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 0x5a5e128521484e8dc06140d4d040574699e214c94f8434a1c570c6bf0cbde301. 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/9c4eb353-f03e-4311-aabe-3638768891bf.json and https://artists.proofprofile.net/proofs/artist/9c4eb353-f03e-4311-aabe-3638768891bf.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 0xb6e35ab5746c529d3bf8feefd90e8062e8b631bc7b413b1d2cc6aceb5761225e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6Q2489796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3da5c05565493a6e203293554a661bbf3c7bd2a25c940608a87f47fa0a7a72. 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/QZHNB2588354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8917e4dbcaef8e288f7617ab14032380ee890e25253c25ffc14354423717ce. 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/QZHNB2588356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6eafa395bd105d1605d97ec5cd3023151ad7bdf72fb6ea3840817f41bd0c69. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:05:25Z), 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/QZHNB2588358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e384f3b8f6bbbb0c76bcbd86305639dbd48e44f818fc4801b4cbd1c1ee49a8. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZHNB2588353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19f5eaa50f80302dfcab2b2504a136d92ce8aa040841a700c8aec7d9cf6bdbf0. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:08:11Z), 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/QZHNB2588357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6eafa395bd105d1605d97ec5cd3023151ad7bdf72fb6ea3840817f41bd0c69. 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/QZHNB2588358.