is a Japanese pop music band. D-51 is group consisting of two men, Yu and Yasu. They are signed under Pony Canyon label. According to its members, the name D-51 came from Japanese National Railways'
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 0xbcbe47ad6b9b1772a3ad4e0af493ddecabb51df7527de02aa4508f5f75982a92. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb4b867b-33f0-4370-803c-4b22151e52cb.json and https://artists.proofprofile.net/proofs/artist/cb4b867b-33f0-4370-803c-4b22151e52cb.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 0xf2e9a5f4481980f5b6735f975c74a68c283d57b8725c4fee035d511991d4a8c3. 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/JPPC00501742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98acf95517d3a70343b46cfad2bd3c4465751bd2077683cf729c360d09b39c3. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/JPPC00400479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3872ba496c06db1644c871eb32f88a1dd4a0bcd6b748f6f6a5b8c555ecdb2e1d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPPC00401586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x403576d6cf9114669c6426bfe277d3925ac1f8c8d22f0c56f76e904b80a37746. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/JPPC00601816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8733b750aa877ce24a569cd1404f1d2963454ba26571220fabeaf97d97b722ee. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/JPPC00600688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e64b63fd47f23a305e18149daa3505500df264fc426b3f5ec02db32a327b82. 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/JPK401400736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a50f8a61f1a2b81d00510c10646071a2cf86eb7c8e6c3c65911a58df78b43b. 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/JPK401400751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7de88f601fe015121750f0186dd8a40564a475684992a4e5614fc92ed9e99dd. 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/JPPC00401772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa341d1ad3e25d106b68f169243ab07907032e4e2852d56c4c9858444ed6e72ad. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPPC01000338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef438dde6c7e8b1a3b3f0d49687108fea00ad94be099b6b5bd9fcefebf31435. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPPC00802752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fecc589ba5f22093466ad7ff5109a0da5981a3d7f93dc0a1b0be624e581eeaf. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/JPK401800898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22291277350f05cf6c3e2009f5627e6b4a0cbe4ca6c3f066088b7f6722f5a88a. 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/TCJPB2406130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ca2d5fa1f8983fb52e2e541a0464deeaa30fbae2cb06459faba928be060ac8. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QT66J2574687.