thumb|Scha Dara Parr live in 2011 (on the left in blue uniforms). , or SDP for short, is a three-member Japanese hip-hop group that formed in 1988 and debuted in 1990. History The group consists of t
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 0xa7d35e6946a7e5e0c6a703659fae34c6e6e4cb910562f4ea0f210d8240fa7378. 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/15820b4a-a28e-47e2-92b6-fbfe93b218e2.json and https://artists.proofprofile.net/proofs/artist/15820b4a-a28e-47e2-92b6-fbfe93b218e2.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 0x8e53a79783e2c0187274ddf657382dc16bc5f4058e06487a53d9a3262388d6c0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPPO02400877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb098707c57679c96948a222a4641e437b8602c0ea12a9f19b084c1eff7ad55. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPKS09400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935953203ccfd50526e180f3b2edd9ba698f9c4e02771e87743ab15e79313567. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPKS09400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9d88dfb9a7649a5b1e052f1749883f8e38da17049ce31f1d395cb46ffce8b6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/JPKS09400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84cd4fc3f42640bdaca5e135034ccce5e1181a53793d60c2365396dcf77f799a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPKS09400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79cab05f9ec6bbbc29e3bed8810a2b1fad3daf62eb2b896fc9d98282cebe7ed. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPKS09400008.
ビジネスはパーフェクト (feat. スチャダラパー)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dab17991d6e86a6ff4c42cf3a36e52c7a5d73bcb3e8d5e4be4d9c32f67304c2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPWP01901310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b8821efb3148c9a0c87bb16cf3f974b471e589be5f6c752e3060cb1ea1d810. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/JPJ902103560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac4acd08ec9e9516cbe85563697e9bcab872520365a2c3c6b99a4418376c0688. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/JPJ902103580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a157827ee0b3393eb70de707f4bbd51d16f194508a22c1c5a819f1d7b9b977. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPB600829601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f4e964ffdfd7878dbc13915650a6ea88f4f34e4d8e976f42a4f35e8ea22769. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPB600835401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08dba7f81ee25132229715276e88e3d3632152ae68595c80c41866e967bbc19. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/JPB600874301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5e78dc4b66bd41b5d5cc10ed7ee34c31a8dc9b6600c5a842fde06809e1bf9f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/JPB601003001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753d2f3e080fd986681e528b75d286803b31c62405c58260afe2e42d4991dcc6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPPO02403269.
ポテン・ヒッツ〜シングル・コレクション
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde137ded8acac15b7bd478a17334e6584788768ce293314a46747279de96640c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPES09104140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36bfa714213963e9ba4593e844cd7564f5290901d1b590e9d0c248381a13a7c. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/JPES09161829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9feb5419ecae04f2d7923692515eb89f281c993942278f806b761f179c5c2dc. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPES09161839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe752904e0b4111586fad07831e4f277389f71a5e93773ffd44ec5c8f3bdfc693. Chain 2 (Bitcoin): anchored in block 959138 (2026-07-22T17:03:03Z), 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/JPKS09400192.
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 0x666fde30290030f9cb7b304c344e1e7b3146fa3eb2540fd70654fc26ef2c5cea. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/JPES09107190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95bec53fe5faa8f672c2f59b6a360f7c60f08e2b96ca77ad4adf93f247f8e369. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/JPES09201570.