is a Japanese composer, pianist, and lyricist. Hamauzu, who was employed at Square Enix from 1996 to 2010, was best known during that time for his work on the Final Fantasy and SaGa video game series
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 0xe71eb75abe453ee3eaaa2a04606cc24dc094b25675fe969f34ec743858648dd9. 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/fbfd1cc7-3486-4880-b613-899a48f05e44.json and https://artists.proofprofile.net/proofs/artist/fbfd1cc7-3486-4880-b613-899a48f05e44.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Masashi Hamauzu Piano Works Delta / Epsilon / T_Comp1
Masashi Hamauzu: Opus 4 - Piano and Chamber Music Works
The Very Best of Masashi Hamauzu (For Piano Solo) [Music From "Final Fantasy" & Other Projects]
Final Fantasy XIII Piano Collections Special Edition
Saber's Edge (From "Final Fantasy XIII") [Orchestral Cover]
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 0x9c3841dde0656084a1d2c74e0c07f5e127fb900d1771deacfcc8b8a9ec0d86df. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCJPE2532154.
Hallstatt-Dachstein / Salzkammergut Cultural Landscape
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2001c35bca27142f38da6269fc294c583780c5073f1ea581c89406b18166f4b9. 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/TCJPE2532622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2276e68da89f53751c00f97c677bf9497d50b66eaa6fb2ec76df4b944d2369a3. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCJPE2524731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f2b016ce62258b00b79953999e202ac9c29490dc452d82ad02bfc939dfc61e. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/TCJPE2525163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348feb03885e7ccc850548c42205131dcbb3946f06b4f40f636f998888576e76. 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/TCJPE2525191.
Historic Villages of Shirakawa-go and Gokayama
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658bbf9c90eee49008bd0df5fabaf8696289ef32ce1c8f1dad5d0aef86ba999c. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/TCJPE2525245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88f5580ca0a875022e3a331568d6937f6ef9d76755231ade17f85b0908b9e77b. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/TCJPE2525258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8765bf3564ad7d50d3f4056ba44340dbfe1ddeb18b4475849137b7a90e04658. 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/TCJPE2525432.
Memphis and its Necropolis - the Pyramid Fields from Giza to Dahshur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a06aaefa47ff58c9b5c82f52cef15f0ce5d84797dada727baba1f561e834d9. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPE2525561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3434bd21bd05efcf60540685e0cbb540291076f67773f9fa8b450b945fc12a92. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPE2532722.
Masashi Hamauzu Opus 4 Études Piano Collections
Blinded by Light (From "Final Fantasy XIII")
Distant Worlds III: More Music from Final Fantasy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bcd49387da359780e7ccb9db91d85fdb23c66c36ae93cd74c7c8672371b1a9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USBVN1510808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccd107063d63f278bb3bcf6102e8c2c70e78869254e902654cbb356c028737e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEWDL6018214.
The Land of the Fayth (From "Final Fantasy X") [Besaid Island]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba7bbd43929a0456e2958a39d1eaf0206844d7211ba231346a74d588114076c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGWW1961547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf92a919eaf802e8ff6ccfd469b0bee7c62b18e67ea72b9870942670c1a7c9f. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/SEWDL6141624.
SEELISCH TACT CHUNITHM Original Sound Track
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1359189a8a84b5f40439e796754f55244ee4e9ac852155dd38b402030daa79c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCJPM2076610.
Jessie’s Theme (Final Fantasy VII Remake)
Final Fantasy VII Guitar Collection, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591748b3ed037db64cbaa13da4d10051a6c2cba645041906ccb041a1b84f8c32. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZES62461030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1277beae5c83fdda816772572f11078ac5f4f5116737c3750be696bc3ab9d912. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM92051790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8278fb9f774eff6e778d327201c133e64d0198078c560d12d573d8f89304d34. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USHM92051791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616802a7481ac0cb6f435f9b7a49db567e8fcde022a05bd1370818cde02d9334. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USHM92051792.