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 0x1bb3bb15b8b7c409b85000563c0da15d6d44e931694436686bcf9383305fc546. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73bfd32e-a4dd-44a0-8444-76b33ce4f281.json and https://artists.proofprofile.net/proofs/artist/73bfd32e-a4dd-44a0-8444-76b33ce4f281.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 0xb12d839cf3f2e4c35c29a48f6598f4bac40370b52e1f9a8395504a0ffae35183. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BKGQ22400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbec6f12df040cab126609a2e551ca2434e3149a438b10b5239db225a20b415. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BKGQ22400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79f8de44b7747404fc6c9d2990d9a437cdcd337c9780e7f65b23e2307130ce93. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:41:07Z), 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/BKGQ22500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8972982703aa96a0ff64bbe72e185a3c17f3347166ef6e28319f625de2200aed. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:53:57Z), 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/BKGQ22500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6b0893dc80549b097554071ce217f88db2a8b9edc6461bee20823f67f30faa4. 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/BKGQ22500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756387c66dd1b1d17aa024163db53cd64c28ab13c7be69fcaed23a8e512a0ed1. 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/BKGQ22500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea75489b11924b1303aeb736b02066eba981bbba0d9d2a130687adbc176fe666. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BKGQ22500010.