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 0xc1f061133c1003160c2608336ffa77215d280f5fbd20c65779f4804d010a40f7. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e021fb6-1f88-42de-8a2f-1533d88b9a84.json and https://artists.proofprofile.net/proofs/artist/4e021fb6-1f88-42de-8a2f-1533d88b9a84.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
FINAL FANTASY Record Keeper Original Soundtrack
Mystic Mysidia -Halloween- - FFRK Ver. arrange
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 0xec84ead5d707cb80fc4912ab377326b145740ebbb0f3d46636f162ddb50eb016. 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/JPA841600423.
Battle at the Big Bridge - Ver.1 FFRK Ver. arrange
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb220fca21ba2c42a4d070ce97ed067a443cafaabec23ab67c050bccead78e906. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPA841600424.
Battle at the Big Bridge - Ver.2 FFRK Ver. arrange
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cd62e546e77998f5e8ecde14bbe529a9299fb22f2947747f9809ab8a42e30c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPA841600425.
Battle at the Big Bridge - Ver.3 FFRK Ver. arrange
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc7b423fc8257f3ff34142a8ae85c29950617464d1cbf34129a5833aabd7ee9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPA841600426.
Special Arrange Medley - FFRK Ver. arrange
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86921057e2078f73757ea2ad390f8abdebd4399110c010bc23d63289184100ad. 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/JPA841600429.
Medley of the braves 2016 - FFRK Ver. arrange
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530c262049959a770917057f65e6f72b4131a6ac2615ee540141ef3252f5375b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPA841600431.
The Decisive Battle - FFRK Ver. arrange from FFVI
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25c6bfad6925fa54d58de1746dc954fb89252daba9205cceb504d7abdaecb3b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPA841600432.
The Man with the Machine Gun - FFRK Ver. arrange from FFVIII
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973496bcc7859002ad0b589a0bdff87a67393f4a7947e246c8de240020187627. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPA841600433.
The Highwind Takes to the Skies - FFRK Ver. arrange from FFVII
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5e42af6c1e4ab5591c0e58265624113fcf9f778f07f57b21cdd9f13e3dcff8. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/JPA841600434.
The Prelude -Wedding- - FFRK Ver. arrange
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1bfb5493f2a84a688198c4197632158c59624ecc72ebf688925cc502559430. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/JPA841600436.
Battle With the Four Fiends - FFRK Ver. arrange from FFIV
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042e61b796d2e819146188479b79c1e7c5732d56ba93e2e4e9bbadc2c761c836. 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/JPA841600437.
Medley of the Milkyway Serenade 2016 - FFRK Ver. arrange
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0763c1d7421f309f37c14ac0cef54abc8d07fcdf1274215efe0d2637f2c2aa6e. 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/JPA841600438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6440a72084adcb1802ea39a45a73ec97d33cca2d8e97b9fec961417b792ee36a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPA841600440.
Blinded By Light - FFRK Ver. arrange from FFXIII
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65963dfb8f1fbee4b03155c005254c9315b45d63f568d087ace184d592baff76. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPA841600441.
The Chase - FFRK Ver. arrange from FFVII
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78633cf2abc0127282af690e96c8c28dbe29bb26a39030c19191ecd9e8cf60d5. 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/JPA841600442.
Medley of the Valentine's Day 2016 - FFRK Ver. arrange
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b31c631567b86dbd9dd1d2dc9b9122b130228d0c0d862a36a4130e24c22001. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPA841600430.
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