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 0xc5e9b8d432188fb9bb338759d0aea4130db4122cdbd6e414953e34127e494d76. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a59cee93-30b0-4c9f-b303-4ab76b40539a.json and https://artists.proofprofile.net/proofs/artist/a59cee93-30b0-4c9f-b303-4ab76b40539a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Guren No Yumiya (From "Attack on Titan") [Cover]
Littleroot Town (From "Pokémon Ruby & Sapphire / ORAS") [Lofi Guitar Chill Calm Version Cover]
Littleroot Town (From "Pokémon Ruby & Sapphire / ORAS") - Lofi Guitar Chill Calm Version Cover
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 0x4f72291cafa63ec44d338587f56573cbd32b3f80949e424906fb749bb1c1739c. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/QZPJ32101356.
Isabella's Lullaby (Rainy Lofi Music Box Lullaby Cover)
Baka Mitai (From "Yakuza 0") [Rainy Lofi Music Box Cover]
Beneath The Mask (From "Persona 5") [Rainy Lofi Version Cover]
Spooky Scary Skeletons (Rainy Jazzy Halloween Lofi Guitar Cover)
Big Shot (From "DELTARUNE Chapter 2") [Lofi Guitar Cover]
Big Shot (From "DELTARUNE Chapter 2") - Lofi Guitar Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f14328a7db711a025e5f9cee46673856ab239c4ddb1c18ff2e8e23171d6587. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZPJ32114649.
Lost Girl (From "Deltarune Chapter 2") [Lofi Cover]
Gurenge (From "Demon Slayer") [Electronic Rock Metal Cover Version]
Pokemon League (Day) [From "Pokémon Brilliant Diamond / Shining Pearl"] [Rainy Lofi Music Box Lullaby Cover]
Pokemon League (Day) [From "Pokémon Brilliant Diamond / Shining Pearl"] - Rainy Lofi Music Box Lullaby Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec87face4d8dc295ef0bc176bfef158329e7774b2af5359ffae7447b585c5251. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZPJ32126157.
Silhouette (From "Naruto Shippuden") [Lofi Guitar Music Box Cover]
Last Christmas (Chill Lofi Music Box Guitar Cover)
Akeboshi (From "Demon Slayer: Kimetsu no Yaiba Mugen Train Arc") [Lofi Guitar Cover]
The Rumbling (From: "Attack on Titan") [Lofi Guitar Cover]
Tifa's Theme (From "Final Fantasy VII") [Lofi Guitar Cover]
Verdanturf Town (From "Pokemon Ruby / Sapphire / Emerald") [Rainy Lofi Music Box Lullaby Cover]
Verdanturf Town (From "Pokemon Ruby / Sapphire / Emerald") - Rainy Lofi Music Box Lullaby Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa491d7bce1584c88b6c81bdad4e9c16169330ec7c3493fd6eff0d2e26c253496. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZPJ32144118.
Attack of The Killer Queen (From "Deltarune Chapter 2") [Lofi Guitar Cover]
Running in the 90's (From "Initial D") [Lofi Guitar Cover]