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 0xa4cbf7e58e06db36cf209096369029bc21b3ccd2d61fee5ad3096995c3c1c9b0. 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/90dc9c06-255c-4ad3-90c4-88fced4bb82f.json and https://artists.proofprofile.net/proofs/artist/90dc9c06-255c-4ad3-90c4-88fced4bb82f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Again (From "Your Lie in April") [Lofi 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 0x5612861bf9bfed2f7a1fecc2e55cea4785e445d2ef2ffaecb14dc881a3cd0822. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32100128 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9531f5b1a50d67fde8dc5c802580e89f67f6d86aa2286a0e8c893240e14c8d18. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS642181506 — a six-check JSON result.
Kaikai Kitan (From "Jujutsu Kaisen") [Lofi Version]
Kaikai Kitan (From "Jujutsu Kaisen") - Lofi Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2186788f42fb991617a1b14e6e8113d08965a6294959ad16bfb3373a4bb09afd. 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/QZPJ32232536 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94447a054d24b3ef7434dccec28e5970f1c6f096ed468b3f4e8530f18874ec20. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6XW2310229 — a six-check JSON result.
A Town with an Ocean View (From "Kiki's Delivery Service") - Lofi Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c09333ee920ecd7d329b7e144d3dce8837aa110fc08debfe15e934c11715f5. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32298561 — a six-check JSON result.
Always with Me (From "Spirited Away") - Lofi Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dca55f162cc2453f34a00f219e7eea10ec57e68711568778a559ae6a99e733. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZPJ32298559 — a six-check JSON result.
Kigeki (From "Spy x Family") - Lofi Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaca17cf7ec94795ac4b2117dbf493efd5cfc14ab128991c302b233c9bd19a1e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZPJ32302991 — a six-check JSON result.
Koi no Yukue (From "My Dress-Up Darling") - Lofi Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09a6b43fe952530fb93c937cee582e9c3f4565d97813a26a554b346a8fc89d6d. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZPJ32302988 — a six-check JSON result.
Waltz of Chihiro (Spirited Away) - Lofi Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea2eea2eefcb55804cfa02b2be977e797eeaddaf133667646c6b3b4f004eeca. 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/QZPJ32319582 — a six-check JSON result.
Heartbroken Kiki (Kiki's Delivery Service) - Lofi Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc058b326016f0ce8bf52987fcc4b240bab0d72eb2b325b9ff4f4ff02789d2d6a. 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/QZPJ32319584 — a six-check JSON result.
The Road to the Valley (Nausicaa of the Valley of the Wind) - Lofi Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5402135ec7f6e97131648bfe86e1d5ed9fd9d3caaabf75663d1695e9ba529d. 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/QZPJ32319589 — a six-check JSON result.
Setsuko and Seita (Grave of the Fireflies) - Lofi Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed23418c277d31e5c0ac6914d8ce76de37d25f1be7ef9670f64c52d429a00b40. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZPJ32319587 — a six-check JSON result.
Rondo of the House of Sunflowers (Ponyo) - Lofi Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d997ff2db47d66042eba2a6ab3851f38ee028b736ad95cf6fa4e1322ea589d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZPJ32319586 — a six-check JSON result.
Call of Silence (Attack on Titan) [Lofi Version]
YouSeeBIGGIRL/T:T (Attack on Titan) [Lofi Version]
Red Swan (Attack on Titan) [Lofi Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c69aa98584971aa87578510792fce63e90a125260c5621743983f148e474c8. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE6SA2454256 — a six-check JSON result.