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 0xf55a196c7da4ea60b026b7940e71931723dbdb571aca2361c420b2eaa5fa7431. 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/641cb2d9-5576-40d1-85e0-06026620ad8f.json and https://artists.proofprofile.net/proofs/artist/641cb2d9-5576-40d1-85e0-06026620ad8f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Akeboshi (From "Demon Slayer: Kimetsu no Yaiba - Mugen Train Arc") [Cover Version]
Nanka Shiawase (From "Flame of Recca") [Cover Version]
Nanka Shiawase (From "Flame of Recca") - Cover 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 0xd73cbf7cdd1773eaac0ad35e71235266ebfba0603d6fcc85e6648379ceebba6f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32193700 — a six-check JSON result.
Moonlight Densetsu (From "Sailor Moon") [Cover Version]
Orange (From "Your Lie in April") [Cover Version]
Orange (From "Your Lie in April") - Cover Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a741cb3f690bd258c9d51f99dede2d75a610faf36e78bf87e7856aafc437045. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32195164 — a six-check JSON result.
Ohayou (From "Hunter × Hunter") [Cover Version]
Ohayou (From "Hunter × Hunter") - Cover Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1413599da75850816ce4071745238fca093a143cb0c07059ea42def0726a105f. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZPJ32195163 — a six-check JSON result.
Kimi ga Suki da to Sakebitai (From "Slam Dunk") [Cover Version]
Fields of Hope (From "Gundam Seed Destiny")
Crossing Field (From "Sword Art Online")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57d8e7bf9eb44e28776365ebb99eccaf78146955283e55bb341e12c2834d38b. Chain 2 (Bitcoin): anchored in block 957703 (2026-07-12T12:26:40Z), 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/QZPJ32199909 — a six-check JSON result.
"Hannari Nagare" Ikaw Ang Iibigin Ko (Japanese Version)
Yuzurenai Negai (From "Magic Knight Rayearth")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f384e738b8eda21426c35ec539516b2ff5e1fdd17c25fdeb79b03a9e1828aa. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZPJ32251218 — a six-check JSON result.
Cha-La Head Cha-La (From "Dragon Ball Z")
Sailor Star Song (From " Sailor Moon Sailor Stars ")
Kaze mo Sora mo Kitto (From " Sailor Moon Sailor Stars ")
Catch You Catch Me ( From "Cardcaptor Sakura")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30130c39498665841f81445807ab89720a47809b4e7829ca19f98b993e0b55be. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZPJ32295956 — a six-check JSON result.
White Reflection (From "Gundam Wing Endless Waltz")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332242f8fe013920d0b58b3360eb9927a1ac78a909e65e7ba236eb47350769b7. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/QZPJ32298784 — a six-check JSON result.
1000 no Kotoba (From "Final Fantasy X-2")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776617d54312131121d760ae6594c1a101e55e48cdb8793fc44d9bd6cdf5ce1d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32289975 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda3581aae6d3e7be7ca5274e488b81b8496e8368b89c932ae989c7b7e062b25. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZPJ32306763 — a six-check JSON result.
Anata Dake Mitsumeteru (From "Slam Dunk")
Hohoemi no Bakudan (From "YuYu Hakusho")
Watashitachi ni Naritakute (From "Sailor Moon SuperS")
Sore Ga, Ai Deshou (From "Full Metal Panic? Fumoffu")
Itooshii Hito No Tame Ni (From "Fushigi Yuugi")
Yakusoku wa Iranai (From "Vision of Escaflowne")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb332c6a16afd98d4ed1adf3c58416f41f3bfe9097cc30bec8f87b0a3eac16458. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32402893 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0883a69b1de26e3b66ac85d7d758fd725d363998b53fa823a93c747289a2ec16. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32421670 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6502495d10710840135bdcb22f9affe76412b8da4ca01c7bcc315856b2c7904. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZPJ32445429 — a six-check JSON result.
Namida wa Shitteiru (From "Rurouni Kenshin")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2f573d74b797490a92c974d8d03c5b4c696a5a89c85ac1c48895d0a3444b52. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32460280 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b42a344fc1d3713e7521b1e43a9233f5161e8fb7530089ca5e333b270e895eb. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZPJ32510381 — a six-check JSON result.