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 0x4e3bd1a8fb4164b94a61490703c3de7fdad20da93a62d61df88fd6505dad9faa. 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/f86ef6f2-3df3-4b3f-a3ca-4c846981f6e9.json and https://artists.proofprofile.net/proofs/artist/f86ef6f2-3df3-4b3f-a3ca-4c846981f6e9.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 0x063ac1c703db676c563849dda22eab7a8679c778c3046f40c360df04dc0afb0a. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:03:30Z), 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/GBMA22322198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b44aadd4fb59f997b4599aa147a25d2918c6761ef888be3d0d37b6dbd36b75. 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/GBMA22328774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb08811f6c5a9f69f9170d68cbc884fa470bab520129cbcd4394ab6235354430. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T03:23:43Z), 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/GBMA22328778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441a13054022df251df5ac49aefc790f41ff410e09d76ede5458273893dc9a5b. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:42:03Z), 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/GBMA22330817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0c0d0189988a4b9d582a06fe83226a70102ff0a0d5ff2536e5e136b58d2739. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GBMA22330820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8faf75182f6fa531d3144a5fefb82a0b98fef7781bda31ce07478938a638fac2. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/GBLFP2413987.