Indigo Jam Unit (stylised as indigo jam unit) was a Japanese jazz band formed in Osaka, Japan in 2005. Members Yoshichika Tarue , born July 9, 1974 - piano Katsuhiko Sasai , born December 6, 1976 -
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 0x2647085246f0299ce38af5590006c24a8deba0d028d51521dbe94273c333ab49. 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/4893720c-4133-4b2c-a7b1-f225efe4b7a6.json and https://artists.proofprofile.net/proofs/artist/4893720c-4133-4b2c-a7b1-f225efe4b7a6.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 0xd5e09e895b03702ceb92e1606bcc364461b4a240237d5ffc4b7ef424baeae299. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPR501822662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b4b2b8fdc0eb7d0f0d907377a3704847d98be9ca25c0cc29bf6359216ae2d3. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/JPR501822677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1d9e9ec88e4385ec36582711218ab09b9d8e8f07788001cc1af96b9bef64ad. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/JPR501822681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x761dd3d111981f730128c4c9a54f8ca2cb8977a3974f4e0c382dca92053857d2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPR501822687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeac26f62b5f0f90314c5b1ab5bf7d182500b712ac07a367fe973c8af8719e3d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/JPR501822689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe516d3ee42708bb127fc113863a998eb273fe2487d6443569f49e3c34f8f51c. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/JPR501822691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767b124f423f5b96debd0963c9b3d9720a4b3c0ce3af2b5c69715e49f04182fb. 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/JPR501822716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae25593ee2ec51c46b96448f1d43733854497b1d26180ff968c8d6d8ea547406. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/JPR501822737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee3613e31bf507ce9669039b8cf70b039454713cd33e815b00154776cd6ed52. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/JPR501822738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5444400f91230bf39e75fd2eca0e6d9905a33aeb1e10197eb735ff4d7a6a1b1. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/JPR501822744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3d70cd8e1cf7a1b5e60d5dc33ed54d91d4c1d0e6ebcb2438416314b1173450. 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/DEEQ71809712.