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 0x59920f28c8aea0a4be1ab26d7bfef905d7c575d9766fa8d2db8e40ae8cd2bdb9. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/71381d1e-7e1e-4bdd-8604-7e5d6d9422eb.json and https://artists.proofprofile.net/proofs/artist/71381d1e-7e1e-4bdd-8604-7e5d6d9422eb.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 0xc1b0abdf12ff23dfd2658d76f35cbced34c9a00e71372bb8dc6cd805138e9a2d. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:18:11Z), 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/QZES82223004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2844cbb05bb5de52997e2c988bc4a65849b8b333df2248ad84a49df49a86fc94. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTAS2280627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002322983158610addc8b47dcfc16e18ef1ddf7f5d4e002d688ca7a650ed3b10. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZTAS2280629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc59e881ee9751b171148c927333700421fc5cd9e5ceb2daa71c9da92e6aa690. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTAS2280630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa696624fed9fc4b1fd39f9613bc80725d85c108de130769dff71dabfb9af4277. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:44:30Z), 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/QZTAS2280631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x800d205deb0bcff11e610e1ea2cf2a1de213c02cece124efd72f10284bec9f3f. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZTAS2280632.