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 0x078f72ff313874111a8840f2e96ea0a08ccd58350f4afe48b0346b9ec9a290f5. 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/c0971ada-b647-4a0a-b988-82765d80ef10.json and https://artists.proofprofile.net/proofs/artist/c0971ada-b647-4a0a-b988-82765d80ef10.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
You Can Become a Hero (Boku No Hero Academia: My Hero Academia)
A Cruel Angel's Thesis (from "Neon Genesis Evangelion")
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 0x5b78f7ec9652b19e03ded11d401d51864f99f6e46730cb5739d604f371009832. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32104865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb493e203769606ee36fbf0d503c5687511985b9e596e314d14871b6933560d4d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32106635.
Nocturne (The Duke of Death and His Maid)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb711fe606113d3bb97fd73913faae403618fccaeeceb6b1025af3a4f902840bc. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32106644.
Mangetsu To Silhouette no Yoru (Shinigami Bocchan to Kuro Maid)
Path of the Wind - From "My Neighbor Totoro"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4cb3e988822afb0630c316b8c2833c7034501c55d3f2a61f779a51da754d51. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2177111.
Again - From "Fullmetal Alchemist: Brotherhood"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32742b4835aab00b49c59c20b7009d7270184c1a2568b65be2f91fb39f8b6c14. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2177107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e34e17907388440c40b614b0da7a8b05797c1489769e11a1a1dd42b20bc335f. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QM3DF2177108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca4e75858f14061771e1483934692605f38884ad22efc9ed6f9f80cc4763766. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM3DF2177110.
Akuma no Ko (Attack On Titan: Shingeki no Kyojin)
The Rumbling (Attack On Titan: Shingeki no Kyojin)
Sketch (Boku no Hero Academia: My Hero Academia)
The Day (Boku no Hero Academia: My Hero Academia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1f7c224c01bdb73166712451f06c992405e09fa0e53f0fc0f508357160966a. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USANG2216328.