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 0x078e940bf143679069b8937888dc1424c1d031b6001de5e92c8c54ae0283d987. 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/efb77fd5-6436-45a7-a22f-4b3d038d539d.json and https://artists.proofprofile.net/proofs/artist/efb77fd5-6436-45a7-a22f-4b3d038d539d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
増位山太志郎 演歌ごころ旅ごころ ～五木恋しや～
増位山太志郎 男と女の未練唄を歌う
増位山太志郎 男と女の涙唄を歌う
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 0x19d54ec60f9f6d6399f4eee5f6f426a570ae5eec225a76c958f55d9f518d7a37. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/JPTE01203130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0449d97234a6914c4d26fece5aec1685893530c25658348d7ac511743e0e9991. 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/JPTE01203140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32be3c284e43538a3fe16e059bb1a632abe6076b184eccdd41fa12596c3b3c08. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/JPTE01604640.
そんな夕子にほれました/そんな女のひとりごと/男の背中
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1af71ea831e65b605b024dc30619ac1fe3f272c288ea478b94201caea9a59f. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/JPTE07781900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5610bb5852c8df2295dc8d35f89952286c236500bfffbd5a686dc95e06a99d2e. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/JPTE08105320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7b2b7d5684f2d6ebc5d379152066389faf286574e031dc3a5f7220b7a4e6e9. 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/JPTE01807420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e88050248b1902e9656972ad5c937735fea30273da439496c14066c3e0e9da. 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/JPTE01903160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41c34295fed2fb6379ae29c47b39b4d085fdb5f28a6d4f981173d55b05bc021. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/JPTE01909220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba74b9024814231e9f53ec32753c1e52e287ec61fcc83e8c3d73236af0843f22. 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/JPTE08410830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf0bf82aa10f3a3e83e9147d6f8283629229db70c29f13a7ef4c42cab3ea2f3. 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/JPTE01807410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c235fdfd4ca8a2669d7e1feb40a01aa6841280855f5743245f932b980d89ab8. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/JPTE08512020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb058409d741490620fe626c29d02b5f2fb5abdc9db09b943cdb7c100c4f434fb. 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/JPTE08308080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe3ae1fef645d9c5edca73dd31afbbf1e76e174dfdc0c546b655b19edfcf01e. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/JPTE01210910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f4147d952c1c20ead59275611181cb23fd4e2ab90b7e5e4971453cc69d975a. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/JPTE01403640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a289f2f88b74ad8a1f1d6d1307ced3f97ef107a6698bb27ea5142666630144. 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/JPTE08410850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3358c33b67d7edde6b60c02ce59ce2e0cf60b675d19091bb80c0f9f9fb0239. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/JPTE08308100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2008fce12209b8022c7b008fc02ae7d1a36ea4778f967f250f0adf1630ea4a. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/JPTE07903770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50732baf9248cfe129b8b16cf45be3ac41ecb41b94bea95796da3de94690415. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/JPTE01909210.