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 0x2061c3fb2ce4bcfa9cfa0deee936b1138d1633b090e3c819caa5cd6edb020125. 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/14ec41a9-465e-41dd-866b-95d806ca0f23.json and https://artists.proofprofile.net/proofs/artist/14ec41a9-465e-41dd-866b-95d806ca0f23.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 0x5e2a49759765ec525ccf5899ea4a37c75658bd3201d99db0a55fc5254ee72599. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/KRMIM2132733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d3cf45de4e7ec1ae58dccf2273ca032d22868dcf24a48e436b7651472e7354. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/KRMIM2132739.
Mascagni : Cavalleria Rusticana - Intermezzo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeaec22f0d647a8e14ed88b41451553746be401fbb79b75760d76540983460e4. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:52:39Z), 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/KRMIM2132740.
Chopin : Etude No.3 In E Major Op.10-3 'Tristesse'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f31ef3dd6764eb43f65bbb8b127d6d974843dd1502c61c892147d527bdd25cb. 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/KRMIM2132743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44898ca94f44d4b1324e7065106e29ba4769a3ee775e8194188545d8b70bd7c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/KRMIM2132746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6561d7255dbca50914a7e23d930d4d5fac0276cb3366537a6b441a5a11a052fb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/KRMIM2132754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca922b17e7149284d460695250f18dc97648f03842c1a25c5d1b099f03b6968. 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/KRMIM2132760.