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 0xd731d01a02c7409ac0b090078ef44b1ae569464a9ffe7eebe6451b7c70d55421. 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/7f9be3cd-734d-4c28-8fde-0b1d69a7e057.json and https://artists.proofprofile.net/proofs/artist/7f9be3cd-734d-4c28-8fde-0b1d69a7e057.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 0x5c15285023bf475e8e54f595e0cce0e347be4a2dbab277d4f9631bdb110d3a23. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/BRMKP0300612.
Medley - A Alegria ∕ Dê Um Sorriso ∕ Eu Sou Feliz (Playback)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb96bc96d9ba9f9e92ae18c5b5d4f800b640a2c57ceecab6ff9cfc57278813b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRMKP0410143.
Medley - Caiam Por Terra / Vem Com Josué / Posso Pisar Uma Tropa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d26c1310ee959bc61e804a48156427c1060b6db61d56a25af6d6a1966b3e7f. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/BRMKP0400403.
Medley - Nada Vai Me Separar / Eu Navegarei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97426095f3c0f4dc18d0d6c1dd4915a15c6a5104718a1bf8b3c898f490be99d8. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/BRMKP0400405.
Medley - A Alegria / De Um Sorriso / Eu Sou Feliz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5810721b0e86e396a3fa3b3fae6118eb64f90f1bfcc523dc55128ce23a6bc6fb. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/BRMKP0400406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x355c1b15cf7026bc091f0dc7f2337cbad10765009d5ef4784bf8b46088a57d5b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRMKP0400408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773d8d6284a170b2128d1e01c2a1a3ef0317f3f54052d69592c473bf7a307a8d. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRMKP0400409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca3a31e813d70561c8782d523d84ccd7f3c7e370461c95ed92980e606888929. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BRMKP0400410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3925b218434d2b7865597742b320cb0c8a6e8f955905e9d895980e1d5a0e87f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BRMKP0301229.
Medley - Nesta Noite Feliz / Basta Que Me Toques
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6b552841e83846649a1e91829957fe089807c2f8f75f8eac703456290a6378. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BRMKP0301232.
Medley - Tristeza Chegou a Hora / O Nome de Jesus/ Alegria do Senhor / Deus é Tão Bom
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a39eb9e921a82e497a15f0b2edc7e315781b3475827aa71dc6d93b7f25f871. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/BRMKP0301244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea06187bcf1458ec073b6c34e91224b42d75f0c1e673374f6cce113b2f46dcd. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BR4GA1100101.
Minhas Canções na Voz dos Melhores, Vol. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8b386ad71902f1e4758a94692d5a1dcfb655d64f8507a68c90ed40861d47643. 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/BR4GA1100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec56773fba965219944034e5f4ad7d0c58d49c44583fb41b074b51222a149161. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRMKP0300398.