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 0x14d3036cd3fa7c5dd49b4ab0c65a0e64aacb04ce3e865471f4f3d7f374e0cace. 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/254f1791-e104-4fa9-942a-455c681d6f3f.json and https://artists.proofprofile.net/proofs/artist/254f1791-e104-4fa9-942a-455c681d6f3f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
ゆめにっき サウンドトラック ゆめのおと 1
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 0x6850c93257fdad3fb7576bf633391a5c3c35c7ddfc98a3ee14d227278960734a. 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/JPZ921406032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2279d025371b50344fce17dba59bd38d8ed0ca150976ad9c6312efb34ea97eb5. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/JPZ921406037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4813a5aa9cbe58070a1c4c8ec02cfbe5ac2d38da9a506347b66f153e6c07c2d2. 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/JPZ921406039.
Yumenikki Sound Tracks, Vol. 1: Yu Me No Oto
ゆめにっき サウンドトラック ゆめのおと 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170534b1229fceb9b9d12a213789cca6c4b6f642f272b90a1b0b011eecdcc3f1. 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/JPZ921409388.
みずにうかぶ つき〜水たまりの世界〜
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2443f367056910d0cb851f7e0d999d435c3a9f49b0dd97e6f729fa425ea05db6. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/JPZ921409397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60987bf67125b99b0b8561811f327337a93c9636a69e95a4c2ecca7e5a6ad68. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/JPZ921409400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58a5688fd266f1f150bb7ed8e543a37da89cafc9af220656d62aa8a84b017c7. 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/JPZ921409401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38fd285818ba6e0785a11a7adf46c06e6c08931506af9a3ebd1ae59f799b5fff. 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/JPZ921409402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac8655b05d16105225a6c77108e17da31972ecdc171981a48998d3634f8e349. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/JPZ921409403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0acca1bbfa4973e3bc77ee9827c25c18b3882da1268406f259c28e3c558fcf9. 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/JPZ921409404.
どうくつ〜しらべるまえはセーブして〜
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ac4674a73bad846813eb0a83a0049387524b6a255f6fb56d818f3d3cc044a7. 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/JPZ921409405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c7c1b9e25f47d96989193b30e7bdbbd4acde8819c4e4cd116e02c337d4f0ed. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/JPZ921409413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8795c73f6a93af19c67cdf08b694b7d1e5b45c25977cb720edb12eda6fb882. 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/JPZ921409415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a62c719cb40e626818f402c1fd8f33d6baa193c4063a8a0cdc04ba6ab4ada96. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/JPZ921409419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887897494b9fddcff206cfaa20a7818bd8fd4d21f000b1e805b1e671fdbf0960. 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/JPZ921409420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe230850f4f8fee5debb1ca7e894c10730ac1036ce12b5bf38e65da35bc5d9181. Chain 2 (Bitcoin): anchored in block 957822 (2026-07-13T08:02:12Z), 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/JPZ921409429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64ddd886c31ada935a52db80317106faa7424598d9a5c96cc934560b2850ae7. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/JPZ921406021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400aefc331174d69c0655e02cf57cc45aa63180bed1bffdfaed30a447648debb. 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/JPZ921406022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb231796640dd27dd531ed45ad2b796520b5d0878316beb6b45cfefa326a50cb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/JPZ921406028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362345550adcd6e3fbb80c3cd1d808ef230016c5030a438f247da13da0cd1c18. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/JPZ921406029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0258678babf576350c714de5bfa279fca3620b1e27dfb63bc804ee2f68bcb34. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/JPZ921406030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6850c93257fdad3fb7576bf633391a5c3c35c7ddfc98a3ee14d227278960734a. 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/JPZ921406032.
うすぐらいみどり、あざやかなあか
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8390f3154fc24eec7ce01a16d052048f477263a56d33d6b2968c0483705ab68f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/JPZ921406033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafac8dd3f3c0bd582db87cc1c76322b37722b869751986336db236c074fbb1a4. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/JPZ921406036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2279d025371b50344fce17dba59bd38d8ed0ca150976ad9c6312efb34ea97eb5. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/JPZ921406037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ce069b0212a37f82b3ec72f51326f00f0ae1046f4a0056b49a45d875e9abb0. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/JPZ921406038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4813a5aa9cbe58070a1c4c8ec02cfbe5ac2d38da9a506347b66f153e6c07c2d2. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/JPZ921406039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ae04f16005e4b20c7c9b27f3259a688a7c98a1f4fdc8bab18e8e91a6a15e54. 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/JPZ921406040.