbc3176d1b16. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:43:34Z), 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/BRSF70600012.
No Braseiro da Saudade (Canções Premiadas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0388e4425ced00739d972d44576ebde072409cf3a164d59047e93730608c3bc1. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRF2G0900079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12ffd5cb0c78ec4416ae5592db498b8f891fba02dd5db4c9281af3dfd9ec7ae. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRF2G0900093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea0f490cc36b293e7349f9d67f234a809bef7f27a3c132f19e1f28e55d7884c. 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/BRF2G0900080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912e14ccddf4175fec8322e1c420a8c3c029ba3ee2c8059ceba0d1045d207e88. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRF2G0900082.
Meu Princípio - Eternamente Gildo de Freitas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4da458db59a01bf80d669762e83cce9dec15ae39894b3013200471ffe87bc958. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BRJPA2400052.
Festa da Uva 2010 - A Festa Que Encanta o País
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96530bfe2bf1a335a200af8e9333b7dc00ed78e2d73dcb4bf90befee1049e179. 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/BRACT0700319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060b78650bad7de683bf7efb47450c8baa310ae0aa397ca6c87abd0de8cb56f0. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRUSA0500521.