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 0x589cd5ad5d59b915020b473f71195a6f90846ff1f2fd91d7cee212c5fead49f1. 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/c5eae4cb-a392-4fd0-afa3-82df16813f2f.json and https://artists.proofprofile.net/proofs/artist/c5eae4cb-a392-4fd0-afa3-82df16813f2f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
A Traveler's Respite - Piano Tribute to the Octopath Series
Dear Travelers (From "Octopath Traveler II") - Piano
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 0x831a4f8d88c6b356ac19c01af5a6e080526bf95cff7f3eeeab21428a93dbcb17. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32380152 — a six-check JSON result.
Hikari, The Warrior (From "Octopath Traveler II") - Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6c50837affc75c63758e9eccbba23d8dd8a8a85ec3ac436e3ad59608fd2302. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32380153 — a six-check JSON result.
The Sunlands (From "Octopath Traveler") - Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89cfcb867018da12e4626912ea44b4d2580016e305b3be452ed731b04c50f376. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32380154 — a six-check JSON result.
Home of Wisdom & The Arts (From "Octopath Traveler II") - Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf073f8f28b18e94ea1556734273790ff65794dde81da7fea633c5266435ebd6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32380155 — a six-check JSON result.
Castti, The Apothecary (From "Octopath Traveler II") - Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a16dd0f111627a0b5325f8724abae0cc2b5131454032847ee81fa664ba7499c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32380156 — a six-check JSON result.
My Quiet Forest Home (From "Octopath Traveler") - Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c4fbaf44e8a44eb015ff9a0e04b95d1426aba02381b0fc07d3cba9983b0ec9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32380157 — a six-check JSON result.
H'aanit, The Hunter (From "Octopath Traveler") - Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63e5c90133ccbb2e96797f439a3ff722afa2ee1ae75f9221412eac148fddcb76. 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/QZPJ32380158 — a six-check JSON result.
A Verdant Wind Blows (From "Octopath Traveler II") - Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6dd8c7e312c26194ee91acf6cb4f8a9c769547f78a72b848a331529e7d4689. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32380159 — a six-check JSON result.
Ochette, The Hunter (From "Octopath Traveler II") - Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf108d539b41d0f0be0ade102afaad19de5ab74e410b28d0a0d3fbd40834d14c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32380160 — a six-check JSON result.
A Sea Breeze Blows (From "Octopath Traveler") - Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd39017bdad71d506bbcfb667103d147c6b8b953f319ba5a6e50d60f45a5fee. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32380161 — a six-check JSON result.
The Crestlands (From "Octopath Traveler II") - Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7970a4b251524d9369ee82000680fabdff94b0b74b4a7d2957fcff61ae2bfa. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32380162 — a six-check JSON result.
The Winterlands (From "Octopath Traveler II") - Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b2f27ccd5a1150223b2ea14b9e94a5e8c670c6dca725ef4eaa2eeecfba34f7. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/QZPJ32380163 — a six-check JSON result.
The Uncharted Isle of Orsa (From "Octopath Traveler: Champions of the Continent") - Piano
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.
The Frostlands (From "Octopath Traveler") - Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5770461fb9bcf6bfcecd39737609b17412b766f078d60a34c5a50d7b56c3663a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32380165 — a six-check JSON result.
At Your Back (From "Octopath Traveler II") - Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b8f8560b4d3a620f2df9512539b0bedad6f72c3f3bcb138520cf606f9935ba. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32380166 — a six-check JSON result.
On A Knife's Edge (From "Octopath Traveler") - Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002ef4bf9051fcec812de8e2b82f153b867800723efd431d8109e38f54eb82de. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZPJ32380167 — a six-check JSON result.
Soliloquy (From "Octopath Traveler II") - Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5903839206acdbaa6ab6647ac92406acb6cac59cd87e4a649b989b99f6c4ff75. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32380168 — a six-check JSON result.
Those Who Deny The Dawn (From "Octopath Traveler II") - Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1a8745fe689d1ebc2db796071b76a35eb0d568848f4f2023d2d795c48d8bf4. 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/QZPJ32380169 — a six-check JSON result.
Song of Hope (From "Octopath Traveler II") - Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3ecdfde9ebf35db9add94c55cb79a7629341d5d5c78fb0ac130269cf9e62a8. 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/QZPJ32380170 — a six-check JSON result.
Determination (From "Octopath Traveler") - Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff82bca191b84c40481cc52d8186e17db98ba6f2598d41a6e9ec22ed7ff3f1fc. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPJ32380171 — a six-check JSON result.