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 0xb97814ff656c2ee6bea36f7c62e157b0bae69a8a11cb91130ba4e9f3ddcdedfe. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6c1efdf-5dc2-4cb2-8bfc-3f9602815359.json and https://artists.proofprofile.net/proofs/artist/f6c1efdf-5dc2-4cb2-8bfc-3f9602815359.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 0x657ce2b9c012142494ef8c36075de28469e8002d56e2953fcc177383fcef6615. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BX4E52229695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22260dbdaebbf93bb166bfebb24975c299c10dc54147c645d3a947e785a70a4. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/BX4E52229696.
A capital do forró - NORDESTINOS DO FORRÓ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf109a8fb53113079f978f0f26d86003d0a4b63c35f51b4d77f92bb07980ef87. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BX4E52200248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c33075ad4a164a3393150dd0b3b70650d801872f4d5808e98a17e5a9d2b702. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/BX4E52200250.
Proibido cochilar - NORDESTINOS DO FORRÓ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251f4529f198ff5e4157de241381259c4ee80879f0ec36efb18a4af46762397f. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/BX4E52200251.
Numa sala de reboco - NORDESTINOS DO FORRÓ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5fb64d4a81d6799805ab7aabc86e30e8c6e41beede5b8bf342c240f2f27fc4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BX4E52200260.
Vou te matar de cheiro - NORDESTINOS DO FORRÓ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e3684210225a9de8ce1826a49d2865224dbeebcb949901808de854c4eef14c. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T16:21:30Z), 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/BX4E52200265.