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 0xf8ab3c9cab362cb83c528410a98f2f39a08d1c75a350f1e36182e54ad4dbcf19. 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/cca305a1-ffed-4f35-9c8b-b04b4b21d2e3.json and https://artists.proofprofile.net/proofs/artist/cca305a1-ffed-4f35-9c8b-b04b4b21d2e3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ケロポンズ+藤本ともひこ 劇あそび大作戦
ケロポンズのたのしいうたあそび
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 0xab3965bd0148ae59797d91f64d4b423767e570057fe975d4f2af1f563bc75a31. 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/JPKI00817628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x402bcc21c4f9ba12bae7500d51d4603dcb30c1d3b071f72b09704a8bd1ed6ce3. 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/JPKI00817646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a95a4767ef465eb81b1620734ae168e8df5b37b5b897f252f36e7ead8704c2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/JPKI00817651.
ケロポンズのゆかいなうたあそび
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9989b875a5fd4396f69c846a1188d4de297fe2ddafd7d42920d9c5109c9627c. 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/JPKI00918683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a00e4a39bdce7a301b7fea8f1d469b9d54cd33cf4e2baba9614c10cfb64312. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:23:33Z), 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/JPKI00918689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c390f7a870ff0c3ea1c86afbc395b0eb8ab3a336633ef362925d826ef9da19d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPKI00918694.
Keropons Best Songbook: All-Time Favorite Songs
ケロポンズ+藤本ともひこ 手あそび大作戦!
ケロポンズ+藤本ともひこ ミュージックペープサート エビカニクス・ねこときどきらいおん
だ・る・ま・さんがおどった!～ケロポンズとりゅうぞうのあそびダンス～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01a14072d97d171b019222c214388e8db61c0fc88e5b43606fb52baa04d36ba4. 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/JPKI01514465.
ケロポンズとすかんぽの ケロッとすかっとあそびうた 〜ららら ハッピーデイ〜
Keropons & Sukampo's "Kerotto" "Sukatto" Play Songs: Lalala Happy Day
きんだーてれびオープニング 「おはようSUN!」
Ohayou Sun! (Opening Theme of Kinder TV)
ずいずいずっこけばし×サカサマックス ～ケロポンズとりゅうぞうのあそびダンス～
ケロポンズ & すかんぽのおいしい・まんぷくSONGS
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d67a15a7e4ce094100e73c164043eb92c1b0af6bfa7bfd3d3409f306774e20c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPCO01544880.
Keropons & Sukanpo's "Oishii" "Mampuku" Songs
【最新】エブリバディ おどろう！ ケロポンズ BEST
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b2bcc72071031dfb13d7652270ad8ba74160a891b1dd77f75ee527b0558078. 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/JPPO01902386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8837471b21e7771537519bdb834e95100065a64dc9a4cde791aba768abc9de2f. 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/JPPO01902392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcbc57cc935a6b3ac576735344508e1fbab8b4c2140cc1d95e7eeae009f53ee. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/JPPO01616063.
ケロポンズの 赤ちゃんあそぼ!～うたって にっこり♪あそんで すくすく～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa657b8bc90eb6671da5968f061b5e9c004f7acc735aab84272344840f86333d3. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/JPKI00817623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e09305c8bf9ae9da713da528431673b7b4db4663152ebb4f2555bb290526436. 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/JPKI02016304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fac17ad232225611bf6e6f14c82d7f8d2e943e5d600de7ee465f7f49bb6ad48. 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/JPPO02405573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f7fcf68a892013002f35e7c3f12baceb491b8ccb2dff753a64450d6c2f800d. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:23:25Z), 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/JPPO02405574.