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 0x52fb79740fdd8a2ccefcd13da3edcf757e5930986adb78cf30f4e81d5dabc448. 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/5d5a8387-9f2a-4bb1-868e-15fdfd687e33.json and https://artists.proofprofile.net/proofs/artist/5d5a8387-9f2a-4bb1-868e-15fdfd687e33.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piano Fantasy: Final Fantasy XIV Piano Collection, Vol. 1
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 0x759add3965f925995274880e015829a867f62845b40830914968fef847bbf0f8. 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/QZ22B1635090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7261c6de8ed48a3c9bf5b3eb996e3c5573c33a2b7302dc14e933fabc989f5e2b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ22B1635095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba4b56b465bfd97e08ba17ff48653da11ff50ea3a709c866814478d83bf75c9. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZ22B1635097.
Piano Fantasy: Final Fantasy XIV Piano Collection, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c0b0dc40249d200db31b4702cd2d5ee1bc3094a5d276a36c158de767c1923c. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZ22B1765515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3fc708f376928b8534275ca6f81b47c5f62a28432397ab84061e4031df1270. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ22B1765517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c45fbc73a827ddfe361dd9c4843b5c8feb487a75fe543925b5db63377ee810. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/QZ22B1765524.
Piano Fantasy: Final Fantasy XIV Piano Collection, Vol. 3
Piano Fantasy: Final Fantasy XIV Piano Collection, Vol. 4
Piano Fantasy: Final Fantasy XIV Piano Collection, Vol. 5
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f07503a3c61c5af7b8a76f326272dfdba263be9f29fe9cf57d2776da160670. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/QZ22B1940731.
Piano Fantasy: Final Fantasy XIV Piano Collection, Vol. 6
Piano Fantasy: Final Fantasy XIV Piano Collection, Vol. 7
Piano Fantasy: Final Fantasy XIV Piano Collection, Vol. 8
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6b50e7651b2208c8d41556d89d85e74db17b14b95147309d70002066292d49. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGWW2134645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c48a564f3ca91a1f1e827f73c8704b5969b52092008f082be6933a47ee85050. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZGWW2134646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3791dc22e9633e06ff6106b8f238161acf39dd44cde3c2b9b7843a172b8b264e. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZGWW2134647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fa9d1f8f0561b20df428425a1975b7a86e82804b90222be2c2e4ca26882112. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZGWW2134648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1062e678824c96cbd5af11cf428efed9dbc4f0500b7b7f899f0d27aea3e5479. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGWW2134653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0900b8f026af37d8871cc2555b122e111276063e7a44794568140c31c6960df7. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGWW2134654.
Piano Fantasy: Final Fantasy XIV Piano Collection, Vol. 9
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bea1ddd5aa0a444d1c5197934b8c9fa5ae1f16299d9f8d3a4873384028472c. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32107870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b71fe270dd111f8e5fbc6678f3c624e6ff3821efadff35ebe75f036d66f595. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZPJ32107871.
Piano Fantasy: Final Fantasy XIV Piano Collection, Vol. 10