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 0x09ef1079b7020e110cf41c10eb7dae1054722481988659fb4869ad2d1051bd8e. 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/d37b6893-e226-40a9-8f6a-edf495a85ad2.json and https://artists.proofprofile.net/proofs/artist/d37b6893-e226-40a9-8f6a-edf495a85ad2.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 0x181d8c077c07721f47229a6ba0261ec6a224715c259ae6f4ebc1348cab6ee587. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:17:40Z), 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/QZHZ42100101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fd2ad001969620bda27795f2eeda7a589a1aa5dd3fac2e411389014f5f7596. 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/QZNW72338146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cea26f1a15631b790aaff596dbf23936f603ebedd64c130474fcf1cdb37d0eb. 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/NL8RL2460608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e265879aeca35e068df7bbbb66cc44d474235e8a424be68253e1420fa5dcf0d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:09:00Z), 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/NL8RL2435363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ffdbe9cf9195514558022d0746bca1caecdde6dc4fcc07bb1a7ad7360b75dc4. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:13:51Z), 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/NL8RL2439023.
Canto LLanero (si me ves llorar, Ni Siquiera, Por que me haces llorar?)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d20d8d693b3a0e3899d7043de7c987dd1730b87551380222d74a6ceeec1de4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NL8RL2531892.