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 0xba0904e283992f905e22f9b1a9fab691a9c2be77f1d64218345bf526aa192620. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52bd9937-03ed-4ea6-acb0-dd3af7ea3949.json and https://artists.proofprofile.net/proofs/artist/52bd9937-03ed-4ea6-acb0-dd3af7ea3949.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 0x597c1dff4a44105acef05636c281556bb5c29fcd727d49ae91ddf5ddbab4ca31. 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/UKG241800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2150a60b6b855f67e7ae82ed6fbd772536197c4fede8ed282dfd75dcdc07c798. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKG241800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730ee16e9f86582cd670380f2f5e21c8e143c979147c0a2ae35e79ce0bd356d7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKG241800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab31630b91d3c3afcec6848329e44b0a749608dabea56c7e258d2ee60aa9159. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UKG241700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33277871274db21aa528f5987ed45334431a68657771a60525bd20b5ae2fdae2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/UKG241800026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c5776b6abaedc309e32bd5b3aef7f69dfc014e70a5e80e56f9be0c75fe8b4a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKG241800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6171ea11675037af5064b81b7a4a65ee1413d4a12b43c038cc7e2cc06d48e62f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKG241800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597c1dff4a44105acef05636c281556bb5c29fcd727d49ae91ddf5ddbab4ca31. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKG241800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab31630b91d3c3afcec6848329e44b0a749608dabea56c7e258d2ee60aa9159. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKG241700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad673a3c8b1e64ddc45667f86c409d26ec349bc0f892911b912026cdb3021df. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKG241600006.