was originally the area around today's Sakurai City in Nara Prefecture of Japan, which became Yamato Province and by extension a name for the whole of Japan. Yamato is also the dynastic name of the
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 0x08d2a91cb613666d88d7726fac77c1b8cdbf3c8db3c5ef0a5120bd02fd3a4426. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/528beff5-2a9f-4dc3-9983-da8266876f3c.json and https://artists.proofprofile.net/proofs/artist/528beff5-2a9f-4dc3-9983-da8266876f3c.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 0x85aac083f9b74d766cd8b246f62e0fef7c4474028d25a21cfdae86513927f6b7. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:49:26Z), 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/JPB601703741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c36bbb79dc99207f0519d3645c6da993ab0c73d72e8a2f323928a57ccbe4a4f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/JPB602200002.
ZEN VIP (Official Washington Wizards 2022-23 City Edition Intro Song)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303453499d4fc005359ae5fc3c8d4cac41001219935210854629c842f33b902f. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:38:44Z), 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/JPB602300338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e362e1aab73dfb60602a8390f0f5d3b57d80e0f11550a0d405ec5e305f9238. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/JPB602301475.