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 0xac459a15b0a6cff1372fd1bd9b3fabe7bb2b8fb5508bf271dae12691f4d67fff. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b9bd5de-e74a-4b90-b1e4-8f54f7e10478.json and https://artists.proofprofile.net/proofs/artist/9b9bd5de-e74a-4b90-b1e4-8f54f7e10478.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 0x82a93fdfca146a63568da11932581ac34f9adda4f97add9d0490a8f1d5f9ea91. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/AUGCB2000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73dedd7dfcb0228190c78388e9d9569740d10e97a1df50b030105d313a24ba1a. 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/AUGCB2000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ba5a390ef9c52e7237bb7303142ca25f25c63c67e9472d34a7261b1a93350e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/AUGCB2400037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe928d880da651dc65c80580e8d142c758b98971348a3b154f9cfbf69f58a9200. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUGCB2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x490618dd1a4f10c08fbc2a00cc41647af310a331fefdfff41afc90a478ba8948. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:54:30Z), 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/AUGCB2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2262e06b306eb0d5406c19171eccd6decf17c7c8f46d8cb89276b302afff03. 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/AUGCB2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124b5b5b0f9f40e602a0f5318ef1b28e053dcc86365dc4e5a68520db058cb864. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AUGCB2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed366003a9e041399763235c12eb1ae2832efb6dec956bcab6f2afff0f9925d4. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/AUGCB2400042.