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 0x08c568feaef0e5c10a554df98dc2fb24bafe3956f608da51a7c0eaf2f80127d3. 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/41486540-51de-4bbe-a01c-4ef07e104c86.json and https://artists.proofprofile.net/proofs/artist/41486540-51de-4bbe-a01c-4ef07e104c86.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 0x99bf9cd3457f6d1c304ea3ed3249b7ff78095becb4f5ed20e79e8777e778f75f. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/BRTVK1600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2b0d162c828f880b8e2dbe5110ee0be594e1c3600a2bf2fca41d050d5b9867. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:31:50Z), 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/BRTVK2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c95f7c513c820a02ef30bcbfdd73f98b022c3744d0059f72e14eab362474f3f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BRTVK2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf401004ad9cf762be84e8ba341cda6d1991616f0890217566bc3d0f39341da. 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/BCVKK2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f477b34bc3df6523669c2bc19398c6b57f5560f46bef1874828473ee3d323df. 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/BCVKK2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6dde2a1c3377718b736a600d51ab7b33b185f419e6d7dc5f274b993ece1353. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BCVKK2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8577fd2279d0d38a2a63c4232094ea2d591d989a9ad5f39d9405c498b74f0a7a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BCVKK2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb4655201f36ae7aceda6ce8bf3661acf88e556b0b0187415f28b466834adee. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCVKK2200001.