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 0x62ce9e22ec6f4efbfd993aeb8538accad84b4e2f7752eb8f59df654033976067. 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/3c3cb386-130f-45a7-ae9e-5a2787b27996.json and https://artists.proofprofile.net/proofs/artist/3c3cb386-130f-45a7-ae9e-5a2787b27996.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 0x29cbd2667835f56ffd03f7cbb939203a876a4775251031128ab18f57f258f6b1. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:47:17Z), 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/FR0D89900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfacd169b32fc6fd00e9c23195766e77c2ffc97af3b992e963c66cfea593da284. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR0D89900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65fe369265babce3cdaffbf6c3d863179af4d3224d821aa3afd710e2a0bf418. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/FR0D80100330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4fbeac7cd218816a2c9569773b7527be979e48f9800b39869941eb0caeb9bf9. 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/FR0D80100430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc02c24b849851b1977ea679f0db8bdfd644c3c809e04c81fabda5af2839fa7b5. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:51:19Z), 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/FR0D80100450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2360526062aa826497a6c94dc9f02151f4721dfeda2b0500c60c2e4a7af48d20. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FR0D80600290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3425c82fc8cdabd5cee3282db65fe68062abbdc71272a5b4f25f1f97780afa86. 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/FR0D80600480.