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 0x7f4017ec23062b87544a1e15fee9d902b985ed89f4d6b83e885ea5446681f8e0. 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/1b6aecba-bbf5-496d-8033-55a362ca1eaf.json and https://artists.proofprofile.net/proofs/artist/1b6aecba-bbf5-496d-8033-55a362ca1eaf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
こんにちは ののちゃんです～ごあいさつ
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 0x0054b2cf0df36764bef0a770c6357feb67b1b5ec590186d65d44abde4dabc5fa. 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/JPKI02111563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c5ce29f51feff1a63679ae75226816b753cb69a845c083a8f397181b5cd284. 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/JPKI02111568.
大きくなったら なんになろう?～インタビュー
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc2ab77a807b2662072af5b9ff916cdc5559635409a4d90802f32f45d87029c. 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/JPKI02111571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6d3620b1a6e1ea3ec6589c743819627aeee4f6197cb2dcc4a1b4cb97ce31f0. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/JPKI02111572.
いぬのおまわりさん～第35回童謡こどもの歌コンクール〈ライブ録音〉
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec14d770acca4453cb938b2ff7a516b12cdbed65d002594adcd7748b4af24ed8. 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/JPKI02110816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e76104333d8dfa891ae5afc34c27d7eb714405a371693f0fb4188785c437f42. 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/JPKI02111573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e32342621ad4c510c6c1c941993e7c211c46f14f87a835fa0e896b7e16b477. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:03:49Z), 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/JPKI02117970.
ののちゃんとあそぼ♪たのしい手あそびうた
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f5cf7db7b9327a6092de9b2ee14b3a5facbc0b64c6cfc7eb7cc6fd16f43985. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/JPKI02211212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3762b57be0b9bdaa29f13a9dcca1154039f2415f19dc38b0128d2792b7f6f3c4. 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/JPKI02211214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf0029933342e4df2bde2159cd5d349678b18293886a8f1b66f3ac90f02d783. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:24:29Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPKI02211216.
ののちゃんと うたおう♪～こいのぼり
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3cabba1b240eb4d8573e798b60668d5006106439d71fbb900e3993f8c26a72. 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/JPKI02211839.
ののちゃんと うたおう♪～せんせいと おともだち
ののちゃんと うたおう♪～Happy Birthday To You(おたんじょうび おめでとう)
ののちゃんの 「むかーしむかし」昔ばなし～おおかみと しちひきのこやぎ～
ののちゃんと うたおう♪～たなばたさま～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8239f2fbc09cf448964fef6580ef603fcd7b383116837cf7aba673511ac4e5. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/JPKI02212819.
ののちゃん こどもうた～みかんの花咲く丘～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde842a5272e40e124d41bd4d8d444122195775f9df71bb54a06c8cf25b0ba8f5. 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/JPKI02213117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513d6f6204bf6dea93181ba6dde144a11cfaceb88701d2dac25a60470eed4123. 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/JPKI02213119.
ののちゃんと うたおう♪～ニャニュニョの てんきよほう
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103fc4e8401e78217761c7cd12e585ff8ba31aed5791a3068d89d7145dbbd4b1. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/JPKI02214000.
ののちゃんの 「むかーしむかし」昔ばなし～てぶくろ(ウクライナ民話)～
ののちゃんと うたおう♪～ジングルベル
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcac1368926cc576c40414ebaa88a8ecb2849b811a2214880d2549f76696c5cc. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/JPKI02215239.
ののちゃんと うたおう♪～おしょうがつ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3941ed29cfc2db97e50ab35791f6ed16d53733236de8c1777b8c88031b677887. 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/JPKI02215637.
ののちゃんと うたおう♪～うれしいひなまつり
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ff401260a2dac9f5b8d0a2fcda35bd4380b223b11616f9f80fcd04d6f3408f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:25:17Z), 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/JPKI02310727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e4ee5d1dcb2ac3e56138587f224386f0d0a0190eaa2c8068bb81f31f5abbeb. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/JPKI02211838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04344f715fe469a077253aa676827c9cef032d8bc09abc689b4d9a2b4406932. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/JPKI02211243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0d9b5ca07c768b46acffb376c3f994ea70849609fb413fb292faa75e0d4781. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/JPKI02310729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc403732526bc97f1b0d2f258d14b4f1f52947c018b98387a51ecc6455bbed6a. 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/JPCO02320720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30210c590fed3c950c9d9fc77b8878419a4dd134c270377a65072daa10d45e2. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPCO02320710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc403732526bc97f1b0d2f258d14b4f1f52947c018b98387a51ecc6455bbed6a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPCO02320720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30210c590fed3c950c9d9fc77b8878419a4dd134c270377a65072daa10d45e2. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/JPCO02320710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae2cd90c2b07aabe95f05720168a8e04fc9e3594b0a27ce3a4faca13f8bb851. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/JPCO02407680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f59fc2c05d3c292d95ebb4afd71d34f67e8ca3526da8a61990c68115ab58bee. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/JPCO02407710.
ののちゃん 一年生になったら～卒園おめでとうスペシャル～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00d9accad433bd5f1a3e6fb6fd994efec66f3a3db9f4b72dce47138ce5996b3. 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/JPKI02415553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf4d89dfdd503e3ecbc1c571738d325c304b5ac4e0c85ecdcf4dadb6f1ba8fa3. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/JPKI02415554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b245684044c49bf37f842d34da921b698d6b17d7343241e43370f1a43e03eb. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/JPKI02415555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767298cbefb32233a2f60e9f8792e5ca9babaca566a7905792f2e2b38baed9b9. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/JPKI02415556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8b4f9345aebabd4ce4d95d5d335ae1b16bf2f54e3d78b14605dacf74a6e4a9. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:57:39Z), 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/JPKI02415557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf911b0a92a19210893271cae48de8617918f11233ce9c48a0526cffe0178a9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/JPH492501033.
ののちゃん こどもうた ベストヒット ～昭和・平成のこどもヒットソング&ののちゃん音頭で元気にな～れ！～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda938fa923698aae642b8e5aeddf47bd2396f3fb96971b04e4eb0f7e1492007. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPH492401047.
毎日のあそび&季節のあそび～保育園・幼稚園・こども園で人気のあそびうた～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ceeb75f64d3d0c5bff2d749af0e9b51c3cc175189e4ccb5e1c08817f15db412. 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/JPKI02313545.