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 0xe741cbce4291589f4cd56062a4d37b11804685a82c3a1027d052af783c0761d8. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab5b58bd-8fbe-47ee-9733-611e4ce3785e.json and https://artists.proofprofile.net/proofs/artist/ab5b58bd-8fbe-47ee-9733-611e4ce3785e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Melodies of Life (From "Final Fantasy IX")
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 0x860ca83439e88219261d0067a9739d632934b0930181e24b3827b30aa2cb5a88. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/QZGWW2117577 — a six-check JSON result.
The Farthest Land (From "Shadow of the Colossus") [Piano Version]
The Farthest Land (From "Shadow of the Colossus") - Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad862e4afabc3a1660b3fdae23afa46c46e1bbaae21dd2ea8bf1f7bfd208539. 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/QZPJ32139768 — a six-check JSON result.
Somnus (From "Final Fantasy XV") [Piano Version]
Somnus (From "Final Fantasy XV") - Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a5c2591b14e2dd5c44f76c98f7152a52b0b68bd08f5fdcc328920b07c63880. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZPJ32139843 — a six-check JSON result.
Main Theme of Final Fantasy VII (From "Final Fantasy VII") [Piano Version]
Main Theme of Final Fantasy VII (From "Final Fantasy VII") - Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9730f355afe79d82792e3b07155f0ad8af176edc848b2fda96c1907c304cf217. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZPJ32145156 — a six-check JSON result.
Critical Clash II (From "Octopath Traveler II") [Piano Version]
At Your Back (From "Octopath Traveler II") [Piano]
At Your Back (From "Octopath Traveler II") - Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf96906ed22fc127b96d88d1e9878ba17ce7a063d1da26e2f295173bb8d67aae. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZPJ32336472 — a six-check JSON result.
Where Flowers Fall (From "Bravely Default") [Piano]
The Sunlit Earth (From "Shadow of the Colossus") [Piano]
The Uncharted Isle of Orsa (From "Octopath Traveler: Champions of the Continent") - Piano
A Traveler's Respite - Piano Tribute to the Octopath Series
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef553b2e26021296d913127df862fd25a3dd0237b092787356c1295e0c202a4. 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/QZPJ32380164 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d596b7999bf591f86e2212e88a11e09ca8eb695a1b333ea5d9ab8365f6fc95. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZPJ32331989 — a six-check JSON result.
Path to the Celestial (from Bravely Second)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ce3f759a0d1b25427ac72d3d8fe629e0d537886c6fb5b1dbbd89fa28b2ec54. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZPJ32276519 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa6c7741bc70c629468e77821d199783c1a99e69fcfc140976f57045dd86b86. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZPJ32336450 — a six-check JSON result.
Vector to the Heavens (From "Kingdom Hearts III: Re Mind")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84d839ba7863cfa42f99be45c19257d5d52b42e8cb9e978b05fec2079719a68. 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/QZGWW2071311 — a six-check JSON result.
L'Impeto Oscuro (From "Kingdom Hearts III: Re Mind")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd50b31eef6c10c851bab507725fafbd1d11bb5dbde7f07f68e769c8d54be255. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/QZGWW2056264 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd50b31eef6c10c851bab507725fafbd1d11bb5dbde7f07f68e769c8d54be255. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZGWW2056264 — a six-check JSON result.