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 0xf4b670ddd5140e6f8b80972c1ef2488616100dd9999407869dbe2a325f2700ba. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/259d8f5a-e756-4a03-abcb-d8aed7f889a2.json and https://artists.proofprofile.net/proofs/artist/259d8f5a-e756-4a03-abcb-d8aed7f889a2.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Hadaka No Yuusha (From "Ousama Ranking / Ranking Of Kings")
Bring Back ( from "Tate No Yuusha No Nariagari" ) [Cover]
Sansan days ( From "My dress up darling / Sono bisque doll" ) [Cover]
Giri Giri ( from "Kaguya Sama Love Is War" ) [Cover]
Akuma No Ko ( from "Shingeki No Kyojin / Attack on Titan" ) [Cover]
Mabataki ( from "Sasaki to Miyano" ) [Cover]
Cry Baby ( from "Tokyo Revengers" ) [Cover]
Ichizu (From "Jujutsu Kaisen 0") [Cover]
Akeboshi ( From "Demon Slayer / Kimetsu no Yaiba" ) [Cover]
Your Name ( from "Vanitas No Carte" ) [Cover]
Hadaka No Yuusha ( from "Ousama Ranking / Ranking of Kings" ) [Cover]
Gold ( from "Boruto: Naruto Next Generations" ) [Cover]
Chitty Chitty Bang Bang ( from "Paripi Koumei" ) [Cover]
Ao 100 Shoku (From "Komi San Can't Communicate" )
Honey Jet Coaster ( from "Shikimori's Not Just a Cute" ) [Cover]
My Nonfiction (from 'Kaguya Sama: Love Is War")
Himitsu Koi Gokoro (From "Rent a Girlfriend") [Cover]
Cinderella ( From "Komi San Cant Comunnicate" )
Dance in the Game ( From "Classroom of the Elite" )
No Man's Dawn (From "Overlord Iv") [Cover]
Hollow Hunger (from "Overlord Iv") [Cover]
Endless Embrace (from "Made in Abyss") [Cover]
Hana No Tou (from "Lycoris Recoil") [Cover]
Scar ("From Bleach Thousand Year Blood War") [Cover]
Chainsaw Blood (from "Chainsaw Man") [Cover]
Rendezvous (from "Chainsaw Man") [Cover]
Seishun Complex (From "Bocchi The Rock") [COVER]
The Blessing (From "Mobile Suit Gundam The Witch from Mercury" )
True Story (from "Bungou Stray Dogs") [Cover]
White Noise (from Tokyo Revengers) [Cover]
Escalate (from Nier Automata Ver1. 1A) [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 0xf66d527755d5742a4479184fd3766babc47d72053155d0246cb9e7ef3e6cb4dd. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32268479 — a six-check JSON result.
Again ( Fullmetal Alchemist: Brotherhood )
Guitar, Loneliness and Blue Planet ( Bocchi The rock! )
Zankyousanka ( Kimetsu No Yaiba: Demon Slayer )
Ao No Sumika ( Jujutsu Kaisen Season 2 )
Akari ( JUJUTSU KAISEN SEASON 2 ENDING )
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab633b1833942c2dc7f61be92be79666308ad2f547f833ddc768c7b86d752595. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32293954 — a six-check JSON result.
SpecialZ ( Jujutsu Kaisen S2 Shibuya Arc )
Happiness Of the dead ( ZOOM 100: Bucket List of the Dead )
Yuusha ( Frieren: Beyond Journey's End )
Itterashai (Attack on titan The Final Chapter)
Bling Bang Bang Born ( Mashle Magic and Muscles Opening 2 )
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b54ded14f0965eeaa226e8aa2044487742e439862d344cf9779ed897a7951dc. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US7VG2482779 — a six-check JSON result.
Hana ni natte ( The Apothecary Diaries )
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f31320ba0be7b2eb8189a5d2f40763be7b6e29be61a137aa29b7ff29008c569. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32332761 — a six-check JSON result.
Yuki No Oto ( Yubisaki to Renren Opening )
Ambivalent ( The apothecary diaries Opening 2 )
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b982e827c700a1e7ee3bf5896f98319a4464393782f87a6d007d521be0c092e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32338718 — a six-check JSON result.
Hana ni natte (The Apothecary Diaries Opening)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd68a07fcf3639ac59f1d3e116ecc49433c1476fb6ee901afd105f734d0a120e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32343752 — a six-check JSON result.
Like Flames (Tensei Shitara Slime Datta Ken Opening)
Tabi No Yukue ( Spice and Wolf 2024 Remake )
Mugen (Demon Slayer: Kimetsu no Yaiba S4 Opening)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9d8c4e60a6ce748dd2781b26d5ac35fa14e17412a8a25ffa56360417022710. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32383803 — a six-check JSON result.
Go-Getters ( Suicide Squad Isekai Ending )
Shikairo Days (My Dear Friend Nokotan OPENING)
REWEAVE (Re:Zero SEASON 3 OPENING THEME)
Kingsblood (The Beginning After The End)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40977b4f8fa96c4c875c9886af41f22e619c79440822f936f94bfa6850a577a6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMER2512707 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2025c73210745bd4a1e3b06771e7be92006ef69380af08d9f42808f633feba. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWS2532210 — a six-check JSON result.
Run Sakamoto Run (Sakamoto Days Opening Theme)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730e3935da843d39b426f27872bc4450da975955d903297977588c9c335e80a0. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFG2561778 — a six-check JSON result.
You Can't Run from Yourself (Kaiju No. 8)