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 0x82b5b4e7db4746a059002340c46dce54948037e1ad21113f399d81b70204e813. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c13be1b2-febf-4de7-992f-9e27414b9737.json and https://artists.proofprofile.net/proofs/artist/c13be1b2-febf-4de7-992f-9e27414b9737.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 0xc563fb6096a06db16a1c65b2cb0b2adc90bf3549e12635a802e20613dfaa29e9. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:21:14Z), 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/QMDA62189686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f14d85757725bb9cbd9544e759fc6580d3d391de28070a9211847758de7f59. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QMDA62189687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4100518e1c68feca6808653b809f87405d3d515d1f13632bc96bfed52d0a05. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:51:28Z), 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/QMDA62189688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25876e1e1e06fe930c6179ee128d8786faefbbf08fc6e90a5fb13d0a8b29e42a. 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/QMDA62189689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f7431811b48a549a17de58890973d89b9bde2185790ceb15ea518135f5b4b0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMDA62189692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57afd1b6add84aac824d15c9c0e0e22e24c6bb676ac5dd75db5d3c3cf62f2049. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QMDA62189693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb302497953a8499ed918d944117471b19a54a1a379fb8dfa79f6206f891d3b03. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:42:32Z), 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/QM7282406503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93820e4f5124ac3e804ed40a4bbbe334aef10b8775581501460b2063e56f4dcd. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QM7282406504.