Dream5 was a Japanese co-ed group that was active from 2009 to 2016. Summary In March 2009, over 1,500 singers auditioned on the Japanese TV show "Tensai-TVkun-MAX(NHK)" to become members of a new po
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 0xabd5396def35f6ec5bb90aca8c0a26ace3df4e5b9e78edbe617cf7cac4536373. 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/d62a5349-d3eb-4308-bc76-d0493f9c6c80.json and https://artists.proofprofile.net/proofs/artist/d62a5349-d3eb-4308-bc76-d0493f9c6c80.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 0xd567994342751278788f1bde622860133fc6ea3acf6c304fb20a66bfc045aa59. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/JPB601004801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43c1ebbd7a2f49b4a026cbccb4be9a25e79060f00529b76e89851446cdbc54a. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/JPB601042801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41ee4551dcadf61d721bcee618fe19e74dca5815eb90248298abde52fe61c22. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/JPB601070501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1126731f423962e03726215f35893ed1ee8d9f1fd5b8ef8612be1b5ae70998b0. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/JPB601122102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447873993b8a87a9f950df99db91b0b83709a6ee917400fcd7916eb6bd3106b3. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPB601167503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c24139f748ac96f45bc805affac08e09cc34feb4cb02f0016852e0dd3ed0aa. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/JPB601247103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x447fa4b63edbde1094f18f9963284059286f17a1a5f004b326b2a258741ab8a2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/JPB601302172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17d280445fcbfef46c1545d6655c2f62eb8f890cdcc3b0ac747d2521cee4352. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/JPB601300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec2e9d9bd4bda030137bf390e336e3fe5b0309d83001dfc1e0736f44097fd5b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/JPB601216102.
ようかい体操第一 (アニメバージョン)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9186e53e6386dcf9c8399e7ab88489c0e1348bafef60cb0a9e820c5a523e8a71. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/JPB601401310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165a359b5656a202d255035e38b82c303e4a88a13863f9e37585f5de751271c5. 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/JPB601402412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f948fcb288a8bad87b04c7ecd9cc59ec17187abdcd80237a6df829c70696f6c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/JPB600955501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43c1ebbd7a2f49b4a026cbccb4be9a25e79060f00529b76e89851446cdbc54a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/JPB601042801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41ee4551dcadf61d721bcee618fe19e74dca5815eb90248298abde52fe61c22. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPB601070501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37c0a16f2a2f6ae84fcbae3dc7ef4faa7403e824e5273c1f0757b20e951bedd. 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/JPB601501953.
ようかい体操第一 - SUPER OMOTENASHI BEATS vol.1 ver
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799c8c0bc7b0e54df54d72da26e8fca88c9ade39c1b243c51742beaa4c93053a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/JPB601902981.