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 0x69b383d05da92851f7558292501317aa4b6f26e2d9556eef7fa4a5857ac0e18e. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ecbc3bdb-664b-48ef-a864-593c15ccea8f.json and https://artists.proofprofile.net/proofs/artist/ecbc3bdb-664b-48ef-a864-593c15ccea8f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
保育&こどものあそびソング～女性&キッズキーで歌いながらあそぼ!～
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 0xa43f622fe90497b622450d8ee5dfa1b636acb1f15d7b9b25e5441d25b396c809. 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/JPKI02214794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0185ab79a954253e49f2d49e420036acab9ad9a1bb801ded97c040d4f50985ad. 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/JPKI02214877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7522eb588bc0b62a8908984d4d74e94e014d21e7830ec78eab04ce67773c87c3. 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/JPKI02214873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc7cab9ece88b67eecf37b21d78f11d91af023681c735d23c4934708cec3176. 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/JPKI02215070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26104c344a54c33519e3ffe18a6714d7885c768360585c794c33702539183db. 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/JPKI02214784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2494b3817ed7a5647a6a6c67cada9762570a2bab12506cf54e960426da16a3a. 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/JPKI02016312.
保育園・幼稚園・こども園で人気の おはなしあそび シアター・ソング
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4097532b039e620b407e83e28779a1706ec4c2c4949c72abb228d1533a93062. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/JPKI02312792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7522eb588bc0b62a8908984d4d74e94e014d21e7830ec78eab04ce67773c87c3. 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/JPKI02214873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e768f10536a7e023ffc328b8097d3b6158e06f07b6526ae495bff6f18809a2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/JPKI02312328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2348032e6fd143eaf81ed037b34138b0a5082b37e14ca26a43ec97b3b23d2aa. 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/JPKI01815720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1671985e32f4d210dd68abb6b006858d0b69752dd9b5934032333514e77e0285. 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/JPKI02312794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096fafcd74ccf7072618b0f1f3108810da24044e6b6b3110755b7391d6c10b44. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/JPKI02011979.
おべんとバス～セリフぬきバージョン～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473f12a27ecc65432090889725639c80a912c326f344774e63b90917ba41b041. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/JPKI02312795.
あ・い・う・え・おにぎり～セリフぬきバージョン～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0077bc3497ca0731575259924e20968fff009ba47669b1e164c1effaf3ec0c23. 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/JPKI02312798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ecb888bfa1043969b1774a9e716a31c97bf935bc4c0b0e5e7590d75a6ed03a7. 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/JPKI00175160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dab653cefeb202b918626fbf888582e130f2d9a3de8fbf4b07ec83c92f9fc4. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/JPKI00506966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ed8fea578e2e3cec3b91c1f65f74958dff6f8b7c4491549bfa349d241bb766. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPKI02312861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c1a7439471102499e1f06709469dbc91cc394b4518ca4e2f7d8d7d9b9d811a. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/JPKI02312797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafad1d97ebd9b33c98c95241a18708b6fed9be6bf2aa1e5ebac97c5f7e689d3d. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/JPKI02312521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a3495ec34b70da95e0a9c9eb83edc703f985f90cc676a51b18dfbfd543daf2. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPKI01811155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0924c0218df9418f3786bf61d2e20c570bba16e504b16c83efb646b6b77783. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/JPKI02216026.