Otoko may refer to: Ōtoko River, New Zealand river Otoko, New Zealand, New Zealand settlement Otoko, Nigeria See also
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 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 0x489f43303807b7d9c0f2db720bd42bc9cbc0df195a88ce8a6fca3074091131fb. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7259e5c5-9f7d-471b-b152-6d92cad1033c.json and https://artists.proofprofile.net/proofs/artist/7259e5c5-9f7d-471b-b152-6d92cad1033c.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 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 0x893d60fc37333914cd75b9338eecbd2333188f447e8aae3718e7e644948ede7e. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GB4GW2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bd513f9694cc37b715fe008f2dc155e4b367333875d8743dba6cc4bc96745a. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/GB4GW2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8834bbf177be1087edaa832e23f9f21bbdb8a728e04c421e503064d2af19ea. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/GB4GW2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e06974eac105576225c2154fb9f7bf198579c0975602dbac67b6fc7b68f601f. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/GB4GW2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59fc307f65e48a6fbb8ead78cc1dbf51fde3d181d9b7576d47c4e76dec39052. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/GB4GW2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d57db7709f78e2385ed4c98fb28089053731d6c03c9ceecc412464d01241f4. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/GB4GW2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f376267c02b2bea8ec886cd44fef4118a2696637f376794151da934ca5c940. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GB4GW2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd2fb02a19c218633eaf861760ea6b9a5a94a43836221452a4e2bdc83b8fecf. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/GB4GW2000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec592c21fbcb6d0ade8d77447b3f30e60fe3509c4116c2d4e54502a465306158. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/GB4GW2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ab89bba545fdff55f8e598351f492f699241ac39e521bca38dc37d9d0aac3b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GB4GW2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e64f9a8f345c452a59b7c91c3e94becfebde84e86e5ab6fb4b27aa8ad2996d. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/GB4GW2000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5b785a1e1605f23223e2afff5b84f76094094fef4c9ed061de48c2c9b5a619. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GB4GW2000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c5f3458df9adce17cd7ac76e16ebd210f00adb3c0d8d9f8acdbaa507e0659e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/GB4GW2000024.