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 0x323b52c9d1a9e0c894307a4bd25720fe85bd3a65c2ca5ebb9bcd792d6bd51e21. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/215e89d8-a596-4a4d-b4ec-03d9da04813e.json and https://artists.proofprofile.net/proofs/artist/215e89d8-a596-4a4d-b4ec-03d9da04813e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xd72238f186dfe2c71a500f497dbfca28b6cb82dc655235503b6dc5db7ade170a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USE830993919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bba3b89b7ba107228f946e15b6afd9e3ac36f001d9d32811de93e868e676bc. 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/USE830993923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79e7ed5ce27373dfc2707e07f17b86c899f2bd9cc2be219cdacbde0cecb0636. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/USE830993927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2849478aca0280ddfff92e5448f03d57b5ab8a8cb3224cb5156345aff1d7c3bb. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USE830993929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d3679607abeb309941279864d9f727a22b6449ff9c23e3c5ad9dffa5ceb942. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:08:59Z), 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/USE830993931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0951d61dee96e578da43af21a1182bd67c7f39f5beb7e2fac7d76752d0a5b9fb. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:57:03Z), 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/USE830993932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf17d769fec3f864fb36583b6d64a8964606d83e045bebdd7b80b55194a2a62d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USE830993933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x929d79c3cceaa75bd67c119f437a599ab6105258b630bb34dea9bbaab240bfe9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USE830993925.
Wind Crest ~The Three Trails~ (Final Fantasy X-2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504289e428a122a43fb9debc4a966454c24ecbc105873447debd98d02c4eeeda. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:53:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USE830993934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bd00abc5ec6894c95650b14cd7fd4f0bc7a69805436040d1e90cc970895f8f3. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/USE830993935.
Eternity ~Memories Of Light And Waves~ (Final Fantasy X-2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02831847331a3f83b0d88f8b82abce9a5d7b7abdbbf5f452947811495db1a247. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USE830993936.
Frontier Village Dali (Final Fantasy IX Piano Collections)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2d07a225152eab75b80425d27bd523494489678749a48bca9ebea7e6670dff. 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/USE831586523.
Via Purifico (Final Fantasy X Piano Collections)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf417ce462759ed0b7cebcefe04b6f485eb7958216e3e98b9e6eaa4d2713a487. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USE831586527.
Yuna's Ballad (Final Fantasy X-2 Piano Collections)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840e3d42ec3db8fbadce12ceb3eec4c3913fbbc70973933774be93bc6b408a04. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USE831586529.
Mia & Sebastian's Theme (From "La La Land")
Learn to Be Lonely (From "The Phantom of the Opera")
Final Fantasy: Piano Collections, Vol. 2
Welcome to Our Town! (From "Final Fantasy IV")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ef6edb546a7dc5b1919b8ca32837b04941648a3da88ed2d2b1aabc0f979aaf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZ22B1814852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94da0fd31a4e102c7affb3daf633e445fae6a67a7a5a67a91094645d3c920066. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ22B1859301.
Final Fantasy: Piano Collections, Vol. 3
Yuna's Decision (From "Final Fantasy X")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0241640a3acfd6ed8ce85a14955282e4ef00a4d271a2207e681015d8add7e7b. 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/QZ22B1991782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea0b3eb816456cfd1cfbc2394e8866938a3b3008c7de50467911279668e529a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZ22B2064757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba2858964be78d6b2c033a3c86aa0eaba62cadd6ab4c662fb5d48724a67fa06. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZ22B2064760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefac92245cfe7e138d8d9bd09e4fc54b7938a37091bf2101575cb8808836576e. 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/QZ22B2064762.
Final Fantasy: Piano Collections, Vol. 4
Remember Me (From "Coco") [Arranged by Hirohashi Makiko]
NieR Gestalt & Replicant Piano Collections
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3268ad420c3954c37c4d99386eaa761a666738bb01d0cca2ebd48e54861bb06. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZGWW2099607.
Tonari no Totoro (From "My Neighbor Totoro") [Arranged by Hirohashi Makiko]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c99df4f1077407df389fb361f4772c7f3815205cd5a755677ad73bcce3c612. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZGWX2139241.
Summer Of Farewells (From "From Up On Poppy Hill") [Arranged by Hirohashi Makiko]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4568c9f968956341522d57cf3d208f8e24a95bfefc732ad4e8e444a8a3b5c30. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGWX2139242.
Merry-Go-Round Of Life (From "Howl's Moving Castle") [Arranged by Hirohashi Makiko]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d33f73e9c9ce6a1695aa32465689dc28d6089729d812edba7ef4e3044d0ea9d. 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/QZGWX2139243.
Carrying You (From "Laputa: Castle In The Sky") [Arranged by Hirohashi Makiko]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf242a20e6bd6a7a04b76d71e5c64d2bcbeae04bb95d8da55d757c2e70e25f29. 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/QZGWX2139244.
Mononoke Hime (From "Princess Mononoke") [Arranged by Hirohashi Makiko]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c98c0e558fcb75b37ad6d00bd4315cb9f52be8a80132863abb7510bccc3349a. 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/QZGWX2139247.
Ashitaka And San (From "Princess Mononoke") [Arranged by Joe Hisaishi]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57321e9b260b118c5142993d4a659b52eddd31d4d0c1293588b1c889cc80a36a. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZGWX2139248.
Innocent (From "Laputa: Castle In The Sky")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499e93ccc352cc47f8657c42c311b41361b05d75f4619d89c5824647453edf13. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZGWX2139249.
Teru's Song (From "Tales From Earthsea") [Arranged by Hirohashi Makiko]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36c8a849d6069ca7642bf0244c7225511efb6b1639686ac2d0a3e2fc2d0fe9f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZGWX2139250.
Once In A While, Let's Talk About The Old Days (From "Porco Rosso") [Arranged by Hirohashi Makiko]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0ea3be00b5cb38ada5f75c433fcc14cc31a13c6fad158e8d18ceddc2165bcc. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZGWX2139252.
ICARO -Piano Arrangement- (From "Shadow Hearts: Covenant")
Rydia's Theme (From "Final Fantasy IV") [Piano Collections]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed70af9a02fc3449344de9c6e71fe7f426457cd8b7c23fd9e1c0173454bd719e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32123494.
Penelo's Theme (From "Final Fantasy XII") [Piano Collections]
The Tower (From "NieR:Automata") [Piano Collections]
The Fading Stories -Qingce Night- (From "Genshin Impact")