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 0x581d31405dc32eb57b20bdef2d806081a709dbc8024df542748be5eee3ba4f27. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f62bdefb-6d2e-4ccc-853a-dca597860c78.json and https://artists.proofprofile.net/proofs/artist/f62bdefb-6d2e-4ccc-853a-dca597860c78.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 0xb447f586de8393439188401c8d12dff657c166f1a228998df5e77dadbc920458. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/AUQ9D2404764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6616cf04e65e218c3397dcff414e97c091fb356c64d038205447b83452a18cc0. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:07:05Z), 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/AUMEV2503226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247f0961fd48a2badbad3d562f9bbc8dc97a04f630e4f22d6b5e1f5479ee7aee. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T07:55:55Z), 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/AUMEV2503229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd958733f90df6d39e5e3c5b306e05d2debb5d918f13d235cde9c3b4cc528313d. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:07:15Z), 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/AUMEV2503232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa329ab977bca5f5c9d7cd35ad4e4531d7c26285c1db8418cd9af177f6e3a853b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAHE2361328.