1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x7924f452007ee66a0dfeacab219504431dc493beafd80b43a91c706b33239b90. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3323cdc9-7d3d-4bef-b349-ea0562ceca61.json and https://artists.proofprofile.net/proofs/artist/3323cdc9-7d3d-4bef-b349-ea0562ceca61.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 → block OTSBitcoinBlock must exist at that height 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 0xf99ae0bd16e1e4365a3bc915ef0e1acd2f46679a711247778dc7f755e1dec491. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCJPC1538597.
Time after time hana mau machide (Piano)
Piano Best Selection Vol.1 Pianodekiku LOVE SONG Josei Vocalist
Unchanging Love Kimigaireba (Piano Cover)
Piano Best Selection Vol.2 Pianodekiku LOVE SONG DANSEI Vocalist
KIMIO SAGASHITETA THE WEDDING SONG (Piano Cover)
Piano Best Selection Vol.4 Tsukaretatokini Iyasareru Meikyokushu
Piano Best Selection Vol.3 Utahimetachino Meikyokushu
Time After Time hanamau machide (Piano Cover)
Piano Best Selection Vol.5 Iroasenai Nandodemokikitaimeikyokushu
BOKUGAICHIBANHOSIKATTAMONO (Piano Cover)
Piano Best Selection PIanodeKiku KIMETSU NO YAIBA
Korean drama series played on the piano "Crash Landing on You"