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 0x4c1535259d481e30ed2e837895cff8839d3c5a756269d4f667d4685db127f8e6. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3176c14-e70a-4869-be1f-26579a86445b.json and https://artists.proofprofile.net/proofs/artist/e3176c14-e70a-4869-be1f-26579a86445b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Lost Souls & Free Spirits: The Rebel Collection Old & New
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 0x4dff31854929d637bc33d102aa151df5574d2b14d7ec31594b2802d757de8855. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:56:04Z), 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/USETB1700086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b5c64488afef015da44b9d7693036f2523053276b8f8229a822bff1f388aa2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:21:45Z), 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/USETB1800111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63570552ea9966bd209cc89879e6b6a9a904addb69f0401c2c9d204ae0433b51. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USETB2100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5050c06f52238e5953fb252fa1714b36414019844a14b055df4fb324e02ff6da. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USETB2200152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9deed5e53e089bef43dad03fb2fe39233835bd317d37a3865eb2f7ac03808c71. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USETB2200162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6961f5ad5a13b43507b912486a55bafe7508fa1acb1d8e9316d5aed706c196a3. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USETB2200158.