thumb|upright|Nakada Yoshinao in 1952 Nakada Yoshinao (中田喜直, Shibuya, Tokyo, 1 August 1923 – 3 May 2000) was a Japanese composer.Asahi nenkan: Issue 2 Asahi Shinbunsha - 1992 "中田喜直なかた,よしなお 1923 ..."
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 0x1320daaaf19ad9ab2cc6e2ab3320f8663bac08e3ac64b958f7a0a71adcd8f5b1. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51e6ffea-18b5-40d6-b0ba-1b59d18857e8.json and https://artists.proofprofile.net/proofs/artist/51e6ffea-18b5-40d6-b0ba-1b59d18857e8.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 0x820fa8aa4b3121228584d1601ad83bc58689f6fbcec282be1465b9beb6871fc7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AUFFF1700156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e5b9db5682a39bd839d2183faaa1e8a210d4bed2a19f12355510ae2165759b. 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/AUFFF1700159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa0f99bebad6dd5f0d61c030a74422b813dfe7fd44b7cde9959b71d1762a453. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/AUFFF1700160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199e19c53fde2d2be79196ca008048b00022eb967added5b314739dd6d5ef435. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/AUFFF1700162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc209d83ee0f5a19b8a550c0f489ae1260e0eaa7a627a62711340aecbd7b8f13. 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/AUFFF1700163.
Album for the Young, Op. 39: No. 1, Morning Prayer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c1c00e04177fd699b3502d803e7494038a7adedb527584aaaf3413cba43dd3. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/AUFFF1700166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5f48c142caefd54ec27b2085fa9622da0a812ead32d6722e58576e27e2d2ffc. 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/JPPO01502385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f90ecfe395d64d3c2aa3f42e0591c3796ae4e408b52b60bdd619c2fcb9b2d3. 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/JPPO01502387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6ce5ef87a6fb6dc3dff8420d10c43b29cdd954a799ce0237ae6037cd80d182. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPPO01502390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cbdd8f346b95c7a140d6d61f6fe840cb4e0c4feac360467797cc9ec265938a. 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/JPPO01502401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10325e6946893336cf39846dfc650dcf38d02b17aac2fd3c96e8712c1b2283b0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPPO01502389.
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 0xf208fc8b466e99098f1c0a2076fa6a144a980db0e16b40dc15fca3ebd6b116c9. 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/SEAEJ9606020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be68c8e2412427cae49860b6ed0e0f225d6e6f6525841b9154c61786e80be51. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEAEJ9606070.
Machiboke (Waiting in Vain): Being Kept Waiting in Vain
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47eb9c72711e4955fb7c0354636bbbb86341727fc6f37c84c66779db39497346. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEAEJ9606080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dbf7f3a2f890fbaaa343c1917aeac23d50bcbf99b31462865882e30b173d377. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEAEJ9606100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01eba984ac24260e120f44940dcf0b7b4a271f32600e5f10f735985bd8dd473. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEAEJ9606120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa48e9bcd7c764f73222b22972a387e0c1ff91af1804f2204dd23db09fb198372. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SEAEJ9606180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b468b818d929d90d0def74d08f488955b3fcc1b80c37deda3ee04ac32370ada. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SEAEJ9606150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b490bf1cb12886605c9847f6b140337aed67f6857afdf26f5f8b3be8936820. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPVI09324320.
もしもハーモニカが吹けたなら・・・吹いてみたい名曲35
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f314c07b5edc0d78fa14a8646b4551b62827c7c93c2efab0fc2f5a199ef3f9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBAJU1701149.
Mitsukuri: 3 Pieces After the Flower / Hashimoto: 3 Piano Pieces
あなたへ 三縄みどりが歌う日本のこころ
Flowers: The Four Seasons with Japanese Songs
Nakada: Songs (World Premiere Recording)
The Four Seasons of Japan for Four Hands
Rintaro Akamatsu Piano Collection Vol.6 Pièces pour la Jeunesse こどものための小品集 2021
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0340f5836ba8023bb4f6241c193a47b9d69f050066666f2db9d0c58cbb84fcdd. 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/JPH492100050.
Yamanakabushi: Japanese Melodies, Vol. III
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7e449c72f9306e8a97efc877dd0e447ab3b280274f5fd3989b1731637190a3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USSM10010334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e272139e96f197a0dab3c27fb12cb89564d87c8410e88ed571487603472683c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USSM10012885.
9 pieces from ABRSM Piano Grade 3 2023 (2024)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5770b52fde7b90229d638afb94cb6543dbcfab14520c990157e0fe89782ad285. 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/QZTB72329146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087ddc515693c761a653bf217c2aba5bd6fb7e4ba39a4fa411154fb73b70f56e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB72329147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b66b8171b82000275c3e2894189f5d906173429869fed085db5dbcc624f9e07. 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/QZTB72329148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3e517d8dd8e86279a9d8c8e67dd0a058370a8f69981a3542fb0c63f93dcc20. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZTB72329149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af88dd50763b3175f8db56a4442eeab880c052b36e21e41f17598d5ac54417f. 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/QZTB72329150.
ABRSM Grade 3 Piano Exam Pieces 2023 & 2024
Elise in Wonderland - Piano Miniatures for Children
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a2354f5e37616210e7142dfdec654635ddbffc2683a7d12c8e0bd69ed39006. 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/DEB420701404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b56aa87983dd5b6439eac07adfed662dbb2066844e895c37b3d6a5d930f9cd0. 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/DEB420701800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698c5cde69102e8ed0dff52870ee79e40fd744eabf8cdac7cd1be845a5d1e574. 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/JPG201619452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e97192eb780b245e9784b817bb23efc58fee52f2a578477aa8966988b0ff589. 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/USL4Q2137303.
ベートーヴェンにこっつんこ～シンフォニック童謡２～
日本の合唱曲 三善 晃：嫁ぐ娘に / 中田喜直：美しい訣れの朝 / 清水 脩：月光とピエロ
100 Years of Japanese Song: Japanese Journey 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51795a28bb330b309cfc60634a93a83b262ef2375599c4d474b1d90c42c614c9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAJU2200284.
「私のふるさと」(日本の歌): 足立さつき（ソプラノ）