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 0x7c32a74d9152961c9f51cd65ae4106c069933bbd72015e3fa71f034065759129. 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/9ef128f2-6107-4146-80ed-9b33e870600e.json and https://artists.proofprofile.net/proofs/artist/9ef128f2-6107-4146-80ed-9b33e870600e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Soundscape of Mt.Fuji -Nature Sounds at the foot of Mt.Fuji in early spring-
Aokigahara Forest in the early morning -Wild bird chirping-
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 0x917d508ea3ea1c4dcb7b9bae9da72e7fea9ec340975c00935bd5779f76b45dcf. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU362145302.
Birds twittering in Saiko Wild Bird Forest Park
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bbf303ad987ba01919c03dc07e5984b6a959181aeedce8461f3c6293ca83f7. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU362145307.
The Soundscape of Island Trip -Wave Sounds of Shikinejima Island-
The Soundscape of Island Trip -Nature Sounds of Shikinejima Island-
The Soundscape of Headwaters -Nature Sounds of Kosuge Village-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3400f17486008c023aacbb8350382c42fecdd92cab92c8c94803eb55f91161. 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/JPU362045113.
Stream and Birds in Forest near Yagyu Shrine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189a1bf1c728f58b71d21e01150c163d97a7934592e26cc41432f7e067b01f39. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU362045110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d765dd7a5c97b2b87c690808481e453c77dfa1c002e6f868f1130c3e08538e9. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU362045101.
The Soundscape of Amami Oshima -Nature Sounds of Southern Part-
Wave Sounds with Rolling Stones in Honohoshi Beach
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceaf052e53d5e4391646474a585aff913289a98db7f84daa86f2e3653f28cbc6. 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/JPU362045301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e5fd9868049d71210fc63fd5f3d4ae83c4dd291c40303e75a86008be43cd37. 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/JPU362045302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215986da16868b3007df96d9e2fc855e79d052db3b013af4b1a4ff4866ba1a98. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU362045304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f637497771b7acd18e9acea6532cc53963412f04c4e13730405d0b3f0ad71b4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPU362045305.
The Soundscape of Amami Oshima -Nature Sounds of Northern Part-
Nature Sounds in Kinsakubaru Forest -The Silence of the Morning-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e6fe4f2b19c0cc23f1002c4a16166e5fe6a0691c3676927af4065521905c4f. 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/JPU362045401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd360ff4afdcc538a77a9f23db844cc456830e908caeb8b09ce2dc080f6ebcf3. 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/JPU362045408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb122ed4c2846b4661b8ac05d7572e8b3790c97326ee25250597352371f5cd94a. 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/JPU362045409.
The Soundscape of Amami Oshima -Nature Sounds of Central Part-
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c3683f2a706732d920a3e1753482693dc030bb16c7eb2f7cbf5f1f85b98fb0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPU362045201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa8b2e8f921115c000d5b6b7b67e30b7e1d3f7c4c770ab15d4d6f60d0973dea. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/JPU362045202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abdf055c33d4c2ff4929f0c1d854bc5b04b6ed16038e1163cfd6dcc8bb4143e. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/JPU362045206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa600af49d6ff0d3a9d3bf7a98e39c01a761221c976b388d754ca93a837c2003a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/JPU362045209.
Water sounds of Wasabida (The Soundscape of Kosuge Village)
Water sounds of Japanese Garden, Nipponia Kosuge Village (The Soundscape of Kosuge Village)
Stream of Konagata (The Soundscape of Kosuge Village)
Stream and Birds in Forest near Yagyu Shrine (The Soundscape of Kosuge Village)
Singing Birds near Kosugenoyu (The Soundscape of Kosuge Village)
Shirasawadaki Waterfall (The Soundscape of Kosuge Village)
Shiraitonotaki Waterfall (The Soundscape of Kosuge Village)
Rain sound in Matsuhimetouge (The Soundscape of Kosuge Village)
Rain in Forest (The Soundscape of Kosuge Village)
Odaki Waterfall (The Soundscape of Kosuge Village)
Mt. Mitsugo and Birds (The Soundscape of Kosuge Village)
Kosugegawa River and Trees (The Soundscape of Kosuge Village)
Kosugegawa River (The Soundscape of Kosuge Village)