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 0xd93caff645d4f51c7fabbb80d1f965990d2d18ca4fd362aef504516b85429eb1. Chain 2 (Bitcoin): anchored in block 954174 (2026-06-18T03:01:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ee38966-947a-4a3a-83da-f16f820c10dc.json and https://artists.proofprofile.net/proofs/artist/7ee38966-947a-4a3a-83da-f16f820c10dc.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 0x011e407cc3a240af5041c156558a747764348fe10a2be44fcb2f018738049ed7. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/UKZGC2401558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9029598c479063dd2a8247015ccd4031e92979bb86f6e2d4d504ea0651838f4e. 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/UKZGC2400770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83d386b2a6ef7c73ea2a9ab0b7c96284ad418917c464299b104a3a6a1d0cec3. 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/UKZGC2401559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e8a83ea90cf5add28c87104e4216b63d03683acb4e1466e6222d6fccdfee56. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T03:02:02Z), 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/UKZGC2307293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e73740c701e6fef3bf4c371e636233771a11fa1eb0b7128d4211ba8c0e4cb61. 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/UKZGC2309524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60933d3fc5137a63ba186d3ae594d5d954f30739733b50a79429ff99cd020194. 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/UKZGC2401563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30df1ed72b6ff1907e26b4d56b597e46bcd2a64ccd423311792abea59a758de8. Chain 2 (Bitcoin): anchored in block 958573 (2026-07-18T15:49:54Z), 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/UKZGC2401564.