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 0xbe264a78c86b1e241475552d037b05d1f23af9c29f0f5e9c8c85600a02bad3f5. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1893fb2-589b-4c10-9655-a3f0688db1f9.json and https://artists.proofprofile.net/proofs/artist/a1893fb2-589b-4c10-9655-a3f0688db1f9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Club Brugge Fans Voetbal Liederen - Vol. 1
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 0x8c252ff344c6300ee48b8d620c0d5b63346b229ce4e98568b54275ddceed26f0. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:49:00Z), 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/GBSMU2340940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ce86d66a7c8c9ac704d600567138e87212b8cdfdc6713f43c188406c871d10. 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/GBSMU2340941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e33add0a7126f9be6b3e6a773ab592da1635939e81b5056674315238257f2b3. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T11:00:37Z), 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/GBSMU2340944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4579569064524b9fda9bcf1b621abea130ca7ca4e13cdd7bb4d4724eda4e3d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:39:16Z), 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/GBSMU2340951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84e0ccaeef4944048f93a21ba2a158955eca43945229e2201c23e4196397ff4. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:27:17Z), 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/GBSMU2340952.