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 0x9c64f37ab9c272dfa7cfe3a431021ab585c8192d6c954207d071c24bd73c6ae7. 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/50e11e75-d4e4-4766-9470-96b06844b633.json and https://artists.proofprofile.net/proofs/artist/50e11e75-d4e4-4766-9470-96b06844b633.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 0xc203fc5002b7b0fd598237f67ea1ec0795a16195e013095e1c01585779d373eb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GB4AA1100160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7f4b2522fb6bffdefe2d6b6799f7afdf5bafbdf86e43d54b69c72572078daf. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/UK69B1400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc02547e34635999076b6ee60df6f4293fefc69a67dbccb83bc25486ae9c208. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/UK69B1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeac2cfa33423e90ad4be6db6dfdd03b5adde414d9fe75efa1a74f9ea700a53b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:32:03Z), 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/UK69B1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bc61be47db1d2cd91e411c6a1d1f6775bfb4cacdf23289a5c17c91cb6a9fea7. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/UK69B1400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2f655d7c1d52307836aaa6d5ef88c48fc4420012f4304a826ea4a8405a30dc. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/UKCUZ1500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31fd1185e86c5dc261fbdebf2df11e2b6b186761ff37e664ea885a8c5c216ac6. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/UKCUZ2500003.
Pearl Fishers Duet (Au Fond Du Temple Saint)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeef04fffbbf0384a830e5a31266bbf32c3d74f38cf8b5394c6dba029119e6e2. 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/UKCUZ2500023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67be1d28b5585619bea6a2d166ea7f5caf7eb4158f7c48d3fa867a2f2702b897. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UKCUZ2500028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ce509220dae13651c496f727c4699b2b3eba071fd9836d0b81e8373aa15a96. 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/UKCUZ2500001.