was a samurai of African origin who served Oda Nobunaga between 1581 and 1582, during the Sengoku period, until Nobunaga's death. According to historical accounts, Yasuke first arrived in Japan in 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 0x3a1c3459620cd3f4488c92b569328bca803bc2939ccf3ced5c07ddcb410ee770. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d02bf0e5-99b8-4ee7-8987-2555be19b3ec.json and https://artists.proofprofile.net/proofs/artist/d02bf0e5-99b8-4ee7-8987-2555be19b3ec.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 0x4da6b1512402dd2f80731aaacd1a06852c196b554af273b6a4156ceb88b9a4f6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTBB2248942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a180cc5634f875ec2cf062b35070113d963c2ef77fe3f264cc530ec8e9cd02a. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/QZTBB2248943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb0cc90161bf5960ef794d79a17b6997129a96c3f36ac4f7e26c8e436621e87. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZK6J2373236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c778169fb6f197c21df6980b34b7c7acb90f7f12d55f0ef9146739d750e349. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:30:42Z), 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/QZES72529610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a74359779593a04ed055fbec6cf322adb5bc04c2fe80d40034452306015418. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZMER2573225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed253b25e1a5c0ddffab4c9b9c1e281da82715fd784fca8d5c7bcd4373b60dc. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/QZMER2573226.