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 0x56d98d795a0a6883039f4e534ebd51d770d028184b47eb9f038a22e9d48033d3. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/803fc474-b27b-4623-836d-fb6869598fda.json and https://artists.proofprofile.net/proofs/artist/803fc474-b27b-4623-836d-fb6869598fda.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 0xd5b441256c57eca491fb4a910a91f4ea0293bba78846ddda4d82e9ded704f961. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:02:57Z), 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/INA130701186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1505ffd2dbf868975cc60e224b62d587a314138db34e3eb79b48b80a64bb0e5. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/INA130701187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6429796de3d86384c3bca9feaa86f07602877e7e190de43858652b67d5eacd6d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/INA130701188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7dc7bfd9f99c5bafd168023914262978a028345dc31811b8ba387fdb456e4fd. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/INA130701189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee08545d28e774d27fe2f8288c2ecef3a81cd16f7f709b2c8db6e5c6bbd41d3d. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:13:33Z), 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/INA130701190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb30661a9e312095c858b2bdc0acc1a214728617a8a0aeb635237b8f3d3c9ad5. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:00:58Z), 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/INA130701191.