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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e772a77809e7e7b5ce78c0feb48a21719b2733ca1c95f9fdfdea8cb81653c42. 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/809ecec3-9b37-4605-881f-4aa1395b1872.json and https://artists.proofprofile.net/proofs/artist/809ecec3-9b37-4605-881f-4aa1395b1872.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd6a447464953dbffcacb6a97e675ddd8ac9c73c896d7e35f3630c54c61a225. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:27:55Z), 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/JPBV09700784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a7c040b4ec8a4307a88ff732696b180d227b26f9f14b9419ed0161531b6981. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPKI09942870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31e82c6321854de7c16dc66e2e752b3c0113e4bca56be32b2c67826cf31e5f7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/JPKI09942840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83490c86d9ac1bfa5cfb3235ab21f68fd18f6fbebb213b5799bab4fc2779c7c3. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/JPKI09942910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf428fd47095c324b5eb54efa8a93a463fe3d507ed8c84f61d94e8dcc8814b8f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPKI00814292.
浮草の川/酔歌(ソーラン節入り)～シングルバージョン～
石狩哀歌/石狩挽歌 (スタジオライブバージョン)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9583b4f2605b3c0dba2c49e65b32dfc6973299015eede0f953e28f0d976fff. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/JPKI01711555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0db3d863adeaed8c6f8cd83be2fce708160bee6180ceec9b19006055f26ff6. 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/JPKI01717476.
いちから二人/道ならぬ恋/私のバラード
愛のワルツ/神さまのプレゼント/男船(LIVEバージョン)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde4245076da18155bccd9882a609eee72ef9636ecd290b006d178c355adbfb19. 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/JPBV09109240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa11c18f7f79334502644498309a066f4c85255fb85946c2699e453ba4dab4a8. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:17:36Z), 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/JPKI02115117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea506a7aa2906bc9055559ee530abe91d352b13b5009aa652f17de77c6bfcef. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/JPKI00506270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c52ff5032864b40631815acae288afdcbe33f71e5dd484f309421cc6f4e13b. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/JPKI01915073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67578be787331c4652113f8b7e8b482e63be2b6bc6b4096cfa253cdd1bd928b8. 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/JPKI01119032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14581ace14e66bd272c17dc0028f13d6f71a72955f897db83ffe250401a7be44. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:48:45Z), 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/JPKI00231448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093fc8e1ea25c699ac93717cb8b08f0ea18c4b8b0bc226516eb43a5fa46dee96. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/JPKI02410259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a8c7440a42748c196276f63c380c06c17897ba69e75c5bba4e0d0796a9e831. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/JPKI02511611.