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 0xf8f1c1f687bc04c18250ddce2a8beb4eacb0acd50a7fc4c64f0b3c55295bc868. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32cb0b3e-f56c-44c9-a316-29c3370cc087.json and https://artists.proofprofile.net/proofs/artist/32cb0b3e-f56c-44c9-a316-29c3370cc087.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Can't Remember Never Loving You (Single Version)
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 0x5fa3028db336da811daa1ead55b4f9a5c2207a8bd654e4122819e31a834af17d. 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/CA27S1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bae2a1b22268e179866c4775344cf3704c9b84ad2ae15adb79b095985620de. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:29:18Z), 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/CA27S2101003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5d003f7dc47d5e7a7a5a263e128007f09e63071c16756a1713ac3ed9f3b058. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAY302300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2891dd5f86d92b7ab9d619a3fdb7053f25c8a7c4496812bc512376318a7acc3d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAY302300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5d003f7dc47d5e7a7a5a263e128007f09e63071c16756a1713ac3ed9f3b058. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/CAY302300003.