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 0x5c59f9dc1b1f4f358484fcdb8ef8fe3766b44c6d870df97accd09466d1966bba. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1d34a62-5e95-4665-9858-c5c696c497e4.json and https://artists.proofprofile.net/proofs/artist/d1d34a62-5e95-4665-9858-c5c696c497e4.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 0xc5acefd8c4e4ec018d1647a41e17dd446067b3aec5b81ce5ff3d449a9cd06a20. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/JPY201304017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d14f92652f158b554272efefa8c44e295290012be2d6f1f73870754120859e. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/JPY201304022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8395d516dc2f61ea331dd2f28a8ca784594a17a6947fab1f7cfd5c6203179198. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/JPY201002368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca24ae68f918f4ffc5e732a8ce134c5ce382cff850a8daf8be59732d4acfcc28. 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/JPY201002317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7d2e06a1934f1bc8553b484baa825c5383791f4df406fdce217741e6837b69. 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/JPY201002469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3190e874f48cbbb5aef9689ef2afa02114bf1fd496d5ed5f5a6128973a12758c. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/JPY201002460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08557de55982d895301d3b0ba7e16d1dc658591939ed43ee2cd15ecb46af48d7. 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/JPY201002505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9fa70e4708c38e90d08ddda29ceb01391266f54299f6cffed3c3be24b00ba8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/JPY201103051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6df7d0b8002b54daed18f0aabc644a1dbb8e698d51145493b06f45c0f26bda1. 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/JPY201203398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3493348ed6271862c4852a10d9394583c48e7813792d104d0ca2d03813d0f822. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/JPY201405214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351e24dba0dd82fc14a04ea7e63cc037c6e4af3fd06571e2c8521b69c0e1fd33. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/JPY201505671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9fa70e4708c38e90d08ddda29ceb01391266f54299f6cffed3c3be24b00ba8. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/JPY201103051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08557de55982d895301d3b0ba7e16d1dc658591939ed43ee2cd15ecb46af48d7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPY201002505.
Sakurano Hana ~Mother~ (feat. GAYA-K & Licana)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6df7d0b8002b54daed18f0aabc644a1dbb8e698d51145493b06f45c0f26bda1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPY201203398.