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 0xbc350315485416647b7a3e89499309b801551abebdf63d24740c5d6b0686c25b. 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/9fcf6a22-da86-4250-95c5-376db2f1d609.json and https://artists.proofprofile.net/proofs/artist/9fcf6a22-da86-4250-95c5-376db2f1d609.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0xfba8e09cc376f3c4d8ff42c5adc90360b0d083770eca562cd264a524020d22fc. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ22B1958036 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9fcfa6f1d333793a3f86bce181ff53e58259cfe189f0ceed31c54eda2131248. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ22B1958038 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd8d670443a6baa438b34cbde9e238830d994de9baba9b145a0cfa7cc827d9c. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZ22B1958032 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3ac5ce13f9d646a1ea01dc68376e2b0054412fa8836d06dca8bcef0583511f. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T00:05:41Z), 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/QZ22B1958034 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42169b8edb4f345a83bc9dbde9c7bf823dec72f7988d342ab076ffa43f632af6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ22B1958041 — a six-check JSON result.
Melodies of Life (From "Final Fantasy IX")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b0332ab30c97d1c428601b231bfb0346a73b78951497d6a637593d825c69c2. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZ22B1958033 — a six-check JSON result.
Waltz di Fantastica (From "Final Fantasy XV")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80118dd4ce59686e333de1d17ce53b4e37cf3eb6fe9f7e31314b14bdeb731fb. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ22B1958039 — a six-check JSON result.
May I? Stand Unshaken (From "Red Dead Redemption 2")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1457b74835ae6fc298b6bde2b2c693d518b2c0808e30e4e82f5cbc29d584d0. 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/QZ22B2095069 — a six-check JSON result.
Dancing Mad (From "Final Fantasy VI") [Piano and Pipe Organ]
Final Fantasy VI Complete Soundtrack (Piano)
Awakening (From "Final Fantasy VI") - Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1488be7aa3686684104b47484ac1192d1d20e9269d4daa170d12a9b0bcaa9ef9. 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/QZPJ32107710 — a six-check JSON result.
Forever Rachel (From "Final Fantasy VI") - Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4cbfd0003d8768f7e30cbe9fdbe129b18e6367b5258fc955f16a39c8d2788f. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/QZPJ32107737 — a six-check JSON result.
Aria di Mezzo Carattere (From "Final Fantasy VI") - Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3360e158c9d705e86f2391c1734ea3b967ba5fa4957a0b37ea43dca07240780c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32107740 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa97e01bd5669058a3f0f34095b228e25635ee77ec19b221a60e2e61323a9df9a. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZPJ32147786 — a six-check JSON result.
The Boundless Ocean (from "Final Fantasy III")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a7176d6d626a923aa7ace5207ecd83ee6313403dc9cae1b2216ff24af11334. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZPJ32147788 — a six-check JSON result.
Wood Carving Partita (From "Castlevania: Symphony of the Night")
Chrono Cross Complete Soundtrack on Piano
The Donkey Kong Country Piano Collection
Title Theme (From "Donkey Kong Country")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08215868299f0cc8df793f6e377088927268913a67f6a5359233b10b7323a0b6. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/QZPJ32238732 — a six-check JSON result.
Chrono Trigger Complete Soundtrack (Piano, Pipe Organ, and Harpsichord)
The Donkey Kong Country 2 Collection (Piano and Organ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e84b1424957ef63bcfb4e6f2bc8a6780a873234a0722be8a39188f3f3ddd89. 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/QZPJ32313295 — a six-check JSON result.
Final Fantasy 1 Complete Soundtrack (Piano and Organ)
Final Fantasy IX Complete Soundtrack on Piano
The Nightmare Begins (from "Final Fantasy VII")
Rosalina in the Observatory (from "Super Mario Galaxy")
A Lifetime of Adventure (from "Music Inspired by the Life and Times of Scrooge")
Adesso E Fortuna (from "Record of Lodoss War")
The Beginning of Our Memory (from "Xenoblade Chronicles 2: Torna - The Golden Country")
Be Absentminded (from "Tales of Phantasia")
In a Snow-Bound Land (from "Donkey Kong Country 2")
The Sanctuary of Zi'Tah (from "Final Fantasy XI")
Flowers on the Battlefield (from "Final Fantasy XI")
Song of Storms (from "The Legend of Zelda: Ocarina of Time")
The Queen's High Seas (from "Divinity: Original Sin 2")
Embracing the Light (from "Ori and the Blind Forest")
Into the West (from "The Life and Times of Scrooge")
The Metroid Collection (Piano and Organ)
The Girl's Memories (from "NieR: Automata Ver1.1a")
A Sea Breeze Blows (From "Octopath Traveler") - Piano
A Traveler's Respite - Piano Tribute to the Octopath Series
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd39017bdad71d506bbcfb667103d147c6b8b953f319ba5a6e50d60f45a5fee. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZPJ32380161 — a six-check JSON result.