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 0xb97f47f656e240f22f18856d42fd25f5f76b70f848a35856db1e1ea818d1ff64. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5d37723-bc23-4bcc-b0b2-50fbbd6a12e4.json and https://artists.proofprofile.net/proofs/artist/c5d37723-bc23-4bcc-b0b2-50fbbd6a12e4.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 0xf569fe066998c6648fe072ff0667f7c655961660fb16fa10210482dffba30fb1. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZHN42193636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf569fe066998c6648fe072ff0667f7c655961660fb16fa10210482dffba30fb1. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:46:42Z), 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/QZHN42193636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e428aa0ef4bddc9ab80f26caab0a8a1432f18ab10cce4855302fc7f0c073610. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TRA162300582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x985903b17717ada172ffa40557b7a675dd30c7bcaa29d31fa48b05deec8d314e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TRA162300583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9852b962902fb9c2b26c34928e5bfc1714db136c1673def94cc3da666e760705. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR10S2434586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff61e98571f8bd8600c0f6315c36a08fb855a39c9678cf4295deae424c14529a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:23:39Z), 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/FR96X2414213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a6fe043f02841ae0b6e03492b79acfd777d102e306a1b12fd36991a8d6f1bec. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX762493821.