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 0x92f567dedb35f495b6642f53f5b08dbb6abf19e46f49a20603f7f0902742a298. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dda8bc4d-c497-4ee1-bd41-c1db89adf6ce.json and https://artists.proofprofile.net/proofs/artist/dda8bc4d-c497-4ee1-bd41-c1db89adf6ce.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 0x07cff6581cc794017e56daf9407fe6cf8d9d7e78a8e32924bb1f9513b4344fee. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:18:07Z), 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/US39N1895602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e5a1ab15cfdff22bd975ef8031250b6dcea5a65bdb742cabcf5adec06d4978. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/US39N1895603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9bd554b228d210457fcce3f0285bd4efe069ccc7c37c938bfd764b8e40a79c4. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/US39N1895606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc263bf5412273eba78a5b596e19319fe54fa44fd787127d8bc5f29c27c4e8991. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:58:45Z), 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/UKLNX1900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808a412ef20c9b7883173e2a889ed28dc1e837eb435b82fee19d0e4adfcfdc9e. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/UKLNX1900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e97954bc14480ca926d1919ef08cfc33ed6b99589fa80cb37970dfbb4cf3dc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM24S2102484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17720399f5153c89195641647fda183b91eaca945d80d5383f53262d84dfa6df. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/AUBM01900139.