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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af66422ec24aa04453e2334d2dbccc3f4519dfba51186c9ae044e5cb34dae24. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0d441ae-4434-41d0-8fda-9c734ccc8a65.json and https://artists.proofprofile.net/proofs/artist/b0d441ae-4434-41d0-8fda-9c734ccc8a65.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Twice Between 1 & 2 Piano (Piano Arrangement)
GI DLE I Love Piano Version (Piano Arrangement)
LE SSERAFIM ANTIFRAGILE Piano Version (Piano Arrangement)
Seulgi 28 Reasons Piano Version (Piano Arrangement)
Dreamcatcher Apocolypse Follow Us Piano Version (Piano Arrangement)
Bibi Lowlife Princess Noir Piano Version (Piano Arrangement)
Newjeans OMG Piano Version (Piano Arrangement)
Red Velvet The Reve Festival Piano Version (Piano Arrangement)
GI DLE I Love Piano Version Sped Up (Piano Sped Up)
GI DLE I Love Slowed + Reverb (slowed + reverb)
Hello Future Piano Version (Piano Arrangement)
Life Is Still Going On - Piano Arrangement
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fe8b5974a93fcad83c3eb3363aa04ca94ef0611097ece3d8cc092bc7e38c8d. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZFZ22389418.
Candy Winter Special Piano Version (Piano Arrangement)
Le Sserafim Fearless Piano Version (Piano Arrangement)
Beautiful Liar Monsta X (Piano Arrangement)
Glitch Mode Piano Version (Piano Arrangement)
Jinyoung Cotton Candy (Piano Arrangement)
You In My Blurred Memories (Piano Arrangement)
Running Through The Dawning Sky (Piano Arrangement)
Kizutsukedo Aisiteru (Piano Arrangement)