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 0xef7bfb4ae588c4307d7c360c539066f3d2aa010308035ef6cb23cb293abe0875. 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/3ee0babc-cdb9-40c2-8451-4c718a01f45f.json and https://artists.proofprofile.net/proofs/artist/3ee0babc-cdb9-40c2-8451-4c718a01f45f.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 0x1dac7c076d7489cdcf2505c1032e193d8d4a45af4ac6d03c7579f9014dac88e1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/PHC151800251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cfa047e93c33dc998fc736801d1d7ea33707d307dab92bb7a5e2b6101566a2. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/PHC152000469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b95e83999895912980441c66825a0ee07a01e91bdbcaf69115450ed3df9783. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/PHC152100509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205261ef692435b44988c5274a8396f434c7b4424d8c73fd8f3f081f6add0511. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:03:44Z), 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/PHC152000458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b98ad295d9b047ad5c6da872b24ba9a22da8a6aadce8cfc791fb2690336c3f7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:15:43Z), 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/PHC152100597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b605ccd2d5daea6c42f4a47f072a8ec975899686d136432d27eab2588ed3d1. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/PHC152300823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b4c41b4750b4587fc38258239ad6f8bcd31296ec92b790d044eaef13905adf. 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/PHC152400838.