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 0xfe42ee5eb1eed8ab6274c14b6c0cb5314c3dee0adedd5c38c72d0d67dfb7abda. 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/8abbddeb-e870-40f2-b08e-7da54390936b.json and https://artists.proofprofile.net/proofs/artist/8abbddeb-e870-40f2-b08e-7da54390936b.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 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 0x2449687480ac119690a4568c42ec5ad3972748182c78761015b3ef90441803a4. 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/JPPSO9604430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ebff19f0062cea09190b24b3bfaf69669604abd85688bbf2addf253f5ba507. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/JPPSO9700300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64456930dbdc9acc6eecd104f33d4774cd92f385b5924a3374f777a317ca747a. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/JPPSO9700019.
恋人が待っている/ヘイ･ヘイ･ベイビー･ポップ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4826499573fe78858ba61bf2b653a805045766109ded67e27067f8553289fd. 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/JPPSO9800150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2721c8f1bd35dd30905634e791151185f9a3760155a6adf1d11b7944fb15190e. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/JPPSO9800180.
Queen Sound Babbles Again / Johnny Johnny
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186c1765d25a709222c4d8741e79182e8834ba902ed6733d7b8bc165743259f0. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/JPPSO9900430.
From Cafe Scandinavia With Love for cafe apress-midi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9998849cd44b37a93e2f6510b071bfa165a55d5245c2b83e2d2d4579ff739f. 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/JPJ901604870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892ad4e9ad0db19dd1728dab9043113d122afe5467ef42b415b4f72cc534cb26. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/JPJ901808400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913d16236871b208c22a100c8aa409f00ee669970320f6218bd036c08f241f9e. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/JPJ902103400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700b09d6bee43e0ae5dddd625c5b0abc8cfa9bbdddf00f4fe8893e1fd02384ef. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/JPJ902304630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ca91545ddd59980e27b73646b54b56dc3db1d16c66bf511d4d7ee9a4f737be. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/JPJ902109420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913d16236871b208c22a100c8aa409f00ee669970320f6218bd036c08f241f9e. 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/JPJ902103400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b132b656ec31d62a36ee4198dd579803be28e85f863570e766f7e846e47dc78. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/TCJPI2574365.
男と女 ～野宮真貴、フレンチ渋谷系を歌う。
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02d58f8778d96212608b99704c9f6098fb6fccf0b26ac53fff9dd569b447d19. 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/JPZ921609346.
ラテンでレッツ・ラブまたは1990サマー・ビューティー計画
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f975ef1ce46b1ca38a5b5caf2fb8b15a0490f2caaa6a544ad3e1ec5b58945a1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/JPZ921811951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e71d7ac1f5ab4407f23e31bdb6cff734dce81f642ce467c1d23b38e8e7978c. 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/JPZ921811954.
Swing, Swing, Swing!〔Word Boy Word Girl Mix〕
Transonic Recordings（Akira Mizumoto & Kazunao Nagata）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf8da0f7e1c1a8ef5bf6929825ba4079cd2b7d234402e45ba1065675856aef51. 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/JPVI00134210.
世界は愛を求めてる。 What The World Needs Now Is Love ～野宮真貴、渋谷系を歌う。～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0893d43f1165e42080c22467a5283d2f9cd00580420cf6e2f673cad617adca5. Chain 2 (Bitcoin): anchored in block 960285 (2026-07-30T17:26:40Z), 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/JPZ921512602.