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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc318f61640426e3d794118fa29810d35cd0c094e69310a87c9077f7974f66fa9. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f7897e7-7ae2-4a30-8fce-3737aff7f57a.json and https://artists.proofprofile.net/proofs/artist/9f7897e7-7ae2-4a30-8fce-3737aff7f57a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nintendo RPG Tribute (Vol.1) - A Mana Trigger
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7358a4b2413f528985bd75b79542291243444bb034c01babf1c7cb86e83a61. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USE831557845.
Once upon a time the Cinema (Vol​​.​​1) - Film Noir & Other Gangster Movies
Once Upon a Time the Cinema (A Tribute to Kenji Kawai)
Kodoku Na Junrei (From "Fate Stay Night")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a6a9ce06203a492fa249917ffa7a98e20172f87f4395d13c0ca2e5eaf8444d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USE831589882.
Once Upon a Time the Cinema, Vol​​.​​4: Science Fiction & Other Voyages
Once Upon a Time the Cinema (Dark Japanime Tribute)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24db6d69f7552d8d732f3d3c09aab5263ea159ea35fc3723357809087976f85f. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USE831591709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88674f063d066501955d0bcf9d4691ed1eec7648f8d28398c9647cd29adcfce1. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USE831591718.
Once Upon a Time the Cinema (Light Japanime Tribute)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2709111942dc8a3b1b73e41efa9914704b752b9101f490941e75388a97bb5c18. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USE831592168.