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 0x06f722f83d6bf34e7432f0d06ea8891fc75f64ca28e5cf3abf26088457b1700c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6d10e10-0c4f-4cd6-bd58-e67be192ad07.json and https://artists.proofprofile.net/proofs/artist/a6d10e10-0c4f-4cd6-bd58-e67be192ad07.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 0xca3ee204fca17ffcb63e24a3e983c8027deb5db56b63d5ef820d5f24f6d9f410. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:32:53Z), 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/CZK801400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6c46bc9cfc0e2d3eeff68fab9d1a1de903fa1297817164199f1ea6e5b0e9ed. 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/CZK801400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904744db95eeb8f33cde997620998f70edd3b623cc42754ee3febc5cd17f78fb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CZK801400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32970ca955ef51862ccc5f7d510ced161e1cc8fd368b6596e92a5a426c67d2ca. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CZK801400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be80d2cad1b45a0af67bb62101e0d7c328353b8e81ecbd7ccc540f4cc2ec538. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:52:33Z), 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/CZK801400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2111a6e31c8179cac017745818ea097379e0c0c47ffe5704380bf27d8304c5de. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CZK801400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8dd783e68e2e9e5e3b0bb35bacc34e24b68804e1cfb6d3d3e66447b04ff309. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CZK801400022.