Yamashita (written: lit. "under the mountain") is the 29th most common Japanese surname. Notable people with the surname include: Akihiko Yamashita (born 1966), Japanese animator Ayaka Yamashita (di
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 0x71ee8cddae1c7036e1d9ee054628f82f372a659693f8ceb57cf8a7ec1f54edef. 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/e1e62dd8-4801-48a6-9912-4dfbf8e2158f.json and https://artists.proofprofile.net/proofs/artist/e1e62dd8-4801-48a6-9912-4dfbf8e2158f.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 0x0c5bc236c4c32257fbc166d04a22c18924bf15176a23103a43ca2fbc678d998d. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:55:18Z), 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/QZHZ31998724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1d1f896eba1fdab9854028b470e26cec66d8d3eda66cc547ed26d66b3b3151. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZHZ61907383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b06f83c506655bb63a6b6cacc8bbae37a97d8202fc094ed47311a3c97154649. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHZ42050681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d675e63656b8b7463daf7ec7f77782a45ea862d4321e1ca42a8bf0060bb560. 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/BCVUY2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8985fb01e637ad9f0882d9123d736ed463fef3bbfe3607dcbce749daf5a89746. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BCVUY2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfbc5117c869d8d9d8807f6f2defc0c90123253304d6c5af337c5fda092b4b8f. 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/BCVUY2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573c4edafecc24b506126bc33129ff350b195a76ab0330f564f0df3e75a860bf. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BCVUY2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d440f298ede4823d52d0fffb63c049ad34fdc24fbe8d5eeaf84c70400a3cd3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/BCVUY2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8c1996ac5a82646ba115938393a50c119fe80d110b3da6b6ee68184add95e9. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/BCVUY2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01d960af0a6b04e7350741ed7ce4c00808d02a8f94d2f17ab1f623283c27a38. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/BCVUY2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96312ebd13e83bfcc69f8a4bf3cd4cd838c1f74ce0989ccee041f289ff11a28f. 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/BXIV82192737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9613db4ce7ad2ed8e183b09612ed565f6698d734adbbab9ba2709eabc0c4e850. 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/BCVUY2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a3c623023e2deb81f9a55c657bec41a09fcf65ca38f626e2f597d05be77f8b. 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/BCVUY2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf5e1215e4b27b96fb06d7cfa212d9dc4194159c9d73ea1cf75f24640a92b7c. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/BXIV82101257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf133bfd1dccb2b49ebe0ef55f79969923dd3dc4bb26131d2f805961e99833eeb. 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/BXIV82137514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125015f1d95e678f1702c06049ddb8a38433a4ca0076fc473b115394f96d4560. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNJV2009340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203fd41bdd9c24ed129cac49c50936bdcd50efd1a5aa3288f29ae70d7cca196d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BCVUY2100007.