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 0xf68efe96e250d433aa88d0dade0dd248daf28eed7aecf4158c57454b0a68c7d6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1076e12-feb8-47e2-95f0-1ad2e9abef35.json and https://artists.proofprofile.net/proofs/artist/f1076e12-feb8-47e2-95f0-1ad2e9abef35.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Centimeter (From "Kanojo Okarishimasu / Rent a Girlfriend") [Cover Version]
Kimi no Sei (From "Seishun Buta Yarou wa Bunny Girl Senpai no Yume wo Minai") [Cover Version]
First Drop (From "Kanojo Okarishimasu / Rent a Girlfriend") [Cover Version]
Colorful Canvas (From "Ijiranaide, Nagatoro-san") [Cover Version]
Fukashigi no Carte (From Seishun Buta Yarou wa Bunny Girl Senpai no Yume wo Minai) [Cover Version]
Koi no uta (From "Tonikaku Kawaii") [Cover Version]
Easy Love (From "Ijiranaide, Nagatoro-san") [Cover Version]
Cinderella (From "Komi Can't Communicate") [Cover Version]
Honey Jet Coaster (From "Shikimori's Not Just a Cutie") [Spanish Version]
Honey Jet Coaster (From "Shikimori's Not Just a Cutie") - Spanish Version
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 0x3272d3be007838ac794bdf2c90eca9df385ca5a48b9ae1bb0d1fbaab7c0f10bb. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZPJ32182543.
Kigeki (From "Spy x Family") [Spanish Version]
Kigeki (From "Spy x Family") - Spanish Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60089725c05f44d2b8af37a7625e6db4a6d29caf84c6d8d2924aeecf7d39be48. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:06:51Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32182546.
Sansan Days (From "My Dress-Up Darling / Sono Bisque Doll") [Spanish Version]
Koko de Iki wo Shite (From "Tokyo Revengers") [Spanish Cover]
Bring Back (From "Tate no Yuusha Nariagari / The Rising of the Shield Hero") [Spanish Cover]
Zankyou Sanka (From "Kimetsu no Yaiba / Demon Slayer") [Spanish Cover]
Sentimental Crisis (From "Kaguya-Sama Love Is War") [Cover Version]
Dark Seeks Light (From "Sekai Saikou no Ansatsusha / The World's Finest Assassin") [Spanish Cover]
Aoi 100 Shoku (From "Komi Can't Communicate / Komi-san wa Komyushou Desu") [Cover Version]
Gotoubun no Kimochi (From "Gotoubun no Hanayome / The Quintessential Quintuplets") [Spanish Version]
Maid With Dragons (From "Kobayashi-san Chi no Maid Dragon") [Spanish Version]
Maid With Dragons (From "Kobayashi-san Chi no Maid Dragon") - Spanish Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f66d06ab186502df70a67df039b8bed536ed12f2537e21acfb5aafad0aff10. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZPJ32190844.
Kokuhaku Bungee Jump (From "Kanojo Okarishimasu / Rent a Girfriend") [Full Version]
OveR (From "Date a Live IV") [Spanish Version]
Shikisai (From "Spy x Family") [TV Size Spanish Version]
Shikisai (From "Spy x Family") - TV Size Spanish Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf8e634b28e481f30d060ff8e7db3aaeddca83452a038e787a80714779c9a98. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZPJ32209802.
Himitsu Koi Kogoro (From "Kanojo Okarishimasu / Rent a Girfriend") [Spanish Version]
Sign (From "Gotoubun no Hanayome / The Quintessential Quintuplets") [Spanish Version]
Hana no Tou (From "Lycoris Recoil") [Spanish Version]
Hana no Tou (From "Lycoris Recoil") - Spanish Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51a500910aaa37dacb119b674793ef382c4b6a19147402ea0fd3b07fe2695b0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32209806.
Hatsukoi (From "Gotoubun no Hanayome / The Quintessential Quintuplets") [Spanish Cover]
Shikisai (From "Spy x Family") [Full Size Spanish Version]
AIUE (From "Urusei Yatsura 2022") [Full Size Spanish Version]
AIUE (From "Urusei Yatsura 2022") - Full Size Spanish Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde93cde0c158ec9489eeefa0d71dc85595bd370c2bff6ccc4074c2f40db7ce6a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZPJ32236151.
IDOL (From "Oshi no Ko") [Full Size Spanish Version]
Dance in the Game (From "Classroom of the Elite") [Tv Size Spanish Version]
Spiral (From "Mushoku Tensei") [Cover Español]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728f7bcce85d372ac9b63b045b6bb10aa77189941bc8fdca84e59b9abc696d6a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:45:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32333629.
Chu, Tayousei (From "Chainsaw Man") [Cover Español]
Arigatou no Hana (From "Gotoubun no Hanayome / The Quintessential Quintuplets") [Cover Full Español]
Mephisto (From "Oshi no Ko") [Full Size Spanish Version]
Yuusha (From "Sousou no Frieren") [Cover Español]
Yuusha (From "Sousou no Frieren") - Cover Español
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d094b83f8dd67730648e00cd91e248a161d9a2311aa59ae25d55454f7b45f45. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/QZPJ32333333.
Hanna ni Natte (From "Kusuriya no Hitorigoto") [Cover Español]
Hanna ni Natte (From "Kusuriya no Hitorigoto") - Cover Español
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5863880abbd86801e34707e55031ed16da6a58c98775e0260573c3b8bcd8fce9. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZPJ32333628.
I Wanna Muchuu (From "Urusei Yatsura 2022") [Full Size Spanish Version]
I Wanna Muchuu (From "Urusei Yatsura 2022") - Full Size Spanish Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09fe05384809a40c854f6c4e83ddd9597b5b32d52fc3f15c310d8d9094d543c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:41:53Z), 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/QZPJ32333630.
Boku Wa... (From "Boku no Kokoro no Yabai Yatsu") [Cover Español]
Bloom (From "Scott Pilgrim Takes Off") [Cover En Español]
Bloom (From "Scott Pilgrim Takes Off") - Cover En Español
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0591da3d7b0a8fffb2d60010dee3bfcffa25e0d967928ca6d470d2078045239c. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32352155.
Fukashigi no Carte (From "Seishun Buta Yarou wa Bunny Girl Senpai no Yume wo Minai") [Cover Español]
Time Left (From "Chainsaw Man") [Tv Size Spanish Version]
Bling-Bang-Bang-Born (From "Mashle") [Spanish Cover]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f65f6e1a053716106ba72860157991e9b31af03cb9daa5e1702f374fd86bdc9. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZPJ32370616.
Shikanoko Nokonoko Koshitantan (Shikairo Days) [Cover Español]
Shikanoko Nokonoko Koshitantan (Shikairo Days) - Cover Español
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb43604a971f5032bd60860c17431853610e47b2f9294a8cdc622fbd758d586a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZPJ32390846.
Tiny Light (From "Jibaku Shounen Hanako Kun") [Spanish Cover]
TAIDADA (From "DanDaDan") [Cover Español Latino]
Hana ni Natte (From "Kusuriya no Hitorigoto") [Cover Español Latino]
OTONOKE (From "DanDaDan") [Cover Español Latino]
Pop in 2 (From "Oshi no Ko") [Full Size Spanish Cover]
Pop in 2 (From "Oshi no Ko") - Full Size Spanish Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56e50b1c27d19555be49d0ef0c5cb97f4657860472db3afac6fa9763ec8bca9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZPJ32470478.
Kigeki (From "Spy x Family") [Spanish Cover]
On The Way (From "DanDaDan") [Spanish Cover]