thumb|right|Kiyoshi Watatani (Japanese Novelist) Kiyoshi, (きよし or キヨシ), is a Japanese given name, also spelled Kyoshi. Possible meanings Kyōshi, a form of Japanese poetry Kyōshi, a Japanese honorific
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 0x511c688826404c26248c79dbb7180d6be02f790eaef094eb7ecab327210e2ba3. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/343b76d9-cfef-485d-9da4-70c4e57bae0b.json and https://artists.proofprofile.net/proofs/artist/343b76d9-cfef-485d-9da4-70c4e57bae0b.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 0x7363ff206c6976b56b562742f871361f6b38e7a1c567a8274c3c129b58eb0a9d. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZZ7U2426954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcdfa9b8dfdd3fd33839542a379762b8d39f3c87ad19fc337be8d2ba5f084b57. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:40:37Z), 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/QZZ7U2426956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x583f16d3143886bc8f9eba552c41b8d25581fd96b953dbd739d3886b89dcf0cd. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZZ7U2426957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c594efea2c25b02bfcdfefc4102dcec71269d506f827859d2256eaadc48a03f. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:56:19Z), 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/CA5KR1968996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ad68535f350c04fab447aacc61ebead5e83aaf074305da5b942dd76d2f12ce. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZK6N2013754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956e210cc3cda3a73adfd8b732055645ba62f48afbd9692cf8884336ec5fbb7e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZMEQ2271841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0cd2c7bee1b2117f7cfab8c2ed1b12052221563439c767a7ae57de2e6be5be. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:08:36Z), 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/QZNWU2203360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfe0cbda3b8b84cf255315c1530f0ade91cb3bd15b0926b2470fbc989c76152. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZPLS2216782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2da0890e47d1dcc952d5d7a9cb0f97ee214edb4a9c2692c3ae9d383c475aa92. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLW4L1800071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbca3a32c0aa1897da0219ef1f304bf58c0218845487399f95c0f3973b47995. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USA2P1835885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a7806cb74d4a74948f36468ae1f79b4ebdcfd73a5b3e04418c8b5070a7d9f0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TCAII2437037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdce506caa65c75ea93ad9752e48a0f23884fb31bc632ad69d96733c369db42. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USCGH1689575.
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 0x8c67463b73a48acb032b3a481ac03eca900f7e21f980299a0352be384352fcd6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBKQU2331195.