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 0xa7c16a98f5027a08996f20785555badf0dacfefdd0dc8fdefa26475d7bbe1cfb. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d387de38-419f-43e8-bfb3-64986353f075.json and https://artists.proofprofile.net/proofs/artist/d387de38-419f-43e8-bfb3-64986353f075.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 0xe979487d7a102d520986e19286789491a97fa5d544ffa5d28fb3b8ff7defc5fd. 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/QZ5FN1938615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea8050d0af406ff51e6c60ff8d079aba66387019d0d287cc0f612f050fee0054. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZ5FN1938661.
Chopin Mazurka Op.7 No.4 in A Flat Major
Chopin: Prelude in F Minor op. 28 no. 18
J.S. Bach: Invention No. 13 in A Minor, BWV 784
Fugue in C Major BWV 846, Das Wohltemperierte Klavier
Bach: Invention in B Flat Major, BWV 785
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe427527fd33ff6301e3163ae11f78b1e6a9c774d778e57e83012f4264be99159. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:10:34Z), 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/QZ5FN2016406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf32eb7d836081612dd4acc6703276cbb32d46c4d8c7bfa4064cc5c86846464a8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZ5FN2016417.
Quiet Harmony: Soft Music for Peaceful Thoughts