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 0x4d8a63b5f34fcd643a6038ee825adc3aff886dbc24990f6202aeb59c0ac691c5. 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/86db0a67-21aa-4a85-92f1-7fe0250773b6.json and https://artists.proofprofile.net/proofs/artist/86db0a67-21aa-4a85-92f1-7fe0250773b6.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 0x220cfd438be3326d79fe44a3ded30d8ae2c543f7f47c2a27daf2ffc8be273ebe. 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/JPCO01438499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8bd68d04a295a77ff7e00a0d049ff0769d4f81550017360102d4fe1fff4a6d. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/JPCO01526070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cddb9a1be091f2dc1bca7348ddc9f2e8b388e525ceefdafd09a6f49ba70b24d. 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/JPCO01626790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652689e82815b2ac30475ceffd806884ea3f2a204271454798757d06cc3b1e2f. 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/JPCR01704320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4534b2062daac9562aefd47113a59db8893859e5c384377652058a724d783b. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/JPCR01805430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55defa3dd670710f4939a0d51384d6775fe9db8ae174f148d4467b86e069b6db. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/JPCR01805460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bcb34f96b5a742f51dec66b9bab8eb7b473784bfd0be87a196576d8c0821e5f. 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/JPCR01901540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87990094d0e98029d1b3412f0631af860fd9afd6f4c7358663364690549675eb. 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/JPKI01915930.
最後の彼女になりたかった/恋人失格/センチメンタルに刺された
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20c3a8148d79d73e45b493eab853378fb7b1e2a8053a5bb7f2550dae09d68c7. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/JPKI02012354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729f03d102c6fe419d2ad50b0f79fa717d83533e5a594f15701a0ad7bd3d98b9. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/JPKI02016694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b3c15ebf8325117ebc5bb46235c4a63bf5b8f1c65c10278217aaca035dde9d. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/JPKI02016689.
君の住む街の天気が都合のいい空でありますように
May the Sky Above You Be Clear Blue as You Wish
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583ed8ec824c684d19a74545534d3af762023d2fc35e138ac0eacd68ceba61a0. 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/JPCO02212640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955c34be6a5e49c3791b392fb56db6ddbad332c9bf578114fd7c5d96390a3046. 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/JPCO02300270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955c34be6a5e49c3791b392fb56db6ddbad332c9bf578114fd7c5d96390a3046. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/JPCO02300270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ed1c367be427c12ad6654e7abf9b974a7b9bc39db8038124ee686ad8001d6e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/JPCO02401410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aeb05a60000c5fcf414b1304cb982adecc87caed34b3ab4c71d5277e91949da. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/JPCO02323670.
あたしを選ばなかった君へ / SPARK!! / 浮気したらあかんで / 元彼女のみなさまへ / 君がおじいちゃんあたしがおばあちゃん / にゃんにゃんにゃん / ♡人生♡
To you who didn't choose me / SPARK!! / Don't Cheat! / Dear ex-girlfriends / You Be the Grandpa and I Be the Grandma / Meow Meow Meow / My Life
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa36af7f1032a2ec1eeacfdfc566ec80ea41b6f6042a9d8d2f0ad165caad877. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/JPCO02502670.
あたしを選んだ君とあたしを選ばなかった君へ
To the one who chose me and the one who did not choose me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c7fae03aeae0c8a1390810a7f255140663ba19c816f9228c3ac166dd47cabc. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/JPCO02500870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c6f090e6439baab269cdfba2fbdaa01eac2b31488ebc7a0e4b286cc060441d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/JPCO02500840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688c3733f283700aeefa00317618d4a528f5003611839669f651bf001fac5b08. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/JPCO02500860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669d25369badd2cb47faff67417ea69cad6b2d77082d931e82946dc94194fe94. 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/JPT591810056.