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 0x5d0411e96b4463dfe6eb4c803e21d991e77e819c8c96e13b1d871e0d7c0b4669. 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/3119fdee-d231-4730-991d-67fe5fbea281.json and https://artists.proofprofile.net/proofs/artist/3119fdee-d231-4730-991d-67fe5fbea281.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 0x896c9124859b90f8593435f4c36e21e36a3d6bffa89691a1c38449216e995074. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QZHN31955254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac40649cc9d7786afc27569d103f45dd7024ffabd740efd7dc8d0ab81b2e81d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:37:07Z), 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/GBRKQ2481291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dba55776cbd70f9d172d125ec664dec9d5474d414f083801a4d5422f0afda02. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ5FN2479731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e05cbc3b924f3c387b84cea26729d97cf9b04e0d9e249f000da2dfbec16db9. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:25:53Z), 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/GBRKQ2492732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40b2f039d1f565b8f656ced484fa8d68c0f97af8fb91d7ecccfc23a206d0251. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:35:21Z), 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/GBRKQ2492752.