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 0xfbe3daf829a90151d9aac7384f908c91b66941065592add9a0e896dac1d10226. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/767128ec-c5fb-4567-ac13-73b76e057c19.json and https://artists.proofprofile.net/proofs/artist/767128ec-c5fb-4567-ac13-73b76e057c19.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
One Piece Sekai No Owari The Peak (Marimba)
The Apothecary Diaries (Kusuriya no Hitorigoto) Be A Flower (Hana ni Natte) [Marimba]
Frieren Beyond Journey's End Haru Sunny (Marimba)
Demon Slayer (Kimetsu no Yaiba) Kizuna no Kiseki [Marimba]
Hazbin Hotel (Hell's Greatest Dad) [Marimba]
Honkai Star Rail (White Night) [Marimba]
Magic and Muscles (Bling Bang Bang Born) [Marimba]
Sailor Moon (Moonlight Densetsu) [Marimba]
Driftveil City (Pokemon Toothless) [Marimba]
One Piece (Drums of Liberation x Overtaken) [Marimba]
Shangri-la Frontier (Broken Games) [Marimba]
Hell's Paradise Jigokuraku (Work) [Marimba]
Fullmetal Alchemist Brotherhood (Again) [Marimba]
Goblin Slayer II (Entertainment) [Marimba]
Zom 100 Bucket List of The Dead (Song of the Dead) [Marimba]
Attack on Titan OP (Guren no Yumiya) [Marimba]
Hazbin Hotel (Hell is Forever) [Marimba]
Sword Art Online (Crossing Field) [Marimba]
Dragon Ball Makafushigi Adventure (Marimba)
Dream Alarm Iphone Alarm Techno Remix (Marimba)
Solo Leveling Ending Theme Request (Marimba)
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 0x26b95f4b42a1da383430b6b171f9c273991848fc2bf430fe829e19776c74e793. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/AUXN22470217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50916a0a867e23085184919421f11b8aff2690572dfee9e3a489805e126d5aae. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/AUXN22470215.