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 0x0bbac98e8ace8a3f4394d1f26e4b384219902fdf62ca974f00f327ba085dd63d. 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/e1b33bd0-7381-4e07-af98-7bcb448f629e.json and https://artists.proofprofile.net/proofs/artist/e1b33bd0-7381-4e07-af98-7bcb448f629e.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 0x517ff71c2d7533df137914cf0821cf76611dfbf3fe42d38132b7d50bc0ab0588. 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/BRACT0300644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7764d2bb281c3543dd935e5d7f624ac31f5371efc78c4a19e8fd9b5c7f9b4311. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BRACT0300647.
Festa do Músico / a Princesa e o Pobretão / Batom 24 Horas / Dor de Cotovelo (Dor de Corno) / Cunhado / Na Hora do Sim / Tentação
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e63f512ff65a9ca9dd24d477c0c8ca21ac1a230f35e541faa9750e80d6d1e1. 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/BRACT0300650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86c9731426ce702ab66e16cdb92d77c529f30b891055d9ee48467ca8de3671c. 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/BRACT0300651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99addfbbba7299d7fdf7a5059c6a14c04a4e387437f6ee67bcef45da27044645. 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/BRACT1604613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2273513a2aca15fdc567d8e0f941ace309e28ccab51c0aaeccfdb068a9ec600f. 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/BRACT0400454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc7fa14e37afe7fa35c2fb1067b9facec858bd0b898ecb40b1136491aeb0b34. 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/BRACT1603484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a29829660d0beaca5418eccd1991375f4f37cba7b72abdd2d388c6c07600724. 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/BRACT1603640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd512b881cec5ebd23dc0a5752534701f856848dd5d6c04422f0f05980fc3ce. 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/BRACT0700883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5ae3bc34fe76e9ff79ea87d6b795019b2f7291593e166b9a6534840b22535a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BRACT0900888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512f8a0567861e0d907be2e14e8b2bad097a0a6ebd1b14810887f617bfd25616. 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/BRACT0400443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aa2f5883448a6ce37326f363245514ce2218c610e0b872d9b80f9c9ddd75aad. 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/BRACT1600295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9566179a0f92deda963354cd029a4c3ff228be9a5b1c74839bfc2ef2c9bdbe98. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/BRACT1607035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8034cdeb5f1075a812ab9845af966453e3d9fa06383972118e0ca0c9f0151bd. 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/BRACT1603315.