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 0xaffd89612e4625cf200b6fc0636b6587ca24f8a42969e3e357811765a1f706a7. 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/23cf8439-3bff-4097-8a5d-04e58f6ca0b3.json and https://artists.proofprofile.net/proofs/artist/23cf8439-3bff-4097-8a5d-04e58f6ca0b3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
GOLDEN☆BEST 杉 良太郎 1975-1989 ヒット＆カバーコレクション
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 0xd693ce23bd9a073686015f9bbb6fa0a4b6d3c825775fdc50e339152f85f1b1e7. 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/JPSR07711010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdb9a38262ff1cb315297112ad7a93486fc6a44132be52244817c9230a93636. 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/JPSR07928490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8041f69da5d2ff222b49d62552dd9ecd91f5825a8b6bbdd0b4a16247bd890e57. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/JPSR08102900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78708bc20fb0f37a085818920ce5e2f9fac7109431db13c4b4ef3bd9d2a02d10. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPSR08104970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510f870356f7f170bcc6595c89f0274834e7538f04e26df33ce63f71ba632349. 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/JPSR07611650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ae1a0a645b1b2cd054422518739d247721beeebfd98ac7fd769b59a638809e. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/JPSR08220810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3f752bfb499403fbe43e6251af2fe2c31b2296595c5b9d1238f602f9c0fe5e. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/JPSR08527710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852225dc21d18cf0e1754fe3ab3913cc919e341e8405bcfe685261e5bdc72e97. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/JPSR07800840.
エッセンシャル・ベスト 杉 良太郎
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a8f52da3cdf2ea0791b81dbe9bc2963e7e9e92149b2d4a1cf7547b646bd0a5. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/JPTE00803350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0eadb5ac9d9498241e2c16d67cd2c88d9fdfb4076f1490b3f1600061a62a9b6. 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/JPTE00202770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373fa80de2f0f75d346c688e6caedce15ffb52b253f71e71f9e8d662ecf86270. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPTE00708520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aec51a56b917d4339f6c15b7aea5022a9216c623613cbd0a36fd091665536da. Chain 2 (Bitcoin): anchored in block 957702 (2026-07-12T12:25:41Z), 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/JPTE02307220.