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 0x1a1ce2da198418700908cb0df789886db238e3a129d7a573026c8ec37448a102. 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/a198b1a5-132b-4766-8b99-3b4a385ad7e0.json and https://artists.proofprofile.net/proofs/artist/a198b1a5-132b-4766-8b99-3b4a385ad7e0.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 0x0a178866ca762de383cf969451c005505132bf5b53c1ce7bef3c676b7c46e7e2. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZWFN2390066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa49b0e4755e71f9d0bd22d543b080d79698f6ee3f4447378b8454e4835a0cf. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZDA82426521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72c269e92a8c453e15d1458c8e8991d3598a7b101d3308795940455ab9783e1. 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/QZTB32525214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb715c87289906cb93f82610127406de721cbb051632873a53be881b9c53e0a. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZHNB2440046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3b4c8d3927b2ae02a45752835c43ff3ea680c8981625af18dfe8191d7f8c4c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:41:24Z), 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/QZWFF2470004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cdf8839236126b8f75ffc396ff0a19e5ca7cd5e19375c7e9e79d077b04c6d3. 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/QZWFF2470005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f39a8967b1d62a21495835a47cd277d255d59a4e88ebc87b0b9d8430b5e405. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:36:35Z), 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/QZWFF2470006.