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 0x942c36efc282375d615eb3b8745c28baae372ed291069cbdc35d3ffbe177b135. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b9e3764-28ec-41f0-9aff-cf9c6293be08.json and https://artists.proofprofile.net/proofs/artist/2b9e3764-28ec-41f0-9aff-cf9c6293be08.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 0xa15adafa0014dface16993e5cf1fb8f6e40dc1d3781a220b6aff2c38d7e731f8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6P41523604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f6a2170c082c29ce1a088d5f710d3d7e1495b15e678be6bc312ba7ce3345c5. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QM6P41523606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fe13b7ecb5034bfc21bd0e0aec21813de281c87010aa94a4ac7df16227fe10. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QM6P41523607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5684a0679e36c91ab5e3fcaf7eb24aefadc01128fbf1e0737ecce48ca80012. 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/QM6P41523609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ed396cb3ac28e817aad861a683c7a5b9773bd10c773af9a940af172eb8fff3. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QM6P41523611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cc88529218d895a0f5f23c5a3de6deea0afc4aeb3863cbc7bb95917423dbf9. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:18:23Z), 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/QM6P41523612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b0a7c9beb159f3fbb795746cd78abc2f22d7649fe43a6492bc808cbe2b79c7. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QM6P41523309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9326e871c404324e7f22b3508c3f4dc4d4d4043eb9518a6baaf0dc55543c72a. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:59:16Z), 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/QM6P41523519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8969e17d7f99e15df193a6aed8447f2b7548453cf4c9ba4e3d601d05123b1ef. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:18:33Z), 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/QM6P41523521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf82667ffc6a4a5e8cf0e4aca32243787bb9cb345da875e6dbd983d8bf08a690. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QM6P41523527.