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 0x9e4f8aeda6ededbde0251edcb151a5017d73db2264b807a5904dac3a77bd8a6c. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/330abe9a-d412-432e-8253-f150706e381d.json and https://artists.proofprofile.net/proofs/artist/330abe9a-d412-432e-8253-f150706e381d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Best Classical Music for Cats: Bach, Beethoven, Mozart, Calm Down Your Animal when You Are Out, Piano Music
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 0x6710d7cd18c3801af42cff2715191ade572541699e5dd2cb309ca6471e71d8bf. 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/US5UL1425079.
The Best Classical Music for Dogs: Bach, Beethoven, Mozart, Chopin, Calm Down Your Animal when You Are Out, Piano Music
Classical Lullabies for Babies: Bach, Beethoven, Mozart, Musix Box, Best Baby Sleep, Good Night, Einstein Lullaby
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6710d7cd18c3801af42cff2715191ade572541699e5dd2cb309ca6471e71d8bf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US5UL1425079.
Beautiful Moments with Classical Piano Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957d01140ef9f8ed4136b4bb1e1f12e3f779e7f1360f7521c856896fc23c33ab. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US5UL1425080.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Chopin, Concerto 1, First Movement Theme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6118339ed947d1bbd57f833084d738481fd1add3c34137a272c80218564ff0f7. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US5UL1503984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa684906cb0b7fdccf248db3903b1e1bf3721a3101b6a75e6d4306f7dfbfd57. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/US5UL1421388.