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 0xa5c875689e16f5de67fadc99928c3370f6ff59e1ce558d27ffff4f7fb4c22033. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/845eb3cd-663d-4fa8-85a3-5dd0b92babdd.json and https://artists.proofprofile.net/proofs/artist/845eb3cd-663d-4fa8-85a3-5dd0b92babdd.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
C-Busters: A Tribute to Mega Man Classic
Massive Explosion (From "Final Fantasy Dissidia NT")
The Brink of Death (From "Chrono Cross")
Makenai Ai Ga Kitto Aru (From "Mega Man X4")
Moonlight Temptation (From "Bloodstained: Curse of the Moon")
The Battle for Everyone's Souls (From "Persona 3")
Caelestinum Finale Termini (From "Genshin Impact")
Every Day is Night (From "VA-11 Hall-A")
Dad Battle (From "Friday Night Funkin'")
Stress (From "Friday Night Funkin'") [Metal Cover]
Oppressed People (From "Final Fantasy VII")
Proof of a Hero (From "Monster Hunter") - Metal 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 0x40f933973bd4053aa13baab4603f393938b2b9e68df2cbb254d71f4d78dbc7c4. 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/QZGWX2230035 — a six-check JSON result.
Will Power (Metal Version from "Persona 5")
Frosty Village (From "Diddy Kong Racing") [Rock Version]
It Has To Be This Way (Metal Version from "Metal Gear Rising: Revengeance")
Spring (The Valley Comes Alive) [Acoustic Version from "Stardew Valley"]
A Stranger I Remain (From "Metal Gear Rising: Revengeance") [Metal Version]
A Stranger I Remain (From "Metal Gear Rising: Revengeance") - Metal Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede0add83da9031c52f9fb417aa27f0185f4335da124754a9081faeb95b82a9e. 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/QZPJ32184432 — a six-check JSON result.
Daughter of the Dark God (From "Octopath Traveler")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede0add83da9031c52f9fb417aa27f0185f4335da124754a9081faeb95b82a9e. 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/QZPJ32184432 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3b70d0eb7f0779a194ca76b7341f069bd2894f8af33cf4f79c561858460e7d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZPJ32486218 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb076249b800afc2a6ce42af54c4007f7c141aa97f28505f4e9052224bf05db29. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ6K41700725 — a six-check JSON result.
Fly in the Freedom ...Theme of Rouge (from "Sonic Adventure 2") - Jazz Cover
Learn: A Villain's Tribute to Sonic Adventure 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55624508f70efa875958f7397958f04e1e5751e08832bbd90270642d5a238897. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZPJ32144669 — a six-check JSON result.