Ishida (written: lit. "stone ricefield") is a Japanese surname. The name is sometimes romanized as Isida. Notable people with the surname include: , Japanese voice actor , actress and singer , Japan
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 0x43000dddb5915d33a71efc09bc0c21fe3f372de70a82306f30ced46e11778e95. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9ac7498-2b4d-464e-ba2e-60554cb7788b.json and https://artists.proofprofile.net/proofs/artist/a9ac7498-2b4d-464e-ba2e-60554cb7788b.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 0xce2d648d5370b9a721cf5782ba96d46f12fdefcbe32bc5ab69844dbee1c5f4e3. 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/QZTRX2325025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2607a5e4957447a80c9e84dc766e10cfe0f03e172949a5a7ff04f7ed5c12b50e. 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/QZWDD2448700.
Mais Forte (Sakura vs Jo) - slowed - Bonus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5149f442694e5f69e7b642370f95c4a855e3b5bd7cfe50b7faa8ebd53ae82c5. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZWDD2487258.
Mais Forte (Sakura vs Jo) - sped up - Bonus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2233048145f33cc561f51c6ae50b4c3fe5968b55bf40ba68ffb61e34fbd137. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWDD2487266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70c5e72fbb566cc4db1dd703d2f9045f788d721bd99823e6d9e488548062d114. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWV32433744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc700ab8cd46034e81107d0d61ccdfdf3cf5299e904ae3cb134a34b82f597216. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWV32433745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a170a66d83bddd7c86b596aaf101f082e04387355aa5727eb9895dc315ce7d. 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/QZWV32476206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32571c857aed4a8b8f4b8ddd4b6b307b36abb5647aaa7ebb8ed519dc264a3e53. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZWV32476208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbf4ba84257a912b501ae09e88e2b7736cd79dc5aae585045f66d688feb2987. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZZ8B2412249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc146198c573ffb79fd74fd4e2ba7dfde87e112620d439b5d42234a553336b0b2. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:48:22Z), 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/QZZ8B2412251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff71a997f22ea4e05aba7909cf49b3c36bc572f666c789fe9397410a996ba160. Chain 2 (Bitcoin): anchored in block 957591 (2026-07-11T17:21:30Z), 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/QZZEC2469376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cf735840ea9fa60c7c59ab5d0e7f7dc3c7381092b764a65e23caa3abd1d82d. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZWV32528062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe511d347d41a69741f0917f41f968f1a38ab694030583ed51c3a87fe78730d89. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:08:43Z), 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/QZWV32528064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64bd42e5c9dde7fe3549ba59230f85d1622f245d28a414cb09010b96a17676d. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZZ8A2531950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6913bdd8e0cd1f27833f8a520bb0d62460a404b110169eb6b6f607f8202e3fc2. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZNJY2006345.